93 results on '"Espino, Fernando"'
Search Results
2. Natural language processing for clusterization of genes according to their functions
- Author
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Dordiuk, Vladislav, Demicheva, Ekaterina, Espino, Fernando Polanco, and Ushenin, Konstantin
- Subjects
Computer Science - Computation and Language ,68T50, 92-08 - Abstract
There are hundreds of methods for analysis of data obtained in mRNA-sequencing. The most of them are focused on small number of genes. In this study, we propose an approach that reduces the analysis of several thousand genes to analysis of several clusters. The list of genes is enriched with information from open databases. Then, the descriptions are encoded as vectors using the pretrained language model (BERT) and some text processing approaches. The encoded gene function pass through the dimensionality reduction and clusterization. Aiming to find the most efficient pipeline, 180 cases of pipeline with different methods in the major pipeline steps were analyzed. The performance was evaluated with clusterization indexes and expert review of the results., Comment: Ural-Siberian Conference on Computational Technologies in Cognitive Science, Genomics and Biomedicine 2022 (CSGB 2022)
- Published
- 2022
- Full Text
- View/download PDF
3. Black coral forests enhance taxonomic and functional distinctiveness of mesophotic fishes in an oceanic island: implications for biodiversity conservation
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Bosch, Nestor E., Espino, Fernando, Tuya, Fernando, Haroun, Ricardo, Bramanti, Lorenzo, and Otero-Ferrer, Francisco
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- 2023
- Full Text
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4. “Hidden” biodiversity: a new amphipod genus dominates epifauna in association with a mesophotic black coral forest
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Navarro-Mayoral, Sandra, Gouillieux, Benoit, Fernandez-Gonzalez, Victoria, Tuya, Fernando, Lecoquierre, Ninon, Bramanti, Lorenzo, Terrana, Lucas Alfonso, Espino, Fernando, Flot, Jean-François, Haroun, Ricardo, Otero-Ferrer, Francisco, Navarro-Mayoral, Sandra, Gouillieux, Benoit, Fernandez-Gonzalez, Victoria, Tuya, Fernando, Lecoquierre, Ninon, Bramanti, Lorenzo, Terrana, Lucas Alfonso, Espino, Fernando, Flot, Jean-François, Haroun, Ricardo, and Otero-Ferrer, Francisco
- Abstract
Black corals are important components of mesophotic and deep-water marine habitats. Their presence at great depths (e.g. 50 to 200 m) makes accessibility difficult, limiting our understanding of the associated biodiversity. Amphipods dominate vagile epifauna in marine habitats around the world, fulfilling important ecosystem functions. However, there are no studies on amphipods exclusively associated with black corals, including relationships between their ecological patterns (e.g. abundances) and the size of coral colonies. We investigated the epifaunal composition and abundance associated with black coral colonies of Antipathella wollastoni in the subtropical eastern Atlantic Ocean. In total, 1,736 epifaunal individuals were identified, of which 1,706 (98.27%) were amphipods, belonging to 6 taxa. We identified and described a new amphipod genus and species within the Stenothoidae family, Wollastenothoe minuta gen. nov. sp. nov. which outnumbered the amphipod assemblage (86.15%) and provided a complete taxonomic key of Stenothoidae family including this new finding. For the first time, the association between an amphipod species and a black coral was described, including a strong correlation between coral colony size and amphipod abundances. This study demonstrates that epifauna associated with mesophotic black corals remains largely undescribed., info:eu-repo/semantics/published
- Published
- 2024
5. Advances in Mass Spectrometry-Based Blood Metabolomics Profiling for Non-Cancer Diseases: A Comprehensive Review
- Author
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Demicheva, Ekaterina, primary, Dordiuk, Vladislav, additional, Polanco Espino, Fernando, additional, Ushenin, Konstantin, additional, Aboushanab, Saied, additional, Shevyrin, Vadim, additional, Buhler, Aleksey, additional, Mukhlynina, Elena, additional, Solovyova, Olga, additional, Danilova, Irina, additional, and Kovaleva, Elena, additional
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- 2024
- Full Text
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6. Can black coral forests be detected using multibeam echosounder “multi-detect” data?
- Author
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Feldens, Peter, primary, Held, Philipp, additional, Otero-Ferrer, Francisco, additional, Bramanti, Lorenzo, additional, Espino, Fernando, additional, and Schneider von Deimling, Jens, additional
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- 2023
- Full Text
- View/download PDF
7. Levelling-up rhodolith-bed science to address global-scale conservation challenges
- Author
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Tuya, Fernando, Schubert, Nadine, Aguirre, Julio, Basso, Daniela, Bastos, Eduardo O., Berchez, Flávio, Bernardino, Angelo F., Bosch, Néstor E., Burdett, Heidi L., Espino, Fernando, Fernández-Gárcia, Cindy, Francini-Filho, Ronaldo B., Gagnon, Patrick, Hall-Spencer, Jason M., Haroun, Ricardo, Hofmann, Laurie C., Horta, Paulo A., Kamenos, Nicholas A., Le Gall, Line, Magris, Rafael A., Martin, Sophie, Nelson, Wendy A., Neves, Pedro, Olivé, Irene, Otero-Ferrer, Francisco, Peña, Viviana, Pereira-Filho, Guilherme H., Ragazzola, Federica, Rebelo, Ana Cristina, Ribeiro, Cláudia, Rinde, Eli, Schoenrock, Kathryn, Silva, João, Sissini, Marina N., Tâmega, Frederico T.S., Tuya, Fernando, Schubert, Nadine, Aguirre, Julio, Basso, Daniela, Bastos, Eduardo O., Berchez, Flávio, Bernardino, Angelo F., Bosch, Néstor E., Burdett, Heidi L., Espino, Fernando, Fernández-Gárcia, Cindy, Francini-Filho, Ronaldo B., Gagnon, Patrick, Hall-Spencer, Jason M., Haroun, Ricardo, Hofmann, Laurie C., Horta, Paulo A., Kamenos, Nicholas A., Le Gall, Line, Magris, Rafael A., Martin, Sophie, Nelson, Wendy A., Neves, Pedro, Olivé, Irene, Otero-Ferrer, Francisco, Peña, Viviana, Pereira-Filho, Guilherme H., Ragazzola, Federica, Rebelo, Ana Cristina, Ribeiro, Cláudia, Rinde, Eli, Schoenrock, Kathryn, Silva, João, Sissini, Marina N., and Tâmega, Frederico T.S.
- Abstract
Global marine conservation remains fractured by an imbalance in research efforts and policy actions, limiting progression towards sustainability. Rhodolith beds represent a prime example, as they have ecological importance on a global scale, provide a wealth of ecosystem functions and services, including biodiversity provision and potential climate change mitigation, but remain disproportionately understudied, compared to other coastal ecosystems (tropical coral reefs, kelp forests, mangroves, seagrasses). Although rhodolith beds have gained some recognition, as important and sensitive habitats at national/regional levels during the last decade, there is still a notable lack of information and, consequently, specific conservation efforts. We argue that the lack of information about these habitats, and the significant ecosystem services they provide, is hindering the development of effective conservation measures and limiting wider marine conservation success. This is becoming a pressing issue, considering the multiple severe pressures and threats these habitats are exposed to (e.g., pollution, fishing activities, climate change), which may lead to an erosion of their ecological function and ecosystem services. By synthesizing the current knowledge, we provide arguments to highlight the importance and urgency of levelling-up research efforts focused on rhodolith beds, combating rhodolith bed degradation and avoiding the loss of associated biodiversity, thus ensuring the sustainability of future conservation programs.
- Published
- 2023
- Full Text
- View/download PDF
8. Thermal stress response of Antipathella wollastoni (Gray, 1857) from the Canary Islands archipelago
- Author
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Gouveia, Adriana, Godefroid, Mathilde, Dubois, Philippe, Espino, Fernando, Tuya, Fernando, Haroun, Ricardo, Herrera, Alicia, Otero-Ferrer, Francisco, Gouveia, Adriana, Godefroid, Mathilde, Dubois, Philippe, Espino, Fernando, Tuya, Fernando, Haroun, Ricardo, Herrera, Alicia, and Otero-Ferrer, Francisco
- Abstract
The present study aims at assessing the thermal tolerance of the black coral Antipathella wollastoni (Gray, 1857), which forms extensive forests in multiple Macaronesian islands. Fragments of A. wollastoni were exposed for 15 d to temperature conditions ranging from 19 to 26.5 °C, and multiple endpoints were investigated. No mortality was observed, and total antioxidant capacity remained unaffected by temperature increase. Respiration rates described a Gaussian relationship and tissue necrosis a linear increase with temperature. Increased temperature triggered the formation of bailout propagules, a process that may be used by the species as an escape strategy under unfavourable environmental conditions. Propagules of A. wollastoni were described for the first time. Altogether, A. wollastoni was suggested to have low vulnerability to increased temperatures, owing to its wide thermal window of performance (9.7 °C) and thermal safety margin (1.2 °C), similar to its congeneric Mediterranean Antipathella subpinnata ., Gouveia A. and Godefroid M. contributed equally., SCOPUS: ar.j, info:eu-repo/semantics/published
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- 2023
9. Local thermal variation modulates resilience to warming in a marine foundation species: evidence from seagrass seedlings
- Author
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Tomàs, Fiona, Pereda-Briones, Laura, Royo, Laura, Combes, Vincent, Ballesteros, Enric, Clemente, Sabrina, Edery, Gal·la, Espino, Fernando, Farina, Simone, Fernández-Torquemada, Yolanda, Gerovasileiou, Vasilis, Guala, Ivan, Ivesa, Ljiijana, Sini, Maria, Procaccini, Gabriele, Terrados, Jorge, Marín-Guirao, Lázaro, Tuya, Fernando, Tomàs, Fiona, Pereda-Briones, Laura, Royo, Laura, Combes, Vincent, Ballesteros, Enric, Clemente, Sabrina, Edery, Gal·la, Espino, Fernando, Farina, Simone, Fernández-Torquemada, Yolanda, Gerovasileiou, Vasilis, Guala, Ivan, Ivesa, Ljiijana, Sini, Maria, Procaccini, Gabriele, Terrados, Jorge, Marín-Guirao, Lázaro, and Tuya, Fernando
- Abstract
Disturbances associated with climate change may push organisms beyond their resilience limits, and strong ecological consequences are expected when foundation species are affected. When predicting species’ responses to warming, species are typically considered as physiologically homogeneous. Yet, responses to extreme events may vary according to differences in phenotypic plasticity and local adaptation across the range of a species. Using a common-garden mesocosm experiment, we compared the resilience (i.e., response to and recovery from) to two warming events of different intensity on seagrass seedlings germinated from seeds collected at eight regions across the species’ distribution range. We show a positive relationship between resilience to warming and local thermal variability, suggesting seagrass evolutionary adaptation to local thermal conditions. Our results highlight the critical importance of incorporating intra-specific variability when making predictions and when developing conservation and restoration strategies about species vulnerability to climate change. Furthermore, strong negative lag-effects on seedlings performance were observed after the warming phase had already stopped, highlighting the importance of following species’ responses after a disturbance has finished, particularly because most experimental studies have only examined immediate, short-term, responses to stressors. Given the long-term common-garden approach used, we expect that differences in seedling responses will be mainly the result of genetic changes leading to local adaptation.
- Published
- 2023
10. Higher daily temperature range at depth is linked with higher thermotolerance in antipatharians from the canary islands
- Author
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Godefroid, Mathilde, Gouveia, Adriana, Otero-Ferrer, Francisco, Espino, Fernando, Tuya, Fernando, Dubois, Philippe, Godefroid, Mathilde, Gouveia, Adriana, Otero-Ferrer, Francisco, Espino, Fernando, Tuya, Fernando, and Dubois, Philippe
- Abstract
Sensitivity to ocean warming is generally expected to be lower in populations from more heterogeneous thermal environments, owing to greater phenotypic plasticity and/or genotype selection. While resilience of benthic populations from thermally fluctuating environments has been investigated at a variety of spatial scales, this has received limited attention across depths and has remained unresolved for Antipatharian corals, key habitat-forming species across a wide bathymetric range in all of the world oceans. In this study, we aimed at addressing the thermal sensitivity of Antipatharian corals across depths characterized by different levels of temperature fluctuations. We used an acute ramping experimental approach to compare the thermal sensitivity of colonies of (1) the branched Antipatharian Antipathella wollastoni (Gray, 1857) from two distinct depths (25 and 40 m) in Gran Canaria (Canary Islands, Spain); and of (2) unbranched mesophotic (80 m) Stichopathes species, from Lanzarote (Canary Islands, Spain; S. gracilis (Gray, 1857)), and Stichopathes sp. clade C from Mo'orea, French Polynesia. Results showed that the daily temperature range in Gran Canaria was larger at mesophotic depths (3.9 °C vs. 2.8 °C at 40 and 25 m, respectively) and this coincided with lower thermal sensitivity in mesophotic colonies of A. wollastoni. Second, S. gracilis from Lanzarote showed a lower thermal sensitivity than the previously studied Stichopathes sp. clade C from Mo'orea (French Polynesia) inhabiting a less variable habitat. These results are in line with the climate variability hypothesis, which states that populations under more variable thermal conditions have a lower sensitivity to warming than those from more stable environments, as they have adapted/acclimated to these higher levels of temperature fluctuations., SCOPUS: ar.j, info:eu-repo/semantics/published
- Published
- 2023
11. Levelling-up rhodolith-bed science to address global-scale conservation challenges
- Author
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Tuya, F, Schubert, N, Aguirre, J, Basso, D, Bastos, E, Berchez, F, Bernardino, A, Bosch, N, Burdett, H, Espino, F, Fernández-Gárcia, C, Francini-Filho, R, Gagnon, P, Hall-Spencer, J, Haroun, R, Hofmann, L, Horta, P, Kamenos, N, Le Gall, L, Magris, R, Martin, S, Nelson, W, Neves, P, Olivé, I, Otero-Ferrer, F, Peña, V, Pereira-Filho, G, Ragazzola, F, Rebelo, A, Ribeiro, C, Rinde, E, Schoenrock, K, Silva, J, Sissini, M, Tâmega, F, Tuya, Fernando, Schubert, Nadine, Aguirre, Julio, Basso, Daniela, Bastos, Eduardo O, Berchez, Flávio, Bernardino, Angelo F, Bosch, Néstor E, Burdett, Heidi L, Espino, Fernando, Fernández-Gárcia, Cindy, Francini-Filho, Ronaldo B, Gagnon, Patrick, Hall-Spencer, Jason M, Haroun, Ricardo, Hofmann, Laurie C, Horta, Paulo A, Kamenos, Nicholas A, Le Gall, Line, Magris, Rafael A, Martin, Sophie, Nelson, Wendy A, Neves, Pedro, Olivé, Irene, Otero-Ferrer, Francisco, Peña, Viviana, Pereira-Filho, Guilherme H, Ragazzola, Federica, Rebelo, Ana Cristina, Ribeiro, Cláudia, Rinde, Eli, Schoenrock, Kathryn, Silva, João, Sissini, Marina N, Tâmega, Frederico T S, Tuya, F, Schubert, N, Aguirre, J, Basso, D, Bastos, E, Berchez, F, Bernardino, A, Bosch, N, Burdett, H, Espino, F, Fernández-Gárcia, C, Francini-Filho, R, Gagnon, P, Hall-Spencer, J, Haroun, R, Hofmann, L, Horta, P, Kamenos, N, Le Gall, L, Magris, R, Martin, S, Nelson, W, Neves, P, Olivé, I, Otero-Ferrer, F, Peña, V, Pereira-Filho, G, Ragazzola, F, Rebelo, A, Ribeiro, C, Rinde, E, Schoenrock, K, Silva, J, Sissini, M, Tâmega, F, Tuya, Fernando, Schubert, Nadine, Aguirre, Julio, Basso, Daniela, Bastos, Eduardo O, Berchez, Flávio, Bernardino, Angelo F, Bosch, Néstor E, Burdett, Heidi L, Espino, Fernando, Fernández-Gárcia, Cindy, Francini-Filho, Ronaldo B, Gagnon, Patrick, Hall-Spencer, Jason M, Haroun, Ricardo, Hofmann, Laurie C, Horta, Paulo A, Kamenos, Nicholas A, Le Gall, Line, Magris, Rafael A, Martin, Sophie, Nelson, Wendy A, Neves, Pedro, Olivé, Irene, Otero-Ferrer, Francisco, Peña, Viviana, Pereira-Filho, Guilherme H, Ragazzola, Federica, Rebelo, Ana Cristina, Ribeiro, Cláudia, Rinde, Eli, Schoenrock, Kathryn, Silva, João, Sissini, Marina N, and Tâmega, Frederico T S
- Abstract
Global marine conservation remains fractured by an imbalance in research efforts and policy actions, limiting progression towards sustainability. Rhodolith beds represent a prime example, as they have ecological importance on a global scale, provide a wealth of ecosystem functions and services, including biodiversity provision and potential climate change mitigation, but remain disproportionately understudied, compared to other coastal ecosystems (tropical coral reefs, kelp forests, mangroves, seagrasses). Although rhodolith beds have gained some recognition, as important and sensitive habitats at national/regional levels during the last decade, there is still a notable lack of information and, consequently, specific conservation efforts. We argue that the lack of information about these habitats, and the significant ecosystem services they provide, is hindering the development of effective conservation measures and limiting wider marine conservation success. This is becoming a pressing issue, considering the multiple severe pressures and threats these habitats are exposed to (e.g., pollution, fishing activities, climate change), which may lead to an erosion of their ecological function and ecosystem services. By synthesizing the current knowledge, we provide arguments to highlight the importance and urgency of levelling-up research efforts focused on rhodolith beds, combating rhodolith bed degradation and avoiding the loss of associated biodiversity, thus ensuring the sustainability of future conservation programs.
- Published
- 2023
12. Effect of Depth across a Latitudinal Gradient in the Structure of Rhodolith Seabeds and Associated Biota across the Eastern Atlantic Ocean
- Author
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Pérez Peris, Inés, Navarro-Mayoral, Sandra, Cosme De Esteban, Marcial, Tuya, F., Peña, Viviana, Bárbara, Ignacio, Neves, Pedro A., Ribeiro, Cláudia, Abreu, António, Grall, Jacques, Espino, Fernando, Bosch Guerra, Néstor Echedey, Haroun, R., Otero Ferrer, Francisco J., Pérez Peris, Inés, Navarro-Mayoral, Sandra, Cosme De Esteban, Marcial, Tuya, F., Peña, Viviana, Bárbara, Ignacio, Neves, Pedro A., Ribeiro, Cláudia, Abreu, António, Grall, Jacques, Espino, Fernando, Bosch Guerra, Néstor Echedey, Haroun, R., and Otero Ferrer, Francisco J.
- Abstract
[Abstract] Rhodolith seabeds are ‘ecosystem engineers’ composed of free-living calcareous red macroalgae, which create extensive marine habitats. This study addressed how depth influenced the structure (size and morphology) of rhodoliths and the abundance of associated floral and faunal epibionts across the Eastern Atlantic Ocean. Sampling was carried out at two sites within five regions (Brittany, Galicia, Madeira, Gran Canaria, and Principe Island), from temperate to tropical, covering a latitudinal gradient of 47°, in three depth strata (shallow, intermediate and deep), according to the rhodolith bathymetrical range in each region. Depth typically affected the rhodolith size at all regions; the largest nodules were found in the intermediate and deep strata, while rhodolith sphericity was larger at the shallow depth strata. Higher biomasses of attached macroalgae (epiphytes) were observed at depths where rhodoliths were larger. The abundance of epifauna was variable across regions and depth strata. In general, the occurrence, structure, and abundance of the associated biota across rhodolith habitats were affected by depth, with local variability (i.e., sites within regions) often displaying a more significant influence than the regional (large-scale) variation. Overall, this study showed that the rhodolith morphology and associated epibionts (flora and fauna) were mostly affected by depth, irrespective of latitude.
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- 2023
13. Drivers of variation in seagrass-associated amphipods across biogeographical areas
- Author
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Universidad de Alicante. Departamento de Ciencias del Mar y Biología Aplicada, Navarro-Mayoral, Sandra, Tuya, Fernando, Prado, Patricia, Marco-Méndez, Candela, Fernandez-Gonzalez, Victoria, Fernández-Torquemada, Yolanda, Espino, Fernando, de-la-Ossa-Carretero, Jose Antonio, Mateu Vilella, David, Machado, Margarida, Martínez-Crego, Begoña, Universidad de Alicante. Departamento de Ciencias del Mar y Biología Aplicada, Navarro-Mayoral, Sandra, Tuya, Fernando, Prado, Patricia, Marco-Méndez, Candela, Fernandez-Gonzalez, Victoria, Fernández-Torquemada, Yolanda, Espino, Fernando, de-la-Ossa-Carretero, Jose Antonio, Mateu Vilella, David, Machado, Margarida, and Martínez-Crego, Begoña
- Abstract
Amphipods are one of the dominant epifaunal groups in seagrass meadows. However, our understanding of the biogeographical patterns in the distribution of these small crustaceans is limited. In this study, we investigated such patterns and the potential drivers in twelve Cymodocea nodosa meadows within four distinctive biogeographical areas across 2000 Km and 13° of latitude in two ocean basins (Mediterranean Sea and Atlantic Ocean). We found that species abundances in the assemblage of seagrass-associated amphipods differed among areas following a pattern largely explained by seagrass leaf area and epiphyte biomass, while the variation pattern in species presence/absence was determined by seagrass density and epiphyte biomass. Seagrass leaf area was also the most important determinant of greater amphipod total density and species richness, while amphipod density also increased with algal cover. Overall, our results evidenced that biogeographical patterns of variation in amphipod assemblages are mainly influenced by components of the habitat structure, which covary with environmental conditions, finding that structurally more complex meadows harboring higher abundance and richness of amphipods associated.
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- 2023
14. Effect of Chronic Versus Pulse Perturbations on a Marine Ecosystem: Integration of Functional Responses Across Organization Levels
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Tuya, Fernando, Betancor, Séfora, Viera-Rodríguez, María A., Guedes, Rayco, Riera, Rodrigo, Haroun, Ricardo, and Espino, Fernando
- Published
- 2015
15. Effect of Depth across a Latitudinal Gradient in the Structure of Rhodolith Seabeds and Associated Biota across the Eastern Atlantic Ocean
- Author
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Pérez-Peris, Inés, primary, Navarro-Mayoral, Sandra, additional, de Esteban, Marcial Cosme, additional, Tuya, Fernando, additional, Peña, Viviana, additional, Barbara, Ignacio, additional, Neves, Pedro, additional, Ribeiro, Claudia, additional, Abreu, Antonio, additional, Grall, Jacques, additional, Espino, Fernando, additional, Bosch, Nestor Echedey, additional, Haroun, Ricardo, additional, and Otero-Ferrer, Francisco, additional
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- 2023
- Full Text
- View/download PDF
16. Coastal sharks and rays in the Northeastern Atlantic: From an urgent call to collect more data to the declaration of a marine corridor
- Author
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Tuya, Fernando, primary, Pérez-Neira, Fátima, additional, Espino, Fernando, additional, Bosch, Néstor E., additional, Meyers, Eva K.M., additional, Jiménez-Alvarado, David, additional, Castro, José J., additional, Sobral, Ana, additional, Otero-Ferrer, Francisco, additional, and Haroun, Ricardo, additional
- Published
- 2022
- Full Text
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17. Variation in Fish Abundance, Diversity and Assemblage Structure in Seagrass Meadows across the Atlanto-Mediterranean Province
- Author
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Máñez-Crespo, Julia, primary, Tomas, Fiona, additional, Fernández-Torquemada, Yolanda, additional, Royo, Laura, additional, Espino, Fernando, additional, Antich, Laura, additional, Bosch, Néstor E., additional, Castejón, Inés, additional, Hernan, Gema, additional, Marco-Méndez, Candela, additional, Mateo-Ramírez, Ángel, additional, Pereda-Briones, Laura, additional, Del Pilar-Ruso, Yoana, additional, Terrados, Jorge, additional, and Tuya, Fernando, additional
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- 2022
- Full Text
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18. Distribution and population structure of the smooth‐hound shark, Mustelus mustelus (Linnaeus, 1758), across an oceanic archipelago: Combining several data sources to promote conservation
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Espino, Fernando, primary, González, José Antonio, additional, Bosch, Néstor E., additional, Otero‐Ferrer, Francisco J., additional, Haroun, Ricardo, additional, and Tuya, Fernando, additional
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- 2022
- Full Text
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19. Rhodolith Physiology Across the Atlantic: Towards a Better Mechanistic Understanding of Intra- and Interspecific Differences
- Author
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Schubert, Nadine, primary, Peña, Viviana, additional, Salazar, Vinícius W., additional, Horta, Paulo A., additional, Neves, Pedro, additional, Ribeiro, Cláudia, additional, Otero-Ferrer, Francisco, additional, Tuya, Fernando, additional, Espino, Fernando, additional, Schoenrock, Kathryn, additional, Hofmann, Laurie C., additional, Le Gall, Line, additional, Santos, Rui, additional, and Silva, João, additional
- Published
- 2022
- Full Text
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20. Seagrass responses to nutrient enrichment depend on clonal integration, but not flow-on effects on associated biota
- Author
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Tuya, Fernando, Viera-Rodríguez, María A., Guedes, Rayco, Espino, Fernando, Haroun, Ricardo, and Terrados, Jorge
- Published
- 2013
21. Variation in Fish Abundance, Diversity and Assemblage Structure in Seagrass Meadows across the Atlanto-Mediterranean Province
- Author
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Máñez-Crespo, Julia, Tomas, Fiona, Fernández-Torquemada, Yolanda, Royo, Laura, Espino, Fernando, Antich, Laura, Bosch, Néstor E., Castejón, Gema, Marco-Méndez, Candela, Mateo-Ramírez, Ángel, Pereda-Briones, Laura, Del Pilar-Ruso, Yoana, Terrados, Jorge, Tuya, Fernando, Máñez-Crespo, Julia, Tomas, Fiona, Fernández-Torquemada, Yolanda, Royo, Laura, Espino, Fernando, Antich, Laura, Bosch, Néstor E., Castejón, Gema, Marco-Méndez, Candela, Mateo-Ramírez, Ángel, Pereda-Briones, Laura, Del Pilar-Ruso, Yoana, Terrados, Jorge, and Tuya, Fernando
- Abstract
Seagrasses worldwide provide key habitats for fish assemblages. Biogeographical disparities in ocean climate conditions and seasonal regimes are well-known drivers of the spatial and temporal variation in seagrass structure, with potential effects on associated fish assemblages. Whether taxonomically disparate fish assemblages support a similar range of ecological functions remains poorly tested in seagrass ecosystems. In this study, we examined variation in the abundance, diversity (from a taxonomic and functional perspective), and assemblage structure of fish community inhabiting nine meadows of the seagrass Cymodocea nodosa across three regions in the Mediterranean (Mallorca and Alicante) and the adjacent Atlantic (Gran Canaria), and identified which attributes typifying the structure of meadows, and large-scale variability in ocean climate, contributed most to explaining such ecological variation. Despite a similar total number of species between Mallorca and Gran Canaria, the latter region had more taxonomically and functionally diverse fish assemblages relative to the western Mediterranean regions, which translated into differences in multivariate assemblage structure. While variation in the abundance of the most conspicuous fish species was largely explained by variation in seagrass structural descriptors, most variation in diversity was accounted for by a descriptor of ocean climate (mean seasonal SST), operating at regional scales. Variation in fish assemblage structure was, to a lesser extent, also explained by local variability in seagrass structure. Beyond climatic drivers, our results suggest that lower temporal variability in the canopy structure of C. nodosa meadows in Gran Canaria provides a more consistent source of food and protection for associated fish assemblages, which likely enhances the more abundant and diverse fish assemblages there
- Published
- 2022
22. Variation in Fish Abundance, Diversity and Assemblage Structure in Seagrass Meadows across the Atlanto-Mediterranean Province
- Author
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Universidad de Alicante. Departamento de Ciencias del Mar y Biología Aplicada, Máñez-Crespo, Julia, Tomas, Fiona, Fernández-Torquemada, Yolanda, Royo, Laura, Espino, Fernando, Antich, Laura, Bosch, Néstor E., Castejón, Inés, Hernan, Gema, Marco-Méndez, Candela, Mateo-Ramírez, Ángel, Pereda-Briones, Laura, Del-Pilar-Ruso, Yoana, Terrados, Jorge, Tuya, Fernando, Universidad de Alicante. Departamento de Ciencias del Mar y Biología Aplicada, Máñez-Crespo, Julia, Tomas, Fiona, Fernández-Torquemada, Yolanda, Royo, Laura, Espino, Fernando, Antich, Laura, Bosch, Néstor E., Castejón, Inés, Hernan, Gema, Marco-Méndez, Candela, Mateo-Ramírez, Ángel, Pereda-Briones, Laura, Del-Pilar-Ruso, Yoana, Terrados, Jorge, and Tuya, Fernando
- Abstract
Seagrasses worldwide provide key habitats for fish assemblages. Biogeographical disparities in ocean climate conditions and seasonal regimes are well-known drivers of the spatial and temporal variation in seagrass structure, with potential effects on associated fish assemblages. Whether taxonomically disparate fish assemblages support a similar range of ecological functions remains poorly tested in seagrass ecosystems. In this study, we examined variation in the abundance, diversity (from a taxonomic and functional perspective), and assemblage structure of fish community inhabiting nine meadows of the seagrass Cymodocea nodosa across three regions in the Mediterranean (Mallorca and Alicante) and the adjacent Atlantic (Gran Canaria), and identified which attributes typifying the structure of meadows, and large-scale variability in ocean climate, contributed most to explaining such ecological variation. Despite a similar total number of species between Mallorca and Gran Canaria, the latter region had more taxonomically and functionally diverse fish assemblages relative to the western Mediterranean regions, which translated into differences in multivariate assemblage structure. While variation in the abundance of the most conspicuous fish species was largely explained by variation in seagrass structural descriptors, most variation in diversity was accounted for by a descriptor of ocean climate (mean seasonal SST), operating at regional scales. Variation in fish assemblage structure was, to a lesser extent, also explained by local variability in seagrass structure. Beyond climatic drivers, our results suggest that lower temporal variability in the canopy structure of C. nodosa meadows in Gran Canaria provides a more consistent source of food and protection for associated fish assemblages, which likely enhances the more abundant and diverse fish assemblages there.
- Published
- 2022
23. Differences in the occurrence and abundance of batoids across an oceanic archipelago using complementary data sources: Implications for conservation
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Tuya, Fernando, primary, Aguilar, Ricardo, additional, Espino, Fernando, additional, Bosch, Nestor E., additional, Meyers, Eva K. M., additional, Jiménez‐Alvarado, David, additional, Castro, Jose J., additional, Otero‐Ferrer, Francisco, additional, and Haroun, Ricardo, additional
- Published
- 2021
- Full Text
- View/download PDF
24. Partitioning resilience of a marine foundation species into resistance and recovery trajectories
- Author
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Universidad de Alicante. Departamento de Ciencias del Mar y Biología Aplicada, Tuya, Fernando, Fernández-Torquemada, Yolanda, Del-Pilar-Ruso, Yoana, Espino, Fernando, Manent, Pablo, Curbelo, Leticia, Otero-Ferrer, Francisco, de-la-Ossa-Carretero, Jose Antonio, Royo, Laura, Antich, Laura, Castejón, Inés, Máñez-Crespo, Julia, Mateo-Ramírez, Ángel, Procaccini, Gabriele, Marco-Méndez, Candela, Terrados, Jorge, Tomas, Fiona, Universidad de Alicante. Departamento de Ciencias del Mar y Biología Aplicada, Tuya, Fernando, Fernández-Torquemada, Yolanda, Del-Pilar-Ruso, Yoana, Espino, Fernando, Manent, Pablo, Curbelo, Leticia, Otero-Ferrer, Francisco, de-la-Ossa-Carretero, Jose Antonio, Royo, Laura, Antich, Laura, Castejón, Inés, Máñez-Crespo, Julia, Mateo-Ramírez, Ángel, Procaccini, Gabriele, Marco-Méndez, Candela, Terrados, Jorge, and Tomas, Fiona
- Abstract
The resilience of an ecological unit encompasses resistance during adverse conditions and the capacity to recover. We adopted a ‘resistance-recovery’ framework to experimentally partition the resilience of a foundation species (the seagrass Cymodocea nodosa). The shoot abundances of nine seagrass meadows were followed before, during and after simulated light reduction conditions. We determined the significance of ecological, environmental and genetic drivers on seagrass resistance (% of shoots retained during the light deprivation treatments) and recovery (duration from the end of the perturbed state back to initial conditions). To identify whether seagrass recovery was linearly related to prior resistance, we then established the connection between trajectories of resistance and recovery. Finally, we assessed whether recovery patterns were affected by biological drivers (production of sexual products—seeds—and asexual propagation) at the meadow-scale. Resistance to shading significantly increased with the genetic diversity of the meadow and seagrass recovery was conditioned by initial resistance during shading. A threshold in resistance (here, at a ca. 70% of shoot abundances retained during the light deprivation treatments) denoted a critical point that considerably delays seagrass recovery if overpassed. Seed densities, but not rhizome elongation rates, were higher in meadows that exhibited large resistance and quick recovery, which correlated positively with meadow genetic diversity. Our results highlight the critical role of resistance to a disturbance for persistence of a marine foundation species. Estimation of critical trade-offs between seagrass resistance and recovery is a promising field of research to better manage impacts on seagrass meadows.
- Published
- 2021
25. Driving factors of biogeographical variation in seagrass herbivory
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Universidad de Alicante. Departamento de Ciencias del Mar y Biología Aplicada, Martínez-Crego, Begoña, Prado, Patricia, Marco-Méndez, Candela, Fernández-Torquemada, Yolanda, Espino, Fernando, Sánchez-Lizaso, José Luis, de-la-Ossa-Carretero, Jose Antonio, Vilella, David Mateu, Machado, Margarida, Tuya, Fernando, Universidad de Alicante. Departamento de Ciencias del Mar y Biología Aplicada, Martínez-Crego, Begoña, Prado, Patricia, Marco-Méndez, Candela, Fernández-Torquemada, Yolanda, Espino, Fernando, Sánchez-Lizaso, José Luis, de-la-Ossa-Carretero, Jose Antonio, Vilella, David Mateu, Machado, Margarida, and Tuya, Fernando
- Abstract
Despite the crucial role of herbivory in shaping community assembly, our understanding on biogeographical patterns of herbivory on seagrasses is limited compared to that on terrestrial plants. In particular, the drivers of such patterns remain largely unexplored. Here, we used a comparative-experimental approach in Cymodocea nodosa meadows, across all possible climate types within the seagrass distribution, 2000 km and 13° of latitude in two ocean basins, to investigate biogeographical variation in seagrass herbivory intensity and their drivers during July 2014. Particularly, the density and richness of herbivores and their food resources, seagrass size, carbon and nitrogen content, as well as latitude, sea surface temperature, salinity, chlorophyll, and sediment grain size, were tested as potential drivers. We found that shallow meadows can be subjected to intense herbivory, with variation in herbivory largely explained by fish density, seagrass size, and annual sea temperature range. The herbivorous fish density was the most important determinant of such variation, with the dominant seagrass consumer, the fish Sarpa salpa, absent at meadows from regions with low herbivory. In temperate regions where herbivorous fish are present, annual temperature ranges drive an intense summer herbivory, which is likely mediated not only by increased herbivore metabolic demands at higher temperatures, but also by higher fish densities. Invertebrate grazing (mainly by sea urchins, isopods, amphipods, and/or gastropods) was the dominant leaf herbivory in some temperate meadows, with grazing variation mainly influenced by seagrass shoot size. At the subtropical region (under reduced annual temperature range), lower shoot densities and seagrass nitrogen contents contributed to explain the almost null herbivory. We evidenced the combined influence of drivers acting at geographic (region) and local (meadow) scales, the understanding of which is critical for a clear prediction of variat
- Published
- 2021
26. Partitioning resilience of a marine foundation species into resistance and recovery trajectories
- Author
-
Tuya, Fernando, Fernández-Torquemada, Yolanda, Pilar-Ruso, Yoana del, Espino, Fernando, Manent, Pablo, Curbelo, Leticia, Otero-Ferrer, F., Ossa, José A. de la, Royo, Laura, Antich, Laura, Castejón-Silvo, Inés, Máñez-Crespo, Julia, Mateo-Ramírez, Ángel, Procaccini, Gabriele, Marco-Méndez, Candela, Terrados, Jorge, Tomàs, Fiona, Tuya, Fernando, Fernández-Torquemada, Yolanda, Pilar-Ruso, Yoana del, Espino, Fernando, Manent, Pablo, Curbelo, Leticia, Otero-Ferrer, F., Ossa, José A. de la, Royo, Laura, Antich, Laura, Castejón-Silvo, Inés, Máñez-Crespo, Julia, Mateo-Ramírez, Ángel, Procaccini, Gabriele, Marco-Méndez, Candela, Terrados, Jorge, and Tomàs, Fiona
- Abstract
The resilience of an ecological unit encompasses resistance during adverse conditions and the capacity to recover. We adopted a ‘resistance-recovery’ framework to experimentally partition the resilience of a foundation species (the seagrass Cymodocea nodosa). The shoot abundances of nine seagrass meadows were followed before, during and after simulated light reduction conditions. We determined the significance of ecological, environmental and genetic drivers on seagrass resistance (% of shoots retained during the light deprivation treatments) and recovery (duration from the end of the perturbed state back to initial conditions). To identify whether seagrass recovery was linearly related to prior resistance, we then established the connection between trajectories of resistance and recovery. Finally, we assessed whether recovery patterns were affected by biological drivers (production of sexual products—seeds—and asexual propagation) at the meadow-scale. Resistance to shading significantly increased with the genetic diversity of the meadow and seagrass recovery was conditioned by initial resistance during shading. A threshold in resistance (here, at a ca. 70% of shoot abundances retained during the light deprivation treatments) denoted a critical point that considerably delays seagrass recovery if overpassed. Seed densities, but not rhizome elongation rates, were higher in meadows that exhibited large resistance and quick recovery, which correlated positively with meadow genetic diversity. Our results highlight the critical role of resistance to a disturbance for persistence of a marine foundation species. Estimation of critical trade-offs between seagrass resistance and recovery is a promising field of research to better manage impacts on seagrass meadows.
- Published
- 2021
27. Driving factors of biogeographical variation in seagrass herbivory
- Author
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Martínez-Crego, Begoña, Prado, Patricia, Marco-Méndez, Candela, Fernández-Torquemada, Yolanda, Espino, Fernando, Sánchez Lizaso, José L., de la Ossa, Jose Antonio, Mateu Vilella, David, Machado, Margarida, Tuya, Fernando, Martínez-Crego, Begoña, Prado, Patricia, Marco-Méndez, Candela, Fernández-Torquemada, Yolanda, Espino, Fernando, Sánchez Lizaso, José L., de la Ossa, Jose Antonio, Mateu Vilella, David, Machado, Margarida, and Tuya, Fernando
- Abstract
Despite the crucial role of herbivory in shaping community assembly, our understanding on biogeographical patterns of herbivory on seagrasses is limited compared to that on terrestrial plants. In particular, the drivers of such patterns remain largely unexplored. Here, we used a comparative-experimental approach in Cymodocea nodosa meadows, across all possible climate types within the seagrass distribution, 2000 km and 13° of latitude in two ocean basins, to investigate biogeographical variation in seagrass herbivory intensity and their drivers during July 2014. Particularly, the density and richness of herbivores and their food resources, seagrass size, carbon and nitrogen content, as well as latitude, sea surface temperature, salinity, chlorophyll, and sediment grain size, were tested as potential drivers. We found that shallow meadows can be subjected to intense herbivory, with variation in herbivory largely explained by fish density, seagrass size, and annual sea temperature range. The herbivorous fish density was themost important determinant of such variation,with the dominant seagrass consumer, the fish Sarpa salpa, absent atmeadows from regionswith lowherbivory. In temperate regionswhere herbivorous fish are present, annual temperature ranges drive an intense summer herbivory, which is likelymediated not only by increased herbivore metabolic demands at higher temperatures, but also by higher fish densities. Invertebrate grazing (mainly by sea urchins, isopods, amphipods, and/or gastropods) was the dominant leaf herbivory in some temperate meadows, with grazing variation mainly influenced by seagrass shoot size. At the subtropical region (under reduced annual temperature range), lower shoot densities and seagrass nitrogen contents contributed to explain the almost null herbivory.We evidenced the combined influence of drivers acting at geographic (region) and local (meadow) scales, the understanding of which is critical for a clear prediction of variation in s
- Published
- 2021
28. Niche and neutral assembly mechanisms contribute to latitudinal diversity gradients in reef fishes
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Bosch, Nestor E., Wernberg, Thomas, Langlois, Tim J., Smale, Dan A., Moore, Pippa J., Franco, João N., Thiriet, P., Feunteun, Eric, Ribeiro, Cláudia, Neves, Pedro, Freitas, Rui, Filbee-Dexter, Karen, Norderhaug, Kjell Magnus, García, Álvaro, Otero-Ferrer, F., Espino, Fernando, Haroun, Ricardo, Lazzari, Natali, Tuya, Fernando, Bosch, Nestor E., Wernberg, Thomas, Langlois, Tim J., Smale, Dan A., Moore, Pippa J., Franco, João N., Thiriet, P., Feunteun, Eric, Ribeiro, Cláudia, Neves, Pedro, Freitas, Rui, Filbee-Dexter, Karen, Norderhaug, Kjell Magnus, García, Álvaro, Otero-Ferrer, F., Espino, Fernando, Haroun, Ricardo, Lazzari, Natali, and Tuya, Fernando
- Abstract
Aim The influence of niche and neutral mechanisms on the assembly of ecological communities have long been debated. However, we still have a limited knowledge on their relative importance to explain patterns of diversity across latitudinal gradients (LDG). Here, we investigate the extent to which these ecological mechanisms contribute to the LDG of reef fishes. Location Eastern Atlantic Ocean. Taxon Reef-associated ray-finned fishes. Methods We combined abundance data across ~60° of latitude with functional trait data and phylogenetic trees. A null model approach was used to decouple the influence of taxonomic diversity (TD) on functional (FD) and phylogenetic (PD) diversity. Standardized effect sizes (SES FD and SES PD) were used to explore patterns of overdispersion, clustering and randomness. Information theoretic approaches were used to investigate the role of large- (temperature, geographic isolation, nitrate and net primary productivity) and local-scale (human population and depth) drivers. We further assessed the role of demographic stochasticity and its interaction with species trophic identity and dispersal capacity. Results Taxonomic diversity peaked at ~15°–20°N, with a second mode of lower magnitude at ~45°N; a pattern that was predicted by temperature, geographic isolation and productivity. Tropical regions displayed a higher proportion of overdispersed assemblages, whilst clustering increased towards temperate regions. Phylogenetic and functional overdispersion were associated with warmer, productive and isolated regions. Demographic stochasticity also contributed largely to community assembly, independently of ecoregions, although variation was dependent on the trophic identity and body size of species. Main conclusions Niche-based processes linking thermal and resource constraints to local coexistence mechanisms have contributed to the LDG in reef fishes. These processes do not act in isolation, stressing the importance of understanding interactions
- Published
- 2021
29. Explosión demográfica de un hidrozoo exótico en una isla oceánica
- Author
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Espino, Fernando, Otero-Ferrer, Francisco J., Bosch, Néstor E., Coca, Josep, Haroun, Ricardo, Tuya, Fernando, Excellence International Campus of the Canary Islands (CEI-Canarias), Agency for Research, Innovation and Information Society of the Canary Islands, and EcoAqua European project (ERA CHAIR programme - Grant Agreement no. 621341)
- Subjects
especie exótica ,hidrozoo ,colonización ,hábitats costeros ,Islas Canarias ,non-indigenous species ,hydrozoan ,colonization ,nearshore habitats ,Canary Islands - Abstract
The arrival of non-indigenous species into new areas is one of the main processes altering the oceans globally. Macrorhynchia philippina is a large-sized colonial hydrozoan of an invasive nature. To obtain a deeper understanding of the process of colonization of new areas, it is essential to describe the ecological pattern through scales of temporal and spatial variation. In this study, we describe the colonization by M. Philippina of an oceanic island (Gran Canaria Island, Canary Islands, eastern Atlantic). We describe the abundance and size structure patterns of M. Philippina in three nearshore habitats, rocky reefs, seagrass meadows and rhodolith seabeds, at times before (2014), during (2016) and after (2017) the demographic explosion of this species. On rocky reefs and rhodolith seabeds, the abundance of colonies increased dramatically in 2017 relative to 2014, e.g. from 0 to 138 colonies/100 m2. On seagrass meadows, however, the colonies were smaller. In summary, M. Philippina shows an ecological plasticity to rapidly colonize different types of nearshore habitats, but with varying success., La aparición de especies exóticas es uno de los principales factores que alteran los océanos de forma global. Macrorhynchia philippina es un hidrozoo colonial de tamaño grande y naturaleza invasora. Para tener un mejor conocimiento del proceso de colonización es fundamental describir los patrones ecológicos a escalas de variación temporal y espacial. En este estudio, describimos el proceso de colonización por M. Philippina en una isla oceánica (Gran Canaria, Islas Canarias, Atlántico oriental). Se describen los patrones de abundancia y estructura de tallas de M. Philippina en tres hábitats costeros: arrecifes rocosos, praderas de fanerógamas marinas y fondos de rodolitos, antes (2014), durante (2016) y después (2017) de la explosión demográfica de la especie. Sobre arrecifes rocosos y en fondos de rodolitos, la abundancia de las colonias se incrementó drásticamente en 2017 con relación a 2014, e.g. desde 0 hasta 138 colonias/100 m2; este incremento fue menor en las praderas de fanerógamas marinas. En las praderas marinas, la longitud de las colonias fue más pequeña que sobre arrecifes rocosos y fondos de rodolitos. Consecuentemente, la colonización rápida por M. Philippina demuestra su plasticidad ecológica para colonizar diferentes tipos de hábitats costeros, aunque con diferente éxito.
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- 2020
- Full Text
- View/download PDF
30. Seagrass Cymodocea nodosa across biogeographical regions and times: Differences in abundance, meadow structure and sexual reproduction
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Universidad de Alicante. Departamento de Ciencias del Mar y Biología Aplicada, Máñez-Crespo, Julia, Tuya, Fernando, Fernández-Torquemada, Yolanda, Royo, Laura, Del-Pilar-Ruso, Yoana, Espino, Fernando, Manent, Pablo, Antich, Laura, Castejón, Inés, Curbelo, Leticia, de-la-Ossa-Carretero, Jose Antonio, Hernan, Gema, Mateo-Ramírez, Ángel, Pereda-Briones, Laura, Jiménez-Ramos, Rocío, Egea, Luis G., Procaccini, Gabriele, Terrados, Jorge, Tomas, Fiona, Universidad de Alicante. Departamento de Ciencias del Mar y Biología Aplicada, Máñez-Crespo, Julia, Tuya, Fernando, Fernández-Torquemada, Yolanda, Royo, Laura, Del-Pilar-Ruso, Yoana, Espino, Fernando, Manent, Pablo, Antich, Laura, Castejón, Inés, Curbelo, Leticia, de-la-Ossa-Carretero, Jose Antonio, Hernan, Gema, Mateo-Ramírez, Ángel, Pereda-Briones, Laura, Jiménez-Ramos, Rocío, Egea, Luis G., Procaccini, Gabriele, Terrados, Jorge, and Tomas, Fiona
- Abstract
Seagrasses are key habitat-forming species of coastal areas. While previous research has demonstrated considerable small-scale variation in seagrass abundance and structure, studies teasing apart local from large-scale variation are scarce. We determined how different biogeographic scenarios, under varying environmental and genetic variation, explained variation in the abundance and structure (morphology and biomass allocation), epiphytes and sexual reproduction intensity of the seagrass Cymodocea nodosa. Regional and local-scale variation, including their temporal variability, contributed to differentially explain variation in seagrass attributes. Structural, in particular morphological, attributes of the seagrass leaf canopy, most evidenced regional seasonal variation. Allocation to belowground tissues was, however, mainly driven by local-scale variation. High seed densities were observed in meadows of large genetic diversity, indicative of sexual success, which likely resulted from the different evolutionary histories undergone by the seagrass at each region. Our results highlight that phenotypic plasticity to local and regional environments need to be considered to better manage and preserve seagrass meadows.
- Published
- 2020
31. Seagrass Cymodocea nodosa across biogeographical regions and times: Differences in abundance, meadow structure and sexual reproduction
- Author
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Universidad de Los Lagos, Ministerio de Economía y Competitividad (España), Máñez-Crespo, Julia, Tuya, Fernando, Fernández-Torquemada, Yolanda, Royo, Laura, Pilar-Ruso, Yoana del, Espino, Fernando, Manent, Pablo, Antich, Laura, Castejón-Silvo, Inés, Curbelo, Leticia, Ossa, José A. de la, Hernán, Gema, Mateo, Miguel Ángel, Pereda-Briones, Laura, Jiménez-Ramos, Rocío, Egea, Luis G., Procaccini, Gabriele, Terrados, Jorge, Tomàs, Fiona, Universidad de Los Lagos, Ministerio de Economía y Competitividad (España), Máñez-Crespo, Julia, Tuya, Fernando, Fernández-Torquemada, Yolanda, Royo, Laura, Pilar-Ruso, Yoana del, Espino, Fernando, Manent, Pablo, Antich, Laura, Castejón-Silvo, Inés, Curbelo, Leticia, Ossa, José A. de la, Hernán, Gema, Mateo, Miguel Ángel, Pereda-Briones, Laura, Jiménez-Ramos, Rocío, Egea, Luis G., Procaccini, Gabriele, Terrados, Jorge, and Tomàs, Fiona
- Abstract
Seagrasses are key habitat-forming species of coastal areas. While previous research has demonstrated considerable small-scale variation in seagrass abundance and structure, studies teasing apart local from large-scale variation are scarce. We determined how different biogeographic scenarios, under varying environmental and genetic variation, explained variation in the abundance and structure (morphology and biomass allocation), epiphytes and sexual reproduction intensity of the seagrass Cymodocea nodosa. Regional and local-scale variation, including their temporal variability, contributed to differentially explain variation in seagrass attributes. Structural, in particular morphological, attributes of the seagrass leaf canopy, most evidenced regional seasonal variation. Allocation to belowground tissues was, however, mainly driven by local-scale variation. High seed densities were observed in meadows of large genetic diversity, indicative of sexual success, which likely resulted from the different evolutionary histories undergone by the seagrass at each region. Our results highlight that phenotypic plasticity to local and regional environments need to be considered to better manage and preserve seagrass meadows.
- Published
- 2020
32. Testing Side-Scan Sonar and Multibeam Echosounder to Study Black Coral Gardens: A Case Study from Macaronesia
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Czechowska, Karolina, primary, Feldens, Peter, additional, Tuya, Fernando, additional, Cosme de Esteban, Marcial, additional, Espino, Fernando, additional, Haroun, Ricardo, additional, Schönke, Mischa, additional, and Otero-Ferrer, Francisco, additional
- Published
- 2020
- Full Text
- View/download PDF
33. Widespread demographic explosion of a non-indigenous hydrozoan on an oceanic island
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Espino, Fernando, primary, Otero-Ferrer, Francisco J., additional, Bosch, Néstor E., additional, Coca, Josep, additional, Haroun, Ricardo, additional, and Tuya, Fernando, additional
- Published
- 2020
- Full Text
- View/download PDF
34. Geographical Range Extension of the Spotfin burrfish, Chilomycterus reticulatus (L. 1758), in the Canary Islands: A Response to Ocean Warming?
- Author
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Espino, Fernando, primary, Tuya, Fernando, additional, del Rosario, Armando, additional, Bosch, Néstor E., additional, Coca, Josep, additional, González-Ramos, Antonio J., additional, del Rosario, Francisco, additional, Otero-Ferrer, Francisco J., additional, Moreno, Ángel C., additional, and Haroun, Ricardo, additional
- Published
- 2019
- Full Text
- View/download PDF
35. Biogeographical scenarios modulate seagrass resistance to small-scale perturbations
- Author
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Ministerio de Economía y Competitividad (España), Tuya, Fernando, Fernández-Torquemada, Yolanda, Zarcero, Jesús, Pilar-Ruso, Yoana del, Csenteri, Ina, Espino, Fernando, Manent, Pablo, Curbelo, Leticia, Antich, Adrià, Ossa, José A. de la, Royo, Laura, Castejón-Silvo, Inés, Procaccini, Gabriele, Terrados, Jorge, Tomàs, Fiona, Ministerio de Economía y Competitividad (España), Tuya, Fernando, Fernández-Torquemada, Yolanda, Zarcero, Jesús, Pilar-Ruso, Yoana del, Csenteri, Ina, Espino, Fernando, Manent, Pablo, Curbelo, Leticia, Antich, Adrià, Ossa, José A. de la, Royo, Laura, Castejón-Silvo, Inés, Procaccini, Gabriele, Terrados, Jorge, and Tomàs, Fiona
- Abstract
Seagrasses constitute a key coastal habitat world-wide, but are exposed to multiple perturbations. Understanding elements affecting seagrass resistance to disturbances is critical for conservation. Distinct biogeographical scenarios are intrinsically linked with varying ecological and evolution backgrounds shaped across millennia. We addressed whether the resistance (change in shoot abundances) and performance (change in leaf morphology and growth) of the seagrass Cymodocea nodosa to a local stressor, light reduction, varied across three regions (Southeast Iberia, the Balearic Sea, and the Canaries) within the temperate northern Atlantic realm. We hypothesized that distinct biogeographical scenarios, in terms of distinct ecological/environmental conditions and genetic diversity of meadows, would affect seagrass resistance and performance, with flow-on effects on associated epifauna. The same experiments, in terms of shading intensities, timing and duration, were replicated at three seagrass meadows within each region. Results demonstrated inter-regional variation in the resistance and performance of C. nodosa. Under moderate and high shading, shoot abundance was abruptly decreased, relative to controls, in the Canaries with concurrent, but less accentuated, changes in leaf morphology and no changes in growth. In the other two regions, however, moderate and high shading had a negligible effect on shoot abundance, leaf morphology, and growth. Shading had no overall effect over the total abundance and assemblage structure of epifauna; these faunal attributes, however, varied between regions. Low seagrass resistance at the Canaries is linked with the peripheral distribution of the species there, favouring isolation and decreased genetic diversity. Synthesis. Different biogeographical scenarios shape seagrass resistance to local perturbations. From a conservation perspective, if resistance differs among biogeographical scenarios, universal conservation rules for seagrass
- Published
- 2019
36. La recaudación tributaria y los servicios de seguridad ciudadana en el distrito de San Martín de Porres, año 2017
- Author
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Yong Espino, Fernando Wilder and Alarcón Díaz, Mitchell Alberto
- Subjects
Recursos directamente recaudados ,Servicios de seguridad ciudadana ,Servicios esenciales ,Servicios de apoyo ,Recaudación tributaria - Abstract
El objetivo del estudio fue determinar la relación entre la recaudación tributaria y los servicios de seguridad ciudadana en el distrito de San Martín de Porres, año 2017; la metodología empleada fue descriptiva correlacional. La población estuvo conformada por 726,538 habitantes (según INEI). La muestra tras la aplicación de la fórmula estadística fue de 384 habitantes del distrito de San Martín de Porres, con un nivel de confianza del 95%. Los datos fueron recogidos con una encuesta cuyo instrumento fue el cuestionario. La información fue procesada estadísticamente haciendo uso del Software Spss, se obtuvo como principal conclusión que la recaudación tributaria se relaciona significativamente con los servicios de seguridad ciudadana en el distrito de San Martín de Porres, año 2017 (Rho de Spearman 0,998, p=0,000 < 0,05). Lima Norte Escuela de Posgrado Planificación y Control Financiero
- Published
- 2018
37. Disentangling latitudinal diversity gradients in Taxonomic, Phylogenetic, and Functional diversity of Atlantic reef fishes
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Bosch, Nestor, primary, Wernberg, Thomas, additional, Langlois, Timothy, additional, Smale, Dan, additional, Moore, Pippa, additional, Franco, João, additional, Thiriet, Pierre, additional, Feunteun, Eric, additional, Ribeiro, Claudia, additional, Neves, Pedro, additional, Freitas, Rui, additional, Filbee-Dexter, Karen, additional, Norderhaug, Kjell Magnus, additional, Garcia Lazzati, Alvaro, additional, Otero-Ferrer, Francisco, additional, Espino, Fernando, additional, Haroun, Ricardo, additional, and Tuya, Fernando, additional
- Published
- 2019
- Full Text
- View/download PDF
38. Massive decline of Cystoseira abies-marina forests in Gran Canaria Island (Canary Islands, eastern Atlantic)
- Author
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Valdazo, José, Viera-Rodríguez, M. Ascensión, Espino, Fernando, Haroun, Ricardo, Tuya, Fernando, and University of Las Palmas
- Subjects
bosques marinos ,especies formadoras de hábitats ,presiones humanas ,Fucales ,regresión ,Océano Atlántico ,marine forests ,habitat-forming species ,human pressures ,regression ,Atlantic Ocean - Abstract
Brown macroalgae within the genus Cystoseira are some of the most relevant “ecosystem-engineers” found throughout the Mediterranean and the adjacent Atlantic coasts. Cystoseira-dominated assemblages are sensitive to anthropogenic pressures, and historical declines have been reported from some regions. In particular, Cystoseira abies-marina, thriving on shallow rocky shores, is a key species for the ecosystems of the Canary Islands. In this work, we analyse changes in the distribution and extension of C. abies-marina in the last decades on the island of Gran Canaria. This alga dominated the shallow rocky shores of the entire island in the 1980s; a continuous belt extended along 120.5 km of the coastline and occupied 928 ha. In the first decade of the 21st century, fragmented populations were found along 52.2 km of the coastline and occupied 12.6 ha. Today, this species is found along 37.8 km of the coastline and occupies only 7.4 ha, mainly as scattered patches. This regression has been drastic around the whole island, even in areas with low anthropogenic pressure; the magnitude of the decline over time and the intensity of local human impacts have not shown a significant correlation. This study highlights a real need to implement conservation and restoration policies for C. abies-marina in this region., Las algas pardas pertenecientes al género Cystoseira se distribuyen a lo largo del Mediterráneo y las costas atlánticas adyacentes, siendo uno de los “ingenieros ecosistémicos” más relevantes. Los bosques constituidos por especies de Cystoseira son sensibles a perturbaciones de origen antropogénico y, por esta razón, se han registrado declives históricos en distintas regiones. Concretamente, Cystoseira abies-marina, una especie que habita en costas rocosas someras, es clave para la buena salud de los ecosistemas costeros de las Islas Canarias. En este trabajo, analizamos los cambios en la distribución y extensión de C. abies-marina en las últimas 4 décadas en la isla de Gran Canaria. Esta especie dominaba las costas rocosas poco profundas de toda la isla en la década de los 80; una banda continua se extendía a lo largo de 120.5 km de costa, ocupando 928 ha. A comienzos del siglo XXI, poblaciones fragmentadas cubrían 12.6 ha, a lo largo de 52.2 km de la línea de costa. Hoy en día, se distribuye a lo largo de 37.8 km del perímetro costero, en su mayoría como parches dispersos, ocupando una extensión de tan sólo 7.4 ha. Esta regresión ha sido drástica en toda la isla, incluso en zonas con baja presión antropogénica; no encontramos una correlación significativa entre el número de impactos locales y la magnitud del declive en el tiempo. Este estudio señala la necesidad real de implementar políticas de conservación y restauración para C. abies-marina en esta región.
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- 2017
- Full Text
- View/download PDF
39. Biogeographical scenarios modulate seagrass resistance to small‐scale perturbations
- Author
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Tuya, Fernando, primary, Fernández‐Torquemada, Yolanda, additional, Zarcero, Jesús, additional, del Pilar‐Ruso, Yoana, additional, Csenteri, Ina, additional, Espino, Fernando, additional, Manent, Pablo, additional, Curbelo, Leticia, additional, Antich, Adriá, additional, de la Ossa, José A., additional, Royo, Laura, additional, Castejón, Inés, additional, Procaccini, Gabriele, additional, Terrados, Jorge, additional, and Tomas, Fiona, additional
- Published
- 2018
- Full Text
- View/download PDF
40. Biogeographical scenarios modulate seagrass resistance to small‐scale perturbations
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Universidad de Alicante. Departamento de Ciencias del Mar y Biología Aplicada, Tuya, Fernando, Fernández-Torquemada, Yolanda, Zarcero, Jesús, Del-Pilar-Ruso, Yoana, Csenteri, Ina, Espino, Fernando, Manent, Pablo, Curbelo, Leticia, Antich, Adriá, de-la-Ossa-Carretero, Jose Antonio, Royo, Laura, Castejón, Inés, Procaccini, Gabriele, Terrados, Jorge, Tomas, Fiona, Universidad de Alicante. Departamento de Ciencias del Mar y Biología Aplicada, Tuya, Fernando, Fernández-Torquemada, Yolanda, Zarcero, Jesús, Del-Pilar-Ruso, Yoana, Csenteri, Ina, Espino, Fernando, Manent, Pablo, Curbelo, Leticia, Antich, Adriá, de-la-Ossa-Carretero, Jose Antonio, Royo, Laura, Castejón, Inés, Procaccini, Gabriele, Terrados, Jorge, and Tomas, Fiona
- Abstract
1. Seagrasses constitute a key coastal habitat worldwide, but are exposed to multiple perturbations. Understanding elements affecting seagrass resistance to disturbances is critical for conservation. Distinct biogeographical scenarios are intrinsically linked with varying ecological and evolution backgrounds shaped across millennia. 2.We addressed whether the resistance (change in shoot abundances) and performance (change in leaf morphology and growth) of the seagrass Cymodocea nodosa to a local stressor, light reduction, varied across three regions (Southeast Iberia, the Balearic Sea and the Canaries) within the temperate northern Atlantic realm. We hypothesized that distinct biogeographical scenarios, in terms of distinct ecological/environmental conditions and genetic diversity of meadows, would affect seagrass resistance and performance, with flow‐on effects on associated epifauna. The same experiments, in terms of shading intensities, timing and duration, were replicated at three seagrass meadows within each region. 3.Results demonstrated inter‐regional variation in the resistance and performance of C. nodosa. Under moderate and high shading, shoot abundance was abruptly decreased, relative to controls, in the Canaries with concurrent, but less accentuated, changes in leaf morphology and no changes in growth. In the other two regions, however, moderate and high shading had a negligible effect on shoot abundance, leaf morphology and growth. Shading had no overall effect over the total abundance and assemblage structure of epifauna; these faunal attributes, however, varied between regions. Low seagrass resistance at the Canaries is linked with the peripheral distribution of the species there, favoring isolation and decreased genetic diversity. 4.Synthesis Different biogeographical scenarios shape seagrass resistance to local perturbations. From a conservation perspective, if resistance differs among biogeographical scenarios, universal conservation rules for seag, 1. Las angiospermas marinas constituyen un hábitat prioritario globalmente, pero están expuestas a múltiples perturbaciones. Comprender qué elementos afectan su resistencia a impactos es crítico para la conservación. Distintos escenarios biogeográficos están vinculados con distintos contextos ecológicos y evolutivos modulados durante milenios. 2. Evaluamos si la resistencia (cambio en abundancias de haces) y funcionamiento (cambio en la morfología foliar y crecimiento) de la angiosperma marina Cymodocea nodosa a un estresante local, reducción luminosa, varió entre tres regiones (sudoeste de la Península Ibérica, Mar Balear e Islas Canarias) en el Atlántico norte. Nuestra hipótesis es que distintos escenarios biogeográficos, en cuanto a distintas condiciones ecológicas/ambientales, así como de diversidad genética de las praderas, afectaría la resistencia y funcionamiento de la angiosperma, con efectos sobre la epifauna asociada. Los mismos experimentos, en términos de intensidad de sombreado, tiempo y duración, se replicaron en tres praderas de cada región. 3. Los resultados demostraron variación entre regiones en la resistencia y funcionamiento de C. nodosa. Bajo sombreado moderado e intenso, la abundancia de haces decreció abruptamente, en relación con controles, en Canarias, con cambios menos acentuados en la morfología foliar y ausentes para el crecimiento. En las otras dos regiones, sin embargo, el sombreado moderado e intenso tuvieron un efecto despreciable sobre la abundancia de haces, morfología foliar y crecimiento. El sombreado no tuvo efecto sobre la abundancia total y estructura multivariante de la epifauna, que variaron no obstante entre regiones. La baja resistencia en Canarias se vincula con la distribución periférica de la especie allí, lo que favorece el aislamiento y una diversidad genética baja. 4. Síntesis. Diferentes escenarios biogeográficos afectan la resistencia de la angiosperma a perturbaciones locales. Desde una perspectiva de conservación
- Published
- 2018
41. Population structure of the pearly razorfish, Xyrichtys novacula (Actinopterygii: Labridae), in sand-seagrass mosaics: spatial variation according to habitat features and sampling techniques
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Espino, Fernando, Triay-Portella, Raül, González, José Antonio, Haroun, Ricardo, Tuya, Fernando, and Government of the Canary Islands
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habitat ,structural complexity ,soft bottoms ,sediments ,sex ratio ,hábitat ,complejidad estructural ,fondos blandos ,sedimentos - Abstract
Habitat structure affects the distribution of fishes, particularly across reef-dominated habitats, but few studies have connected patterns in the abundance of soft-bottom fishes with the structure of the habitat. The spatial and temporal patterns of variation in the abundance, biomass and population structure of the pearly razorfish, Xyrichtys novacula, inhabiting sand-Cymodocea nodosa seagrass mosaics were described through two complementary techniques: underwater visual counts and seine nets. We sought to analyse whether biotic (seagrass shoot density, leaf length and meadow cover) and abiotic (sediment composition and particle size) structural elements explained variation in patterns of abundance and biomass. Underwater visual counts registered a larger abundance of individuals and proved significant variation in fish abundance and biomass at the scale of locations, which was otherwise not detected through seine nets. Seasonal variation in fish abundance and biomass was, in all cases, minor. Habitat structural elements helped to explain patterns in fish abundance and biomass. This fish species was particularly abundant in sediments dominated by coarse sands in continuous meadows of C. nodosa ( > 90% seagrass cover) with intermediate densities of 500 to 1000 shoots m–2, followed by large-sized seagrass patches with >1000 shoots m–2. A trade-off between protection provided by seagrass canopies and protection derived from its burial behaviour, limited under high seagrass shoot densities, may explain spatial variation patterns., La estructura del hábitat afecta a la distribución de los peces, particularmente en los hábitats dominados por arrecifes. Sin embargo, los estudios que conectan patrones de abundancia de peces en fondos blandos con la estructura del hábitat son, comparativamente, más escasos. En este estudio, se describen los patrones espacio-temporales de variación en abundancia, biomasa y estructura poblacional del ‘pejepeine’, Xyrichtys novacula, en hábitats de arena y praderas de fanerógamas marinas constituidas por Cymodocea nodosa, empleando dos técnicas complementarias: censos visuales subacuáticos (UVCs) y arrastres (SNs). Se analizó si los elementos estructurales bióticos (densidad de pies, longitud de hoja y cobertura de la pradera) y abióticos (composición del sedimento y tamaño de las partículas) contribuyen a explicar la variación en los patrones de abundancia y biomasa. Los UVCs registraron una mayor abundancia de individuos y demostraron una variación significativa en abundancia y biomasa a escala de localidades, estas variaciones no fueron detectadas por los arrastres. La variación estacional en la abundancia y biomasa de individuos fue mínima en todos los casos. Los elementos estructurales del hábitat contribuyen a explicar los patrones de abundancia y biomasa de peces. Esta especie fue particularmente abundante en fondos dominados por arenas gruesas con praderas continuas de C. nodosa (cobertura > 90%) con densidades de pies intermedias de 500 < nº de pies m–2 < 1000, seguido por parches de fanerógamas de tamaño grande con densidades >1000 pies m–2. Un equilibrio entre la protección provista por la bóveda foliar y la protección derivada de su comportamiento de enterramiento, el cual está limitado por densidades de pies altas, puede explicar los patrones de variabilidad espacial de esta especie.
- Published
- 2015
- Full Text
- View/download PDF
42. Trends of the seagrass Cymodocea nodosa (Magnoliophyta) in the Canary Islands: population changes in the last two decades
- Author
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Fabbri, Federico, Espino, Fernando, Herrera, Rogelio, Moro, Leopoldo, Haroun, Ricardo, Riera, Rodrigo, González-Henriquez, Nieves, Bergasa, Oscar, Monterroso, Oscar, Ruiz de la Rosa, Manuel, and Tuya, Fernando
- Subjects
seagrass ,population trend ,temporal patterns ,change rates ,Canary Islands ,Atlantic Ocean ,fanerógamas marinas ,tendencia poblacional ,patrones temporales ,tasa de cambio ,islas Canarias ,Océano Atlántico - Abstract
Seagrass meadows perform essential ecosystem functions and services. Though the meadows are globally deteriorating, numerous regressions remain unreported as a result of data fragmentation. Cymodocea nodosa is the most important seagrass in shallow coastal waters of the Canary Islands. No study has so far investigated temporal population trends at the entire archipelago scale. Using data collected in the past 23 years by local companies, public authorities and research groups, the population trends of Cymodocea nodosa were analysed over the past two decades at the scales of islands, island sectors and meadows. During this period, a prevalence of negative trends was revealed for three seagrass demographic descriptors (seagrass shoot density, coverage and leaf length) at the three scales, evidencing an overall deterioration in seagrass meadow integrity. These results suggest the need to develop correct management strategies to guarantee the conservation of this seagrass and the meadows it creates., Las praderas de fanerógamas marinas suministran funciones y servicios esenciales para los ecosistemas. A pesar de que dichas praderas están globalmente deteriorándose, numerosas regresiones son aún desconocidas como resultado de la falta de datos. Cymodocea nodosa es la fanerógama marina más importante en aguas someras de las costas del Archipiélago Canario. No obstante, ningún estudio ha analizado las tendencias temporales de sus poblaciones a escala de todo el archipiélago. Utilizando datos recogidos durante los últimos 23 años por empresas, administraciones públicas y grupos de investigación, se analizaron las tendencias de las poblaciones de Cymodocea nodosa durante las últimas dos décadas en el Archipiélago Canario a la escala de islas, sectores insulares y praderas individuales. A lo largo de este periodo, se observa una prevalencia de tendencias negativas para tres descriptores demográficos (densidad de haces, cobertura y longitud de hoja), evidenciando un deterioro general en la integridad de las praderas. Estos resultados sugieren la necesidad de desarrollar estrategias de gestión correctas para garantizar la conservación de las praderas constituidas por esta planta marina.
- Published
- 2015
- Full Text
- View/download PDF
43. Epigenetic basis of alcoholism
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Peris Espino, Fernando, Universitat Autònoma de Barcelona. Facultat de Biociències, and Parés i Casasampera, Xavier
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Alcoholism ,Alcoholisme ,Epigenetics ,Epigenètica - Published
- 2015
44. Biogeographical scenarios modulate seagrass resistance to small‐scale perturbations.
- Author
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Smale, Dan, Tuya, Fernando, Zarcero, Jesús, Csenteri, Ina, Espino, Fernando, Manent, Pablo, Curbelo, Leticia, Fernández‐Torquemada, Yolanda, del Pilar‐Ruso, Yoana, de la Ossa, José A., Antich, Adriá, Royo, Laura, Castejón, Inés, Terrados, Jorge, Tomas, Fiona, and Procaccini, Gabriele
- Subjects
BIOGEOGRAPHY ,SEAGRASSES ,PERTURBATION theory ,CONSERVATION & restoration ,ECOLOGY - Abstract
Copyright of Journal of Ecology is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2019
- Full Text
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45. Evaluación, gestión y conservación de praderas de fanerógamas marinas en la isla de Gran Canaria, Islas Canarias
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Espino, Fernando, Haroun, R., Tuya, F., and Facultad de Ciencias del Mar
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241705 Biología marina - Abstract
Máster Oficial en Gestión Costera [ES] Las praderas de fanerógamas marinas constituyen uno de los ecosistemas más importantes en muchas zonas costeras del mundo. Desempeñan múltiples e importantes funciones ecológicas y proveen bienes y servicios a los seres humanos. Sin embargo, estos ecosistemas están sufriendo una regresión a escala global, provocada por las actividades que los seres humanos realizan en las costas. En este trabajo, se realiza una comparación en la estructura de 21 praderas de Cymodocea nodosa en la isla de Gran Canaria entre los años 2003 y 2012. También se realizó un análisis de la posible influencia de los factores de origen natural y antropogénicos que pudieran explicar la evolución estructural observada en las praderas; así como de la influencia de la proximidad y tipos de impactos sobre la evolución de los parámetros estructurales. Se realizó un diagnóstico y un pronóstico sobre el estado de conservación de las praderas. Por último, se propone una estrategia de gestión y conservación para este ecosistema. Los resultados mostraron que la comparación realizada en la estructura de las 21 praderas, estudiadas entre 2003 y 2012, mostró una regresión general del ecosistema en la isla; 11 praderas han sufrido una clara regresión en su estructura y superficie, mientras que 10 praderas permanecen aparentemente estables. Tras la revisión de otros estudios, se constata que de las 39 praderas citadas en los trabajos existentes sobre C. nodosa en Gran Canaria, un 48,71% se encuentran en estado regresivo, 33,33% en estado aparentemente estable y de un 17,94% no existen datos. Las praderas han pasado de ocupar ca. 6.145.947 m2 entre los años 2003 y 2006 a ca. 1.732.270 m2 en el año 2012, lo que representa una pérdida aproximada de un 71,82% de su superficie, de acuerdo con los estudios cartográficos analizados. Los factores que subyacen detrás de esta regresión parecen ser de origen antropogénico, más que factores de origen natural. La proximidad y características de las alteraciones antropogénicas juegan un papel determinante en la explicación de la evolución de las praderas de C. nodosa en Gran Canaria. El diagnóstico realizado indica que este ecosistema se encuentra amenazado en las costas de Gran Canaria; en el caso de continuar con el actual modelo de desarrollo en la isla y si no se aplican medidas específicas de protección-conservación, cabe esperar una regresión aún mayor en el futuro, con desaparición de más poblaciones. Las medidas de gestión-conservación propuestas en este trabajo se consideran viables, desde el punto de vista de su aplicación por la Administración y muchas de ellas no conllevarían un gasto económico adicional. Tan solo se trataría de reorientar recursos humanos y económicos; además de aplicar de forma rápida y eficiente la legislación ya existente.
- Published
- 2014
46. Photo-physiological performance and short-term acclimation of two coexisting macrophytes (Cymodocea nodosa and Caulerpa prolifera) with depth
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Tuya, Fernando, primary, Betancor, Séfora, additional, Fabbri, Federico, additional, Espino, Fernando, additional, and Haroun, Ricardo, additional
- Published
- 2016
- Full Text
- View/download PDF
47. Variabilidad espacial en la estructura de la ictiofauna asociada a praderas de Cymodocea nodosa en las Islas Canarias, Atlántico nororiental subtropical
- Author
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Espino, Fernando, Tuya, Fernando, Brito, Alberto, and Haroun, Ricardo
- Subjects
Abundance ,Abundancia ,juvenile fish ,habitat structure ,guardería ,estructura del hábitat ,nursery ,seagrass meadows ,peces juveniles ,praderas marinas - Abstract
El conocimiento de los patrones de variabilidad espacial de las comunidades de peces es de especial relevancia para una adecuada gestión de estos recursos marinos. Con el objetivo de: (i) analizar la variabilidad espacial en la estructura (riqueza, abundancia y diversidad) de la ictiofauna asociada a praderas marinas de Cymodocea nodosa en el Archipiélago Canario y (ii) conocer cómo la complejidad estructural de este hábitat afecta a la comunidad de peces, se realizaron 36 arrastres en seis praderas (separadas por 10 km) en tres islas (separadas por 100 km). Se registraron un total de 3.616 individuos pertenecientes a 30 especies y 15 familias. La longitud total de ca. 95% de los individuos fue < 10 cm y ca. 90% fueron juveniles. La variabilidad espacial en la estructura de la comunidad asociada a escala de praderas fue superior que a escala de islas (27,28% vs. 6,64% de la variabilidad total); la menor escala (e.g., variabilidad entre arrastres dentro de cada pradera), acumuló la mayor parte de la variabilidad (66,07%). Las diferencias en la estructura de la comunidad entre praderas se debieron a cambios en la abundancia de determinadas especies, como Diplodus annularis, Spondyliosoma cantharus, Mullus surmuletus y Symphodus trutta, que usan las praderas como lugares de reclutamiento, confirmando el papel de guardería que juega este hábitat en Canarias. La densidad media de pies y la variación en la altura del estrato foliar fueron los parámetros estructurales que más afectaron la estructura de la comunidad de ictiofauna. A description of the patterns in spatial variability of fish assemblages is particularly relevant to guarantee an adequate management of these marine resources. Thirty six trawls were considered on six seagrass meadows (10 km apart) in three islands (100 km apart) of the Canary Islands to (i) analyze the spatial variability in the structure (richness, abundance and diversity) of fish assemblages associated with Cymodocea nodosa seagrass meadows, and to (ii) assess how the structural complexity of this habitat affects fish assemblage structure. A total of 3,616 fishes were captured, belonging to 30 species and 15 families. The total length of ca. 95% of individuals was < 10 cm, and ca. 90% of individuals were juveniles. Spatial variability in fish assemblage structure was larger when considering the scale of meadows than the scale of islands (27.28% vs. 6.64% respectively, in the amount of explained total variability); the smallest spatial scale (i.e., the variability among replicated trawls within each seagrass meadow) accumulated the largest amount of variability (66.07%). Differences in fish assemblage structure were largely driven by changes in the abundance of a few species, including Diplodus annularis, Spondyliosoma cantharus, Mullus surmuletus and Symphodus trutta. These species recruited into seagrass meadows, and confirmed the nursery role of this habitat in the canarian coastal waters. Mean shoot density and variation of the seagrass canopy height were the descriptors that accounted for the most variability when explaining patterns in fish assemblage structure.
- Published
- 2011
48. Trends of the seagrass Cymodocea nodosa (Magnoliophyta) in the Canary Islands: population changes in the last two decades
- Author
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Tuya, Fernando, primary, Fabbri, Federico, additional, Espino, Fernando, additional, Herrera, Rogelio, additional, Moro, Leopoldo, additional, Haroun, Ricardo, additional, Riera, Rodrigo, additional, González-Henriquez, Nieves, additional, Bergasa, Oscar, additional, Monterroso, Oscar, additional, and Ruiz de la Rosa, Manuel, additional
- Published
- 2015
- Full Text
- View/download PDF
49. L'energia solar a Cerdanyola del Vallès
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Garcia Pelàez, Carlos, Peris Espino, Fernando, Vallmanya Poch, David, Agència de Gestió d'Ajuts Universitaris i de Recerca, and Cilleros Jellinek, Ana
- Subjects
620 - Assaig de materials. Materials comercials. Economia de l'energia ,Energia solar -- Utilització - Abstract
Treball de recerca realitzat per alumnes d'ensenyament secundari i guardonat amb un Premi CIRIT per fomentar l'esperit científic del Jovent l'any 2009. Aquest treball intenta resoldre la qüestió de si l'energia solar arribarà a ser una energia alternativa que esdevingui un substitut del petroli en el futur. Aquest projecte informa de totes les característiques i propietats de les plaques solars, explicant els avantatges que fan que sigui un recurs energètic molt net, segur i, encara que en un principi es pugui veure car, finalment arriba a amortitzar el preu inicial fins aconseguir un estalvi monetari, que és el que atreu al màxim de compradors. El projecte parla de les característiques de les plaques solars fotovoltaiques explicant així tots els materials pels quals és formada, la seva estructura per capes i el procés de transformació de llum en electricitat. Conté, també, una part pràctica extensa i elaborada: s'ha demanat a diversos ciutadans, sobretot de Cerdanyola del Vallès i també de Barcelona, sobre el tipus de contacte que tenen amb aquesta energia renovable i si no és així, saber quin altre tipus de font energètica utilitzen. També conté una entrevista a un professional del món de l'energia solar. I, finalment, s'ha realitzat el disseny, muntatge i funcionament d'un cotxe elèctric solar. Research project carried out by pupils of secondary education and rewarded with a Prize CIRIT to foster the scientific spirit of the Youth in year 2009. This Research Project is a work that tries to resolve the question of if the solar energy will become an alternative energy in a world without oil. This project reports the characteristics and properties of the solar panels, explaining the advantages that make it a very clean energy resource and safe and although firstly it can be expensive, finally you can win the money that you had spent in your solar panels. The project discusses the characteristics of the photovoltaic solar panel and explains all the materials of them, the layered structure and the transformation of the light into electricity. It contains also an elaborate and extensive practice: several people were asked, especially of the city Cerdanyola del Vallès and also people of Barcelona, about the type of contact they have with renewable energy. It contains an interview to a professional in the world of the solar energy. And, finally, it is done a design, installation and operation of a solar electric car to show the solar energy in an easy and practical way.
- Published
- 2010
50. Preservation of seagrass clonal integration buffers against burial stress
- Author
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Tuya, Fernando, Espino, Fernando, Terrados, Jorge, Tuya, Fernando, Espino, Fernando, and Terrados, Jorge
- Abstract
The survivorship and performance of seagrasses are affected by environmental stressors, yet clonal integration of seagrasses can ameliorate these adverse environmental changes. We experimentally assessed the response of the seagrass Cymodocea nodosa (Ucria) Ascherson off Gran Canaria to changes in the intensity of burial, determining whether responses could be modulated by the clonal integration of the plant. Plants were buried in situ to 0 ('ambient'), 8 ('moderate') and 24. cm ('high') within PVC cylinders, which were left untouched or isolated from adjacent shoots by sawing their clonal connection. The number of living shoots under 'moderate' and 'high' burial scenarios declined with time when the clonal integration was severed. After 15. weeks, cores were harvested. The effect of burial over C. nodosa depended on whether the clonal integration was maintained or severed. When the clonal integration was maintained, the shoot density, the number of leaves, the above-ground biomass and the leaf length did not change significantly with burial levels. When the clonal integration was severed, the shoot density and the number of leaves were larger in cores under 'ambient' and 'moderate' than 'high' burial levels, the above-ground biomass was larger under 'ambient' than 'moderate' and 'high' burial levels, and the leaf length was larger in 'ambient' than in cores under 'high' burial. The below-ground biomass was not affected by burial and clonal integration. The internodal length of vertical rhizomes increased with burial; this increase was larger when the clonal integration was severed. In conclusion, preservation of the clonal integration of the seagrass C. nodosa buffered seagrass performance against small-scale burial events. © 2012 Elsevier B.V.
- Published
- 2013
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