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9. Seascape ecology: identifying research priorities for an emerging ocean sustainability science

Author

Pittman, S. J., Yates, K. L., Bouchet, P. J., Alvarez-berastegui, D., Andrefouet, S., Bell, S. S., Berkstrom, C., Bostrom, C., Brown, C. J., Connolly, R. M., Devillers, R., Eggleston, D., Gilby, B. L., Gullstrom, M., Halpern, B. S., Hidalgo, M., Holstein, D., Hovel, K., Huettmann, F., Jackson, E. L., James, W. R., Kellner, J. B., Kot, C. Y., Lecours, V, Lepczyk, C., Nagelkerken, I, Nelson, J., Olds, A. D., Santos, R. O., Scales, K. L., Schneider, D. C., Schilling, H. T., Simenstad, C., Suthers, I. M., Treml, E. A., Wedding, L. M., Yates, P., Young, M., Pittman, S. J., Yates, K. L., Bouchet, P. J., Alvarez-berastegui, D., Andrefouet, S., Bell, S. S., Berkstrom, C., Bostrom, C., Brown, C. J., Connolly, R. M., Devillers, R., Eggleston, D., Gilby, B. L., Gullstrom, M., Halpern, B. S., Hidalgo, M., Holstein, D., Hovel, K., Huettmann, F., Jackson, E. L., James, W. R., Kellner, J. B., Kot, C. Y., Lecours, V, Lepczyk, C., Nagelkerken, I, Nelson, J., Olds, A. D., Santos, R. O., Scales, K. L., Schneider, D. C., Schilling, H. T., Simenstad, C., Suthers, I. M., Treml, E. A., Wedding, L. M., Yates, P., and Young, M.

Abstract

Seascape ecology, the marine-centric counterpart to landscape ecology, is rapidly emerging as an interdisciplinary and spatially explicit ecological science with relevance to marine management, bio-diversity conservation, and restoration. While important progress in this field has been made in the past decade, there has been no coherent prioritisation of key research questions to help set the future research agenda for seascape ecology. We used a 2-stage modified Delphi method to solicit applied research questions from academic experts in seascape ecology and then asked respondents to identify priority questions across 9 interrelated research themes using 2 rounds of selection. We also invited senior management/conservation practitioners to prioritise the same research questions. Analyses highlighted congruence and discrepancies in perceived priorities for applied research. Themes related to both ecological concepts and management practice, and those identified as priorities include seascape change, seascape connectivity, spatial and temporal scale, ecosystem-based management, and emerging technologies and metrics. Highest-priority questions (upper tercile) received 50% agreement between respondent groups, and lowest priorities (lower tercile) received 58% agreement. Across all 3 priority tiers, 36 of the 55 questions were within a +/- 10% band of agreement. We present the most important applied research questions as determined by the proportion of votes received. For each theme, we provide a synthesis of the research challenges and the potential role of seascape ecology. These priority questions and themes serve as a roadmap for advancing applied seascape ecology during, and beyond, the UN Decade of Ocean Science for Sustainable Development (2021-2030).

Published
2021
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10. Seascape ecology: identifying research priorities for an emerging ocean sustainability science

Author

Pittman, SJ, Yates, KL, Bouchet, PJ, Alvarez-Berastegui, D, Andrefouet, S, Bell, SS, Berkstrom, C, Bostrom, C, Brown, CJ, Connolly, RM, Devillers, R, Eggleston, D, Gilby, BL, Gullstrom, M, Halpern, BS, Hidalgo, M, Holstein, D, Hovel, K, Huettmann, F, Jackson, EL, James, WR, Kellner, JB, Kot, CY, Lecours, V, Lepczyk, C, Nagelkerken, I, Nelson, J, Olds, AD, Santos, RO, Scales, KL, Schneider, DC, Schilling, HT, Simenstad, C, Suthers, IM, Treml, EA, Wedding, LM, Yates, P, Young, M, Pittman, SJ, Yates, KL, Bouchet, PJ, Alvarez-Berastegui, D, Andrefouet, S, Bell, SS, Berkstrom, C, Bostrom, C, Brown, CJ, Connolly, RM, Devillers, R, Eggleston, D, Gilby, BL, Gullstrom, M, Halpern, BS, Hidalgo, M, Holstein, D, Hovel, K, Huettmann, F, Jackson, EL, James, WR, Kellner, JB, Kot, CY, Lecours, V, Lepczyk, C, Nagelkerken, I, Nelson, J, Olds, AD, Santos, RO, Scales, KL, Schneider, DC, Schilling, HT, Simenstad, C, Suthers, IM, Treml, EA, Wedding, LM, Yates, P, and Young, M

Published
2021

11. Seascape ecology: identifying research priorities for an emerging ocean sustainability science

Author

Pittman, SJ, primary, Yates, KL, additional, Bouchet, PJ, additional, Alvarez-Berastegui, D, additional, Andréfouët, S, additional, Bell, SS, additional, Berkström, C, additional, Boström, C, additional, Brown, CJ, additional, Connolly, RM, additional, Devillers, R, additional, Eggleston, D, additional, Gilby, BL, additional, Gullström, M, additional, Halpern, BS, additional, Hidalgo, M, additional, Holstein, D, additional, Hovel, K, additional, Huettmann, F, additional, Jackson, EL, additional, James, WR, additional, Kellner, JB, additional, Kot, CY, additional, Lecours, V, additional, Lepczyk, C, additional, Nagelkerken, I, additional, Nelson, J, additional, Olds, AD, additional, Santos, RO, additional, Scales, KL, additional, Schneider, DC, additional, Schilling, HT, additional, Simenstad, C, additional, Suthers, IM, additional, Treml, EA, additional, Wedding, LM, additional, Yates, P, additional, and Young, M, additional

Published
2021
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12. The Mediterranean Sea Surface Exploration Tool, reference document and product user manual Version 1

Author

Alvarez-Berastegui, D., Frontera, B., Rotllan-García, P., Heslop, E., Fernandez, J.G., Tugores, M.P., Juza, M., and Tintoré, J.

Subjects
Data processing, Currents, Data analysis, Sea level
Abstract

The Mediterranean Surface Exploration tool (MSET) tool allows exploring various ocean variables providing information on the sea surface of the Western Mediterranean Sea. These variables include five key Essential Ocean Variables ( EOVs , Tanhua et al., 2019): temperature, salinity, sea level, chlorophyll-a and currents, and two additional variables, temperature and salinity fronts, derived from the EOVs. The information is obtained from the SOCIB Western Mediterranean Operational system ( WMOP , Juza et al., 2016; Mourre et al., 2018) and from satellite data provided by Copernicus Marine Service ( CMEMS ). Oceanographic features can be explored as layers or time series at specific points defined by the user when double-clicking the layer on display. This tool is aimed for a wide range of end users in the field fisheries sustainability, conservation and education. The implementation fully relies on Web Map Services (WMS). All data handled by the tool is publically available from the SOCIB and CMEMS data servers. EuroSea Published Current 14.a Sea surface height Sea surface temperature Subsurface temperature Surface currents Subsurface currents Sea surface salinity Subsurface salinity Multi-organisational Salinity fronts Chlorophyll a Method Specification of criteria

Published
2020

19. Challenges for Sustained Observing and Forecasting Systems in the Mediterranean Sea

Author

Emma Heslop, Javier Ruiz, François Galgani, Pablo Lorente, Ferial Louanchi, Pierre Testor, Susana Pérez Rubio, Romain Escudier, Alejandro Orfila, Roberto Bozzano, Georg Umgiesser, George Petihakis, Marc Torner, Sara Pensieri, Patrick Raimbault, George Zodiatis, Mélanie Juza, Patrick Farcy, Baris Salihoglu, David March, Simona Simoncelli, Daniel J. Hayes, Simón Ruiz, Paolo Lazzari, Giorgia Verri, Francesco Trotta, Loic Petit De La Villeon, Emanuela Clementi, Benjamín Casas, Joaquín Tintoré, D. Obaton, Constantin Frangoulis, Marco Bajo, Miguel Charcos-Llorens, Gianandrea Mannarini, Antonio Sánchez-Román, Vlado Malačič, Patricia Reglero, Edgar G. Pavia, Elena Mauri, Juan Gabriel Fernández, Rosalia Santoleri, Paz Rotllan, Svitlana Liubartseva, Toste Tanhua, Sylvie Pouliquen, Laurent Coppola, Gianpiero Cossarini, Leonidas Perivoliotis, Bruno Buongiorno Nardelli, Cristian Munoz-Mas, Diego Álvarez-Berastegui, Laurent Mortier, Antonio Novellino, Isaac Gertman, Luis F. Ruiz-Orejón, Slim Gana, Jacopo Chiggiato, Gerasimos Korres, Aldo Drago, Pierre-Marie Poulain, Inmaculada Ruiz, Eva Aguiar, Marcos García Sotillo, Katrin Schroeder, Gianmaria Sannino, Anna Teruzzi, Jesús García Lafuente, Baptiste Mourre, Ivica Vilibić, Karina von Schuckmann, Lorinc Meszaros, Emma Reyes, Marco Zavatarelli, Lluís Gómez-Pujol, Simone Sammartino, George Kallos, Jaime Hernandez-Lasheras, Vanessa Cardin, Enrique Álvarez-Fanjul, Rosa Balbin, Karim Hilmi, Massimiliano Drudi, Devrim Tezcan, Alan Deidun, Pierre Garreau, Sarantis Sofianos, Alessandro Grandi, Barak Herut, Cristina Fossi, Stefano Salon, Ghada El Serafy, J. Pistoia, Begoña Pérez Gómez, Giovanni Coppini, Salvatore Marullo, Rafael Sardá, Mustafa Yücel, Fabrizio D'Ortenzio, Laura Prieto, Salud Deudero, Agustín Sánchez Arcilla, Rita Lecci, Georgios Sylaios, Ivan Federico, Ananda Pascual, Christian Ferrarin, Nadia Pinardi, Tintore, J., Pinardi, N., Alvarez-Fanjul, E., Aguiar, E., Alvarez-Berastegui, D., Bajo, M., Balbin, R., Bozzano, R., Nardelli, B. B., Cardin, V., Casas, B., Charcos-Llorens, M., Chiggiato, J., Clementi, E., Coppini, G., Coppola, L., Cossarini, G., Deidun, A., Deudero, S., D'Ortenzio, F., Drago, A., Drudi, M., El Serafy, G., Escudier, R., Farcy, P., Federico, I., Fernandez, J. G., Ferrarin, C., Fossi, C., Frangoulis, C., Galgani, F., Gana, S., Garcia Lafuente, J., Sotillo, M. G., Garreau, P., Gertman, I., Gomez-Pujol, L., Grandi, A., Hayes, D., Hernandez-Lasheras, J., Herut, B., Heslop, E., Hilmi, K., Juza, M., Kallos, G., Korres, G., Lecci, R., Lazzari, P., Lorente, P., Liubartseva, S., Louanchi, F., Malacic, V., Mannarini, G., March, D., Marullo, S., Mauri, E., Meszaros, L., Mourre, B., Mortier, L., Munoz-Mas, C., Novellino, A., Obaton, D., Orfila, A., Pascual, A., Pensieri, S., Perez Gomez, B., Perez Rubio, S., Perivoliotis, L., Petihakis, G., de la Villeon, L. P., Pistoia, J., Poulain, P. -M., Pouliquen, S., Prieto, L., Raimbault, P., Reglero, P., Reyes, E., Rotllan, P., Ruiz, S., Ruiz, J., Ruiz, I., Ruiz-Orejon, L. F., Salihoglu, B., Salon, S., Sammartino, S., Sanchez Arcilla, A., Sanchez-Roman, A., Sannino, G., Santoleri, R., Sarda, R., Schroeder, K., Simoncelli, S., Sofianos, S., Sylaios, G., Tanhua, T., Teruzzi, A., Testor, P., Tezcan, D., Torner, M., Trotta, F., Umgiesser, G., von Schuckmann, K., Verri, G., Vilibic, I., Yucel, M., Zavatarelli, M., Zodiatis, G., Institut Mediterrani d'Estudis Avancats (IMEDEA), Consejo Superior de Investigaciones Científicas [Madrid] (CSIC)-Universidad de las Islas Baleares (UIB), University of Bologna/Università di Bologna, SOCIB Balearic Islands Coastal Ocean Observing and Forecasting System, Istituto di Scienze Marine [Bologna] (ISMAR), Istituto di Science Marine (ISMAR ), National Research Council of Italy | Consiglio Nazionale delle Ricerche (CNR)-National Research Council of Italy | Consiglio Nazionale delle Ricerche (CNR), National Research Council of Italy | Consiglio Nazionale delle Ricerche (CNR), Laboratoire d'océanographie de Villefranche (LOV), Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut de la Mer de Villefranche (IMEV), Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER), Cyprus Oceanography Center, University of Cyprus [Nicosia] (UCY), Variabilité de l'Océan et de la Glace de mer (VOG), Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN), Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)), École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Institut méditerranéen d'océanologie (MIO), Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS), Centre Oceanogràfic de les Balears [Palma, Spain] (COB), Instituto Espagňol de Oceanografia (IEO), Consejo Superior de Investigaciones Científicas [Madrid] (CSIC)-Consejo Superior de Investigaciones Científicas [Madrid] (CSIC), Helmholtz Centre for Ocean Research [Kiel] (GEOMAR), University of Bologna, Consiglio Nazionale delle Ricerche (CNR)-Consiglio Nazionale delle Ricerche (CNR), Consiglio Nazionale delle Ricerche (CNR), Institut Français de Recherche pour l'Exploitation de la Mer - Brest (IFREMER Centre de Bretagne), University of Cyprus (UCY), Institut Pierre-Simon-Laplace (IPSL (FR_636)), École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP)-Institut de Recherche pour le Développement (IRD)-Muséum national d'Histoire naturelle (MNHN)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Institut Pierre-Simon-Laplace (IPSL (FR_636)), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP)-Institut de Recherche pour le Développement (IRD)-Muséum national d'Histoire naturelle (MNHN)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU), Universitat Politècnica de Catalunya. Departament d'Enginyeria Civil i Ambiental, Universitat Politècnica de Catalunya. LIM/UPC - Laboratori d'Enginyeria Marítima, Tintore J., Pinardi N., Alvarez-Fanjul E., Aguiar E., Alvarez-Berastegui D., Bajo M., Balbin R., Bozzano R., Nardelli B.B., Cardin V., Casas B., Charcos-Llorens M., Chiggiato J., Clementi E., Coppini G., Coppola L., Cossarini G., Deidun A., Deudero S., D'Ortenzio F., Drago A., Drudi M., El Serafy G., Escudier R., Farcy P., Federico I., Fernandez J.G., Ferrarin C., Fossi C., Frangoulis C., Galgani F., Gana S., Garcia Lafuente J., Sotillo M.G., Garreau P., Gertman I., Gomez-Pujol L., Grandi A., Hayes D., Hernandez-Lasheras J., Herut B., Heslop E., Hilmi K., Juza M., Kallos G., Korres G., Lecci R., Lazzari P., Lorente P., Liubartseva S., Louanchi F., Malacic V., Mannarini G., March D., Marullo S., Mauri E., Meszaros L., Mourre B., Mortier L., Munoz-Mas C., Novellino A., Obaton D., Orfila A., Pascual A., Pensieri S., Perez Gomez B., Perez Rubio S., Perivoliotis L., Petihakis G., de la Villeon L.P., Pistoia J., Poulain P.-M., Pouliquen S., Prieto L., Raimbault P., Reglero P., Reyes E., Rotllan P., Ruiz S., Ruiz J., Ruiz I., Ruiz-Orejon L.F., Salihoglu B., Salon S., Sammartino S., Sanchez Arcilla A., Sanchez-Roman A., Sannino G., Santoleri R., Sarda R., Schroeder K., Simoncelli S., Sofianos S., Sylaios G., Tanhua T., Teruzzi A., Testor P., Tezcan D., Torner M., Trotta F., Umgiesser G., von Schuckmann K., Verri G., Vilibic I., Yucel M., Zavatarelli M., and Zodiatis G.

Subjects
0106 biological sciences, Science with and for society, Service (systems architecture), lcsh:QH1-199.5, Nature observation, 010504 meteorology & atmospheric sciences, Climate, SDG's, Oceanography, 01 natural sciences, Operations research -- Case studies, sustained observations, 11. Sustainability, observing and forecasting system, Observing and forecasting systems, lcsh:Science, Water Science and Technology, Global and Planetary Change, Enginyeria agroalimentària::Ciències de la terra i de la vida::Climatologia i meteorologia [Àrees temàtiques de la UPC], SDG', observing and forecasting systems, ocean variability, FAIR data, climate, operational services, science with and for society, Prediction theory, Climatology -- Data processing, Environmental resource management, Seawater -- Mediterranean Region, operational service, Operational services, Variety (cybernetics), Mediterranean Sea--Climate, Ocean variability, Quantitative research -- Evaluation, Mediterrània, Mar -- Aspectes ambientals, Ocean observations, SDG’s, Best practice, Climate change, Ocean Engineering, lcsh:General. Including nature conservation, geographical distribution, Aquatic Science, Sustained observations, 12. Responsible consumption, 14. Life underwater, [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography, 0105 earth and related environmental sciences, Downstream (petroleum industry), Sustainable development, Ensemble forecasting, business.industry, 010604 marine biology & hydrobiology, Enginyeria civil::Enginyeria hidràulica, marítima i sanitària::Ports i costes [Àrees temàtiques de la UPC], 13. Climate action, lcsh:Q, observing and forecasting systems, sustained observations, ocean variability, FAIR data, climate, operational services, science with and for society, SDG’s, Business
Abstract

Este artículo contiene 30 páginas, 14 figuras., The Mediterranean community represented in this paper is the result of more than 30 years of EU and nationally funded coordination, which has led to key contributions in science concepts and operational initiatives. Together with the establishment of operational services, the community has coordinated with universities, research centers, research infrastructures and private companies to implement advanced multi-platform and integrated observing and forecasting systems that facilitate the advancement of operational services, scientific achievements and mission-oriented innovation. Thus, the community can respond to societal challenges and stakeholders needs, developing a variety of fit-for-purpose services such as the Copernicus Marine Service. The combination of state-of-the-art observations and forecasting provides new opportunities for downstreamservices in response to the needs of the heavily populatedMediterranean coastal areas and to climate change. The challenge over the next decade is to sustain ocean observations within the research community, to monitor the variability at small scales, e.g., the mesoscale/submesoscale, to resolve the sub-basin/seasonal and inter-annual variability in the circulation, and thus establish the decadal variability, understand and correct the model-associated biases and to enhance model-data integration and ensemble forecasting for uncertainty estimation. Better knowledge and understanding of the level ofMediterranean variability will enable a subsequent evaluation of the impacts and mitigation of the effect of human activities and climate change on the biodiversity and the ecosystem, which will support environmental assessments and decisions. Further challenges include extending the science-based added-value products into societal relevant downstream services and engaging with communities to build initiatives that will contribute to the 2030 Agenda and more specifically to SDG14 and the UN’s Decade of Ocean Science for sustainable development, by this contributing to bridge the science-policy gap. The Mediterranean observing and forecasting capacity was built on the basis of community best practices in monitoring and modeling, and can serve as a basis for the development of an integrated global ocean observing system.

Published
2019

20. Unveiling the Relationship Between Sea Surface Hydrographic Patterns and Tuna Larval Distribution in the Central Mediterranean Sea

Author

Patricia Reglero, Angela Cuttitta, Marco Torri, Gianluca Sarà, Diego Álvarez-Berastegui, Stefania Russo, Bernardo Patti, Russo S., Torri M., Patti B., Reglero P., Alvarez-Berastegui D., Cuttitta A., and Sarà Gianluca

Subjects
Mediterranean climate, ichthyoplankton, Science, spawning, Ocean Engineering, Aquatic Science, QH1-199.5, Oceanography, Mediterranean sea, Auxis rochei, Abundance (ecology), Auxis rochei, ichthyoplankton, Mediterranean Sea, multivariate statistical analysis, spawning, Thunnus alalunga, Thunnus thynnus, Thunnus alalunga, Water Science and Technology, multivariate statistical analysis, Global and Planetary Change, biology, Albacore, food and beverages, General. Including nature conservation, geographical distribution, Ichthyoplankton, biology.organism_classification, Thunnus thynnus, Bullet tuna, Tuna, human activities, Thunnus
Abstract

Thunnus thynnus (Atlantic bluefin tuna, ABT) and other tuna species reproduce in the Mediterranean Sea during the summer period. Despite the Central Mediterranean Sea, the Strait of Sicily in particular, being a key spawning site for many tuna species, little is known on the effects of oceanographic variability on their larval distribution in this area. The abundance and presence-absence of larval specimens for three tuna species (ABT, bullet tuna and albacore) were modeled in order to examine their relationships with environmental factors, by analysing historical in situ information collected during seven annual surveys (2010–2016). The results revealed that most tuna larvae for the three species were found in the easternmost part of the study area, south of Capo Passero. This area is characterized by a stable saline front and warmer nutrient-poor water, and it has different environmental conditions, compared with the surrounding areas. The models used to investigate the presence-absence and abundance of the three species showed that ABT was the most abundant, followed by bullet tuna and albacore. The presence and abundance data collected are comparable with those of other spawning areas in the Mediterranean. Regarding biological and physical parameters, the results suggest that temperature, salinity, and day of the year are the key factors for understanding the ecological mechanisms and geographical distribution of these species in this area. Temperature affects the presence of ABT larvae and salinity, which, with a physical barrier effect, is a key factor for the presence-absence of bullet and albacore and for albacore abundance.

Published
2021

21. Contrasting Responses to Harvesting and Environmental Drivers of Fast and Slow Life History Species.

Author

Quetglas A, Rueda L, Alvarez-Berastegui D, Guijarro B, and Massutí E

Subjects
Animals, Cephalopoda physiology, Conservation of Natural Resources, Elasmobranchii physiology, Female, Fertility, Life Cycle Stages, Male, Mediterranean Islands, Mediterranean Sea, Models, Biological, Population Dynamics, Seasons, Species Specificity, Cephalopoda growth & development, Ecosystem, Elasmobranchii growth & development
Abstract

According to their main life history traits, organisms can be arranged in a continuum from fast (species with small body size, short lifespan and high fecundity) to slow (species with opposite characteristics). Life history determines the responses of organisms to natural and anthropogenic factors, as slow species are expected to be more sensitive than fast species to perturbations. Owing to their contrasting traits, cephalopods and elasmobranchs are typical examples of fast and slow strategies, respectively. We investigated the responses of these two contrasting strategies to fishing exploitation and environmental conditions (temperature, productivity and depth) using generalized additive models. Our results confirmed the foreseen contrasting responses of cephalopods and elasmobranchs to natural (environment) and anthropogenic (harvesting) influences. Even though a priori foreseen, we did expect neither the clear-cut differential responses between groups nor the homogeneous sensitivity to the same factors within the two taxonomic groups. Apart from depth, which affected both groups equally, cephalopods and elasmobranchs were exclusively affected by environmental conditions and fishing exploitation, respectively. Owing to its short, annual cycle, cephalopods do not have overlapping generations and consequently lack the buffering effects conferred by different age classes observed in multi-aged species such as elasmobranchs. We suggest that cephalopods are sensitive to short-term perturbations, such as seasonal environmental changes, because they lack this buffering effect but they are in turn not influenced by continuous, long-term moderate disturbances such as fishing because of its high population growth and turnover. The contrary would apply to elasmobranchs, whose multi-aged population structure would buffer the seasonal environmental effects, but they would display strong responses to uninterrupted harvesting due to its low population resilience. Besides providing empirical evidence to the theoretically predicted contrasting responses of cephalopods and elasmobranchs to disturbances, our results are useful for the sustainable exploitation of these resources.

Published
2016
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22. Spatial scale, means and gradients of hydrographic variables define pelagic seascapes of bluefin and bullet tuna spawning distribution.

Author

Alvarez-Berastegui D, Ciannelli L, Aparicio-Gonzalez A, Reglero P, Hidalgo M, López-Jurado JL, Tintoré J, and Alemany F

Subjects
Animals, Biodiversity, Islands, Mediterranean Sea, Models, Theoretical, Population Dynamics, Salinity, Seawater, Spatial Analysis, Ecosystem, Tuna
Abstract

Seascape ecology is an emerging discipline focused on understanding how features of the marine habitat influence the spatial distribution of marine species. However, there is still a gap in the development of concepts and techniques for its application in the marine pelagic realm, where there are no clear boundaries delimitating habitats. Here we demonstrate that pelagic seascape metrics defined as a combination of hydrographic variables and their spatial gradients calculated at an appropriate spatial scale, improve our ability to model pelagic fish distribution. We apply the analysis to study the spawning locations of two tuna species: Atlantic bluefin and bullet tuna. These two species represent a gradient in life history strategies. Bluefin tuna has a large body size and is a long-distant migrant, while bullet tuna has a small body size and lives year-round in coastal waters within the Mediterranean Sea. The results show that the models performance incorporating the proposed seascape metrics increases significantly when compared with models that do not consider these metrics. This improvement is more important for Atlantic bluefin, whose spawning ecology is dependent on the local oceanographic scenario, than it is for bullet tuna, which is less influenced by the hydrographic conditions. Our study advances our understanding of how species perceive their habitat and confirms that the spatial scale at which the seascape metrics provide information is related to the spawning ecology and life history strategy of each species.

Published
2014
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