50 results on '"Amado-Filho, Gilberto Menezes"'
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2. Mesophotic reef fish assemblages of the remote St. Peter and St. Paul’s Archipelago, Mid-Atlantic Ridge, Brazil
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Rosa, Marcos Rogerio, Alves, Aline Cristina, Medeiros, Diego Valverde, Coni, Ericka Oliveira Cavalcanti, Ferreira, Camilo Moitinho, Ferreira, Beatrice Padovani, de Souza Rosa, Ricardo, Amado-Filho, Gilberto Menezes, Pereira-Filho, Guilherme Henrique, de Moura, Rodrigo Leão, Thompson, Fabiano Lopes, Sumida, Paulo Yukio Gomes, and Francini-Filho, Ronaldo Bastos
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- 2016
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3. Geomorphometric Seabed Classification and Potential Megahabitat Distribution in the Amazon Continental Margin
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Lavagnino, Ana Carolina, primary, Bastos, Alex Cardoso, additional, Amado Filho, Gilberto Menezes, additional, de Moraes, Fernando Coreixas, additional, Araujo, Lais Silva, additional, and de Moura, Rodrigo Leão, additional
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- 2020
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4. Drivers of biodiversity associated with rhodolith beds from euphotic and mesophotic zones: Insights for management and conservation
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Veras, Priscila de Cerqueira, primary, Pierozzi-Jr., Ivan, additional, Lino, Jaqueline Barreto, additional, Amado-Filho, Gilberto Menezes, additional, Senna, André Resende de, additional, Santos, Cinthya Simone Gomes, additional, Moura, Rodrigo Leão de, additional, Passos, Flávio Dias, additional, Giglio, Vinicius José, additional, and Pereira-Filho, Guilherme Henrique, additional
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- 2020
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5. Benthic reef assemblages of the Fernando de Noronha Archipelago, tropical South-west Atlantic: Effects of depth, wave exposure and cross-shelf positioning
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Matheus, Zaira, primary, Francini-Filho, Ronaldo Bastos, additional, Pereira-Filho, Guilherme Henrique, additional, Moraes, Fernando C., additional, Moura, Rodrigo L. de, additional, Brasileiro, Poliana S., additional, and Amado-Filho, Gilberto Menezes, additional
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- 2019
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6. Metagenomics of Coral Reefs Under Phase Shift and High Hydrodynamics
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Meirelles, Pedro Milet, primary, Soares, Ana Carolina, additional, Oliveira, Louisi, additional, Leomil, Luciana, additional, Appolinario, Luciana Reis, additional, Francini-Filho, Ronaldo Bastos, additional, de Moura, Rodrigo Leão, additional, de Barros Almeida, Renato Tenan, additional, Salomon, Paulo S., additional, Amado-Filho, Gilberto Menezes, additional, Kruger, Ricardo, additional, Siegle, Eduardo, additional, Tschoeke, Diogo A., additional, Kudo, Isao, additional, Mino, Sayaka, additional, Sawabe, Tomoo, additional, Thompson, Cristiane C., additional, and Thompson, Fabiano L., additional
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- 2018
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7. A novel antifouling defence strategy from red seaweed: fatty acid derivatives exocytosis and deposition at the cell wall surface
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Paradas, Wladimir Costa, Salgado, Leonardo Tavares, Pereira, Renato Crespo, Hellio, Claire, Atella, Georgia Correa, Moreira, Davyson de Lima, Carmo, Ana Paula Barbosa do, Soares, Angélica Ribeiro, Amado-Filho, Gilberto Menezes, Universidade Federal Fluminense [Rio de Janeiro] (UFF), Laboratoire des Sciences de l'Environnement Marin (LEMAR) (LEMAR), Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Institut Universitaire Européen de la Mer (IUEM), Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), and Universidade Federal do Rio de Janeiro (UFRJ)
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antifouling ,ACL ,fatty acids derivatives ,hydrocarbons ,Laurencia translucida ,[SDE.BE]Environmental Sciences/Biodiversity and Ecology ,vacuoles ,storage compounds - Abstract
00000; International audience; We investigated the organelles involved in the biosynthesis of fatty acids (FA) derivatives in the cortical cells of Laurencia translucida (Rhodophyta) and the effect of these compounds as antifouling (AF) agents. A bluish autofluorescence (having emissions at 500 nm) within L. translucida cortical cells were observed above the thallus surface via laser scanning confocal microscopy (LSCM). A hexanic extract (HE) from L. translucida was split into two isolated fractions called hydrocarbons (HC) and Lipids (LI), which were injected in high performance liquid chromatograph (HPLC) coupled to a fluorescence detector and revealed the same autofluorescence pattern observed by LSCM analyses (emissions at 500 nm) in the LI fraction. These fractions were analyzed by gas chromatography mass spectrometry (GC-MS), which revealed that docosane is the primary constituent of HC, and hexadecanoic acid and cholesterol trimethylsilyl ether are the primary components of LI. Nile red (NR) labelling (lipid fluorochrome) presented a similar cellular localization to that of the auto-fluorescent molecules. Transmission and scanning electron microscopy (TEM and SEM) revealed vesicle transport processes involving small electron-lucent vesicles, from vacuoles to the inner cell wall. Both fractions (HC and LI) inhibited micro-fouling (HC: lower minimum inhibitory concentration - MIC values of 0.1 μg.mL-1; LI: lower MIC value of 10 μg.mL-1). The results suggested that L. translucida cortical cells can produce FA derivatives (e.g., HCs and FAs) and secrete them to the thallus surface, providing a unique and novel protective mechanism against microfouling colonization in red algae.
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- 2016
8. Mevalonosomes: specific vacuoles containing the mevalonate pathway in Plocamium brasiliense cortical cells (Rhodophyta)
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Paradas, Wladimir Costa, Thalita Mendes Crespo, Salgado, Leonardo Tavares, Andrade, Leonardo Rodrigues De, Soares, Angelica Ribeiro, Hellio, Claire, Paranhos, Ricardo Rogers, Hill, Lilian Jorge, Geysa Marinho De Souza, Kelecom, Alphonse Germaine Albert Charles, Gama, Bernardo Antonio Perez Da, Pereira, Renato Crespo, and Amado-Filho, Gilberto Menezes
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- 2016
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9. Cell wall physicochemical properties determine the thallus biomineralization pattern ofPadina gymnospora(Phaeophyceae)
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de Carvalho, Rodrigo Tomazetto, primary, Rocha, Gustavo Miranda, additional, Paradas, Wladimir Costa, additional, Soares, Angélica Ribeiro, additional, Ank Guarino, Gláucia, additional, Passos, Raoni Moreira Ferreira, additional, Amado Filho, Gilberto Menezes, additional, Farina, Marcos, additional, and Salgado, Leonardo Tavares, additional
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- 2017
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10. Massive opisthobranch aggregation in the largest coralline reefs in the South Atlantic Ocean: are mesoherbivores underestimated top-down players?
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de Vargas Ribeiro, Felipe, primary, Padula, Vinicius, additional, de Moura, Rodrigo Leão, additional, de Moraes, Fernando Coreixas, additional, Salomon, Paulo Sergio, additional, Gibran, Fernando Zaniolo, additional, Motta, Fabio dos Santos, additional, Pereira, Renato Crespo, additional, Amado-Filho, Gilberto Menezes, additional, and Pereira-Filho, Guilherme Henrique, additional
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- 2017
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11. Biomineralization of calcium carbonate in the cell wall of Lithothamnion crispatum (Hapalidiales, Rhodophyta): correlation between the organic matrix and the mineral phase
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de Carvalho, Rodrigo Tomazetto, primary, Salgado, Leonardo Tavares, additional, Amado Filho, Gilberto Menezes, additional, Leal, Rachel Nunes, additional, Werckmann, Jacques, additional, Rossi, André Linhares, additional, Campos, Andrea Porto Carreiro, additional, Karez, Cláudia Santiago, additional, and Farina, Marcos, additional
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- 2017
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12. Environmental licensing on rhodolith beds: insights from a worm
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Santos, Cinthya Simone Gomes, Lino, Jaqueline Barreto, Veras, Priscila de Cerqueira, Amado-Filho, Gilberto Menezes, Francini-Filho, Ronaldo Bastos, Motta, Fabio Santos, Moura, Rodrigo Leão de, and Pereira-Filho, Guilherme Henrique
- Abstract
Rhodoliths are free-living nodules formed by crustose coralline algae that promote multi-dimensional microhabitats for a highly diverse community. Because their CaCO3production, rhodolith beds constitute areas of interest for mining activities. On the other hand, other goods and services provided by these environments such as nurseries habitats, fishing and climate regulation remain undersized. Besides directly CaCO3exploitation, these diverse ecosystems within the Brazilian economic exclusive zone are often covering potentially sites for oil and gas extraction. The IBAMA (Environmental Agency of the Brazilian government) have been applying the precautionary principle to deny requests for oil/gas drilling activities where rhodolith beds occur. Here, we discuss recent data about diversity associated with rhodoliths and also record the “rare” worm Nuchalosylliscf. maiteae. More than the distribution of one only species, our finding is an emblematic example of our infancy knowledge state about diversity associated with rhodolith beds in southwestern Atlantic. We argue that these knowledge is still insufficient to subside any attempt in classify priorities areas for oil wells drilling. In addition, we claim that the precautionary principle adopted by IBAMA must prevalence until we have robust data allowing predictions concerning higher or lower biodiversity associated with rhodolith beds.
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- 2024
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13. Environmental licensing on rhodolith beds: insights from a worm
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Santos, Cinthya Simone Gomes, primary, Lino, Jaqueline Barreto, additional, Veras, Priscila de Cerqueira, additional, Amado-Filho, Gilberto Menezes, additional, Francini-Filho, Ronaldo Bastos, additional, Motta, Fabio Santos, additional, Moura, Rodrigo Leão de, additional, and Pereira-Filho, Guilherme Henrique, additional
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- 2016
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14. Carbonate Production by Benthic Communities on Shallow Coralgal Reefs of Abrolhos Bank, Brazil
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Reis, Vanessa Moura dos, primary, Karez, Cláudia Santiago, additional, Mariath, Rodrigo, additional, de Moraes, Fernando Coreixas, additional, de Carvalho, Rodrigo Tomazetto, additional, Brasileiro, Poliana Silva, additional, Bahia, Ricardo da Gama, additional, Lotufo, Tito Monteiro da Cruz, additional, Ramalho, Laís Vieira, additional, de Moura, Rodrigo Leão, additional, Francini-Filho, Ronaldo Bastos, additional, Pereira-Filho, Guilherme Henrique, additional, Thompson, Fabiano Lopes, additional, Bastos, Alex Cardoso, additional, Salgado, Leonardo Tavares, additional, and Amado-Filho, Gilberto Menezes, additional
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- 2016
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15. Chloroplasts morphology investigation with diverse microscopy approaches and inter-specific variation in Laurencia species (Rhodophyta)
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Paradas, Wladimir Costa, primary, Andrade, Leonardo Rodrigues, additional, Salgado, Leonardo Tavares, additional, Collado-Vides, Ligia, additional, Pereira, Renato Crespo, additional, and Amado-Filho, Gilberto Menezes, additional
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- 2015
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16. Seabed Morphology and Sedimentary Regimes defining Fishing Grounds along the Eastern Brazilian Shelf.
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Bourguignon, Silvia N., Bastos, Alex C., Quaresma, Valéria S., Vieira, Fernanda V., Pinheiro, Hudson, Amado-Filho, Gilberto Menezes, de Moura, Rodrigo Leão, and Teixeira, João Batista
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BATHYMETRIC maps ,OCEANOGRAPHIC maps - Abstract
Shelf morphology and sedimentary regimes are influenced by processes operating at different temporal and spatial scales and are important records of sea level changes and sediment supply and/or carbonate production. The northern continental shelf of Espírito Santo (Brazil) contains evidence of different sedimentary regimes that distribute diverse and complex marine habitats. Herein, seabed morphology, acoustic images of the seafloor (side scan sonar and sub-bottom profiler), and sediment samples were used to investigate the influence of sedimentary regimes on physical marine habitat distribution. Seabed mapping is also integrated with available data on fisheries to understand the influence of shelf morphology and sedimentology in the usage of distinct fishing gears. The results indicate five morpho-sedimentary facies: terrigenous mud, terrigenous sand, rhodolith beds, carbonate gravel with rhodoliths, and hardground. Through an integrated analysis of the geomorphology and sedimentary distribution, two morpho-sedimentary domains were identified: a sediment-fed shelf adjacent to the Doce River associated with a major mud depocenter and a delta front morphology characterized by gentle slopes and low terrain ruggedness, and a sediment-starved shelf dominated by carbonate sedimentation showing an irregular morphology associated with higher slopes and terrain ruggedness. These contrasting morpho-sedimentary domains are a result of sedimentary responses to sea level fluctuation during Late Quaternary, specially, during the deglaciation processes after the Last Glacial Maximum. The morphological and sedimentary contrasts along the area define the physical habitat distribution. The sediment supply regime area is associated with a terrigenous fine/muddy sedimentation bed, which control the local morphology and favors coastal and delta front progradation. This physical habitat is a well-known shrimp-fishing ground where intense trawling takes place, as well as gillnet fisheries targeting weakfish and croakers. The accommodation regime or low sediment influx area is characterized by carbonate sedimentation associated with hardgrounds and rhodolith beds. In contrast, this physical habitat with scarce sediment supply, facilitates extensive benthic colonization by crustose coralline algae (CCA), which is primarily associated to line fisheries, longlines, and spearfishing. Rhodoliths show a high diversity of CCA and the occurrence of an endemic kelp species. Long-term processes such as relative sea level fluctuations and sediment supply are a legacy for the distribution of benthichabitats, and their resulting morphology can be a surrogate for predicting fishing activities or a first-base analysis for marine spatial planning. Available low-resolution bathymetric datasets can be a powerful tool, if applied with caution and in a regional scale approach. Here, terrain variables (terrain slope and ruggedness) derived from an extensive available (low-resolution and interpolated) bathymetric dataset distinguished two contrasting morphological domains characterized by rugged and smooth/flat seabeds. [ABSTRACT FROM AUTHOR]
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- 2018
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17. Cell wall physicochemical properties determine the thallus biomineralization pattern of Padina gymnospora (Phaeophyceae).
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Carvalho, Rodrigo Tomazetto, Rocha, Gustavo Miranda, Paradas, Wladimir Costa, Soares, Angélica Ribeiro, Ank Guarino, Gláucia, Passos, Raoni Moreira Ferreira, Amado Filho, Gilberto Menezes, Farina, Marcos, Salgado, Leonardo Tavares, and Wetherbee, R.
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BROWN algae ,BIOMINERALIZATION ,PLANT cell walls ,CRYSTALLIZATION ,PHENOLS ,POLYSACCHARIDES - Abstract
Approximately half of the Padina (Dictyotales, Phaeophyceae) species mineralize aragonite needles over the adaxial thallus surface, where mineral bands are interspersed with nonmineralized regions along the thallus from the apical to basal end. However, this calcification pattern and the related algal properties are not well understood. Therefore, this work was performed to elucidate a potential role of cell walls in the inhibition/induction of mineralization in the brown alga Padina gymnospora. In a comparison of specific thallus regions, differences were identified in the cellulose distribution, microfibrils arrangement and thickness, distribution and abundance of phenolic substances, and physical differences among the surfaces of the thallus (deformation, adhesion, topography, and nano-rugosity). In vitro mineralization assays indicated that phenolic substances are strong modulators of calcium carbonate crystals growth. In addition, de novo mineralization assays over cell wall surfaces that were used as templates, even without cellular activity, indicated that the cell wall remains a key factor in the induction/inhibition of mineralization. Overall, the current findings indicate a strong correlation between the physico-chemical and structural properties of the cell wall and the alternation pattern of the mineralization bands over the thallus of P. gymnospora. [ABSTRACT FROM AUTHOR]
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- 2017
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18. Environmental Science and Pollution Research
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Vianna, Nelzair Araújo, Gonçalves, Daniel, Brandão, Flávia R., Barros, Roberta P. de, Amado Filho, Gilberto Menezes, Meire, Rodrigo Ornellas, Torres, João Paulo Machado, Malm, Olaf, D'Oliveira Junior, Argemiro, and Andrade, Leonardo R.
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Atmospheric pollution ,Heavy metals ,Air particulate matter ,Biomonitoring ,Electron microscopy ,Tillandsia - Abstract
Texto completo: acesso restrito. p. 416–427 Submitted by Edileide Reis (leyde-landy@hotmail.com) on 2014-04-08T17:32:25Z No. of bitstreams: 1 Nelzair A. Vianna.pdf: 756750 bytes, checksum: 8e42f07a4decd5bd5da2b76e0d7a1020 (MD5) Approved for entry into archive by Flávia Ferreira (flaviaccf@yahoo.com.br) on 2015-05-04T15:09:45Z (GMT) No. of bitstreams: 1 Nelzair A. Vianna.pdf: 756750 bytes, checksum: 8e42f07a4decd5bd5da2b76e0d7a1020 (MD5) Made available in DSpace on 2015-05-04T15:09:45Z (GMT). No. of bitstreams: 1 Nelzair A. Vianna.pdf: 756750 bytes, checksum: 8e42f07a4decd5bd5da2b76e0d7a1020 (MD5) Previous issue date: 2011 Purpose The aims of this paper were to quantify the heavy metals (HM) in the air of different sites in Rio de Janeiro (RJ) and Salvador (SA) using Tillandsia usneoides (Bromeliaceae) as a biomonitor, and to study the morphology and elemental composition of the air particulate matter (PM) retained on the Tillandsia surface. Methods Tillandsia samples were collected in a noncontaminated area and exposed to the air of five sites in RJ State and seven in SA for 45 days, in two seasons. Samples were prepared to HM quantification by flame atomic absorption spectrophotometry, while morphological and elemental characterizations were studied by using scanning electron microscopy. Results HM concentrations were significantly higher when compared to control sites. We found an increasing metal concentration as follows: Cd < Cr < Pb < Cu < Zn. PM exhibited a morphology varying from amorphous- to polygonal-shaped particles. Size measurements indicated that more than 80% of particles were less than 10 μm. PM contained aluminosilicates iron-rich particles, but Zn, Cu, Cr, and Ba were also detected. Conclusion HM input in the atmosphere was mainly associated with anthropogenic sources such as vehicle exhaust. Elemental analysis detected HM in the inhalable particles, indicating that those HMs may intensify the toxic effects of PM on human health. Our results indicated T. usneoides as an adequate biomonitor of HM in the PM belonging to the inhalable fraction.
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- 2011
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19. Mesophotic reef fish assemblages of the remote St. Peter and St. Paul’s Archipelago, Mid-Atlantic Ridge, Brazil
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Rosa, Marcos Rogerio, primary, Alves, Aline Cristina, additional, Medeiros, Diego Valverde, additional, Coni, Ericka Oliveira Cavalcanti, additional, Ferreira, Camilo Moitinho, additional, Ferreira, Beatrice Padovani, additional, de Souza Rosa, Ricardo, additional, Amado-Filho, Gilberto Menezes, additional, Pereira-Filho, Guilherme Henrique, additional, de Moura, Rodrigo Leão, additional, Thompson, Fabiano Lopes, additional, Sumida, Paulo Yukio Gomes, additional, and Francini-Filho, Ronaldo Bastos, additional
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- 2015
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20. Changes in benthic communities along a 0–60 m depth gradient in the remote St. Peter and St. Paul Archipelago (Mid-Atlantic Ridge, Brazil)
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Magalhães, Gabriela Machado, primary, Amado-Filho, Gilberto Menezes, additional, Rosa, Marcos Rogerio, additional, de Moura, Rodrigo Leão, additional, Brasileiro, Poliana Silva, additional, De Moraes, Fernando Coreixas, additional, Francini-Filho, Ronaldo Bastos, additional, and Pereira-Filho, Guilherme Henrique, additional
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- 2015
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21. Mevalonosomes: specific vacuoles containing the mevalonate pathway in Plocamium brasiliense cortical cells (Rhodophyta)
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Paradas, Wladimir Costa, primary, Crespo, Thalita Mendes, additional, Salgado, Leonardo Tavares, additional, de Andrade, Leonardo Rodrigues, additional, Soares, Angélica Ribeiro, additional, Hellio, Claire, additional, Paranhos, Ricardo Rogers, additional, Hill, Lilian Jorge, additional, de Souza, Geysa Marinho, additional, Kelecom, Alphonse Germaine Albert Charles, additional, Da Gama, Bernardo Antônio Perez, additional, Pereira, Renato Crespo, additional, and Amado‐Filho, Gilberto Menezes, additional
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- 2015
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22. BaMBa: towards the integrated management of Brazilian marine environmental data
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Meirelles, Pedro Milet, primary, Gadelha, Luiz M. R., additional, Francini-Filho, Ronaldo Bastos, additional, de Moura, Rodrigo Leão, additional, Amado-Filho, Gilberto Menezes, additional, Bastos, Alex Cardoso, additional, Paranhos, Rodolfo Pinheiro da Rocha, additional, Rezende, Carlos Eduardo, additional, Swings, Jean, additional, Siegle, Eduardo, additional, Asp Neto, Nils Edvin, additional, Leitão, Sigrid Neumann, additional, Coutinho, Ricardo, additional, Mattoso, Marta, additional, Salomon, Paulo S., additional, Valle, Rogério A.B., additional, Pereira, Renato Crespo, additional, Kruger, Ricardo Henrique, additional, Thompson, Cristiane, additional, and Thompson, Fabiano L., additional
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- 2015
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23. Floristic composition of crustose coralline algae from the St. Peter and St. Paul Archipelago, a summit of the Mid-Atlantic Ridge
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Crespo, Thalita Mendes, primary, Bahia, Ricardo Da Gama, additional, Maneveldt, Gavin Willian, additional, and Amado Filho, Gilberto Menezes, additional
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- 2014
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24. Porolithon improcerum (Porolithoideae, Corallinaceae) and Mesophyllum macroblastum (Melobesioideae, Hapalidiaceae): new records of crustose coralline red algae for the Southwest Atlantic Ocean
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Bahia, Ricardo Da Gama, primary, Amado Filho, Gilberto Menezes, additional, Azevedo, Jonas, additional, and Maneveldt, Gavin Willian, additional
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- 2014
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25. First record of Reticulocaulis mucosissimus I. A. Abbott (Naccariaceae, Rhodophyta) for the western Atlantic Ocean
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Guimarães, Silvia Maria P. B. and Amado-Filho, Gilberto Menezes
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Espírito Santo State ,Brasil ,Naccariaceae ,diversidade ,Estado do Espírito Santo ,Brazil ,diversity ,Reticulocaulis mucosissimus - Abstract
Espírito Santo State lies in the transition region (18°-21° S) between the tropical and subtropical marine-algal provinces and is considered the richest area of the Brazilian flora. The subtidal substratum presents extensive areas of rhodoliths associated with a diversified marine biota. A detailed exploration using Scuba diving technique has revealed many little-known and previously unreported taxa that are new to the Brazilian coast. Among the algae recently discovered, Reticulocaulis mucosissimus I. A. Abbott was found at a depth of 25 meters, thus consisting of the second member of the infrequently encountered family Naccariaceae growing in the same region. This work has revealed additional distribution records of this species not yet reported from the western Atlantic. Description of the morphological and reproductive features of the species as well as illustrations and comments are presented. O Estado do Espírito Santo situa-se em uma região de transição (18°-21° S) entre as províncias marinhas tropical e subtropical e, é considerada a área mais rica do Brasil quanto a flora marinha. A região subtidal apresenta extensas áreas de rodolitos associados com uma biota marinha diversificada. Um estudo detalhado através do emprego do mergulho autônomo Scuba está revelando muitos táxons pouco conhecidos e ainda não referidos para a costa brasileira. Entre as algas recentemente descobertas, Reticulocaulis mucosissimus I. A. Abbott foi encontrada em uma profundidade de 25 metros, constituindo-se no segundo representante da família Naccariaceae crescendo na mesma região. De um modo geral, os representantes desta família são dificilmente encontrados. Este trabalho amplia consideravelmente a distribuição desta espécie que não havia ainda sido referida para o Oceano Atlântico ocidental. A descrição das características morfológicas e reprodutivas da espécie é apresentada, assim como, ilustrações e comentários.
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- 2009
26. Algas marinhas bentônicas daregião de Cabo Frio e arredores: síntese do conhecimento
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Brasileiro, Poliana S., Yoneshigue-Valentin, Yocie, Bahia, Ricardo da G., Reis, Renata P., and Amado Filho, Gilberto Menezes
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algas marinhas bentônicas ,upwelling ,benthic marine algae ,floristic ,Cabo Frio region ,ressurgência ,Rio de Janeiro State ,estado do Rio de Janeiro ,florística,região de Cabo Frio - Abstract
RESUMO Nas últimas décadas, foram realizados diversos estudos sobre as algas marinhas bentônicas da região de Cabo Frio (RCF), entretanto essa informação está dispersa em publicações avulsas, dissertações e teses. Neste contexto, o objetivo deste trabalho é realizar a revisão da literatura sobre as algas marinhas bentônicas da RCF e fornecer uma listagem detalhada dos táxons com uma análise da composição florística e distribuição geográfica desta importante região do litoral brasileiro. Foram listados 339 táxons infragenéricos, distribuídos em 76 Chlorophyta, 60 Ochrophyta e 203 Rhodophyta. Os municípios com maior número de táxons foram os de Armação dos Búzios (212) e Arraial do Cabo (207). Ao comparar os 339 táxons encontrados com os registrados para o litoral brasileiro, 20 apresentam distribuição geográfica restrita a RCF e 8 possuem afinidade com águas frias. As espéciesPseudolithoderma moreirae Yoneshigue & Boudouresque e Gracilaria yoneshigueana Gurgel, Fredericq & J. Norris são endêmicas da RCF. A partir dos dados reunidos que indicam a elevada riqueza e a presença de elevado número de espécies com distribuição discontínua e restrita, podese afirmar que a RCF é uma das mais importantes áreas da diversidade de algas do Brasil. ABSTRACT At the last decades, several studies were done about benthic marine algae from Cabo Frio region (RCF), meanwhile the obtained information is scattered in specific publication, monographs and thesis. In this context, the aim of this work is to revise the literature about marine algae from RCF, providing a detailed list of taxa, and analyzing the floristic composition and geographical distribution of benthic marine algae of this importance region from the Brazilian coast. It was found 339 infrageneric taxa, distributed in 76 Chlorophyta, 60 Ochrophyta and 203 Rhodophyta. The municipalities with higher number of taxa were Armação dos Búzios (212) and Arraial do Cabo (207). It was found that 20 of the 339 taxa listed presented distribution restricted to RCF when comparing with the taxa registered to the Brazilian coast and that 8 taxa presented affinities with temperate waters. The species Pseudolithoderma moreirae Yoneshigue & Boudouresque and Gracilaria yoneshigueana Gurgel, Fredericq & J. Norris are endemic to RCF. From the obtained data that indicates an elevate species richness and the presence of number species with restricted and discontinued distribution we can affirm that RCF is one of the most important diversity center of marine algae in Brazil.
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- 2009
27. Editorial
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Araújo, Dorothy Sue Dunn de and Amado Filho, Gilberto Menezes
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- 2009
28. BIOMINERALIZATION OF CALCIUM CARBONATE IN THE CELL WALL OF LITHOTHAMNION CRISPATUM (HAPALIDIALES, RHODOPHYTA): CORRELATION BETWEEN THE ORGANIC MATRIX AND THE MINERAL PHASE.
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Carvalho, Rodrigo Tomazetto, Salgado, Leonardo Tavares, Amado Filho, Gilberto Menezes, Leal, Rachel Nunes, Werckmann, Jacques, Rossi, André Linhares, Campos, Andrea Porto Carreiro, Karez, Cláudia Santiago, Farina, Marcos, and Amsler, C.
- Subjects
BIOMINERALIZATION ,FRESHWATER algae ,CALCIUM carbonate ,CORALLINE algae ,MICROTOMES - Abstract
Over the past few decades, progress has been made toward understanding the mechanisms of coralline algae mineralization. However, the relationship between the mineral phase and the organic matrix in coralline algae has not yet been thoroughly examined. The aim of this study was to describe the cell wall ultrastructure of Lithothamnion crispatum, a cosmopolitan rhodolith-forming coralline algal species collected near Salvador (Brazil), and examine the relationship between the organic matrix and the nucleation and growth/shape modulation of calcium carbonate crystals. A nanostructured pattern was observed in L. crispatum along the cell walls. At the nanoscale, the crystals from L. crispatum consisted of several single crystallites assembled and associated with organic material. The crystallites in the bulk of the cell wall had a high level of spatial organization. However, the crystals displayed cleavages in the (104) faces after ultrathin sectioning with a microtome. This organism is an important model for biomineralization studies as the crystallographic data do not fit in any of the general biomineralization processes described for other organisms. Biomineralization in L. crispatum is dependent on both the soluble and the insoluble organic matrix, which are involved in the control of mineral formation and organizational patterns through an organic matrix-mediated process. This knowledge concerning the mineral composition and organizational patterns of crystals within the cell walls should be taken into account in future studies of changing ocean conditions as they represent important factors influencing the physico-chemical interactions between rhodoliths and the environment in coralline reefs. [ABSTRACT FROM AUTHOR]
- Published
- 2017
- Full Text
- View/download PDF
29. O conhecimento da fauna marinha bentônica brasileira através dos tempos
- Author
-
Longo, Leila de Lourdes, primary and Amado Filho, Gilberto Menezes, additional
- Published
- 2014
- Full Text
- View/download PDF
30. Sponges and fish facilitate succession from rhodolith beds to reefs
- Author
-
Pereira-Filho, Guilherme Henrique, primary, Francini-Filho, Ronaldo Bastos, additional, Pierozzi-Jr, Ivan, additional, Pinheiro, Hudson Tércio, additional, Bastos, Alex Cardoso, additional, de Moura, Rodrigo Leão, additional, Moraes, Fernando Coreixas, additional, Matheus, Zaira, additional, da Gama Bahia, Ricardo, additional, and Amado-Filho, Gilberto Menezes, additional
- Published
- 2014
- Full Text
- View/download PDF
31. Spatial patterns of benthic megahabitats and conservation planning in the Abrolhos Bank
- Author
-
Moura, Rodrigo Leão, primary, Secchin, Nélio Augusto, additional, Amado-Filho, Gilberto Menezes, additional, Francini-Filho, Ronaldo Bastos, additional, Freitas, Matheus Oliveira, additional, Minte-Vera, Carolina Viviana, additional, Teixeira, João Batista, additional, Thompson, Fabiano Lopes, additional, Dutra, Guilherme Fraga, additional, Sumida, Paulo Yukio Gomes, additional, Guth, Arthur Zigliatti, additional, Lopes, Rubens Mendes, additional, and Bastos, Alex Cardoso, additional
- Published
- 2013
- Full Text
- View/download PDF
32. A Novel Antifouling Defense Strategy from Red Seaweed: Exocytosis and Deposition of Fatty Acid Derivatives at the Cell Wall Surface.
- Author
-
Paradas, Wladimir Costa, Salgado, Leonardo Tavares, Pereira, Renato Crespo, Hellio, Claire, Atella, Georgia Correa, de Lima Moreira, Davyson, do Carmo, Ana Paula Barbosa, Soares, Anglicaé Ribeiro, and Amado-Filho, Gilberto Menezes
- Subjects
RED algae ,ALGAL cell walls ,BIOCIDES ,EXOCYTOSIS ,FATTY acid derivatives ,BIOFLUORESCENCE - Abstract
We investigated the organelles involved in the biosynthesis of fatty acid (FA) derivatives in the cortical cells of Laurencia translucida (Rhodophyta) and the effect of these compounds as antifouling (AF) agents. A bluish autofluorescence (with emission at 500 nm) within L. translucida cortical cells was observed above the thallus surface via laser scanning confocal microscopy (LSCM). A hexanic extract (HE) from L. translucida was split into two isolated fractions called hydrocarbon (HC) and lipid (LI), which were subjected to HPLC coupled to a fluorescence detector, and the same autofluorescence pattern as observed by LSCM analyses (emission at 500 nm) was revealed in the LI fraction. These fractions were analyzed by gas chromatography-mass spectrometry (GC-MS), which revealed that docosane is the primary constituent of HC, and hexadecanoic acid and cholesterol trimethylsilyl ether are the primary components of LI. Nile red (NR) labeling (lipid fluorochrome) presented a similar cellular localization to that of the autofluorescent molecules. Transmission and scanning electron microscopy (TEM and SEM) revealed vesicle transport processes involving small electron-lucent vesicles, from vacuoles to the inner cell wall. Both fractions (HC and LI) inhibited microfouling [HC, lower minimum inhibitory concentration (MIC) values of 0.1 mg ml-1; LI, lower MIC value of 10 mg ml-
1 ]. The results suggested that L. translucida cortical cells can produce FA derivatives (e.g. HCs and FAs) and secrete them to the thallus surface, providing a unique and novel protective mechanism against microfouling colonization in red algae. [ABSTRACT FROM AUTHOR]- Published
- 2016
- Full Text
- View/download PDF
33. Group Nest Clearing Behavior by the Sergeant Major Abudefduf saxatilis (Pisces: Pomacentridae)
- Author
-
Francini-Filho, Ronaldo Bastos, primary, Coni, Ericka Oliveira Cavalcanti, additional, Ferreira, Camilo Moitinho, additional, Alves, Aline Cristina, additional, Rodrigues, Laís Silva, additional, and Amado-Filho, Gilberto Menezes, additional
- Published
- 2012
- Full Text
- View/download PDF
34. Reef fish and benthic assemblages of the Trindade and Martin Vaz Island group, southwestern Atlantic
- Author
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Pereira-Filho, Guilherme Henrique, primary, Amado-Filho, Gilberto Menezes, additional, Guimarães, Silvia M. P. B., additional, Moura, Rodrigo L., additional, Sumida, Paulo Y. G., additional, Abrantes, Douglas P., additional, Bahia, Ricardo G., additional, Güth, Arthur Z., additional, Jorge, Renato R., additional, and Francini Filho, Ronaldo Bastos, additional
- Published
- 2011
- Full Text
- View/download PDF
35. First record of Reticulocaulis mucosissimus I. A. Abbott (Naccariaceae, Rhodophyta) for the western Atlantic Ocean
- Author
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Guimarães, Silvia Maria P. B., primary and Amado-Filho, Gilberto Menezes, additional
- Published
- 2009
- Full Text
- View/download PDF
36. Editorial
- Author
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Araújo, Dorothy Sue Dunn de, primary and Amado Filho, Gilberto Menezes, additional
- Published
- 2009
- Full Text
- View/download PDF
37. Algas marinhas bentônicas daregião de Cabo Frio e arredores: síntese do conhecimento
- Author
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Brasileiro, Poliana S., primary, Yoneshigue-Valentin, Yocie, additional, Bahia, Ricardo da G., additional, Reis, Renata P., additional, and Amado Filho, Gilberto Menezes, additional
- Published
- 2009
- Full Text
- View/download PDF
38. Deep-water gelatinous rhodophytes from southern Espírito Santo State, Brazil
- Author
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Guimarães, Silvia Maria P.B., primary and Amado-Filho, Gilberto Menezes, additional
- Published
- 2008
- Full Text
- View/download PDF
39. MORFOANATOMIA DE ESPÉCIES BRASILEIRAS DE OXYPETALUM (ASCLEPIADOIDEAE-APOCYNACEAE)
- Author
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Silva, Nilda Marquete F., primary, Valente, Maria da Conceição, additional, Pereira, Jorge Fontella, additional, Amado Filho, Gilberto Menezes, additional, and Andrade, Leonardo R., additional
- Published
- 2008
- Full Text
- View/download PDF
40. Subtidal benthic marine algae of the Todos os Santos Bay, Bahia State, Brazil
- Author
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Marins, Bianca Veras, primary, Brasileiro, Poliana Silva, additional, Barreto, Maria Beatriz de Barros, additional, Nunes, José Marcos de Castro, additional, Yoneshigue-Valentin, Yocie, additional, and Amado Filho, Gilberto Menezes, additional
- Published
- 2008
- Full Text
- View/download PDF
41. The influence of brown algae alginates on phenolic compounds capability of ultraviolet radiation absorption in vitro
- Author
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Salgado, Leonardo Tavares, primary, Tomazetto, Rodrigo, additional, Cinelli, Leonardo Paes, additional, Farina, Marcos, additional, and Amado Filho, Gilberto Menezes, additional
- Published
- 2007
- Full Text
- View/download PDF
42. Changes in benthic communities alonga 0-60 m depth gradient in the remote St. Peter and St. Paul Archipelago (Mid-Atlantic Ridge, Brazil).
- Author
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Magalhães, Gabriela Machado, Amado-Filho, Gilberto Menezes, Rosa, Marcos Rogerio, de Moura, Rodrigo Leao, Brasileiro, Poliana Silva, de Moraes, Fernando Coreixas, Francini-Filho, Ronaldo Bastos, and Pereira-Filho, Guilherme Henrique
- Subjects
- *
BENTHIC ecology , *SEAMOUNTS , *CORAL reefs & islands , *BRYOZOA , *REMOTE submersibles - Abstract
Baseline studies of South Atlantic oceanic islands and seamounts are scarce compared with those from other regions. Indeed, mesophotic depths are rarely assessed and their study contributes to the global knowledge gaps about reef ecosystems. Here, we present the first detailed quantitative assessment of benthic communities across an abrupt depth gradient (euphotic to mesophotic) in the smallest and most isolated tropical rocky reefs in the world, the St. Peter and St. Paul Archipelago (SPSPA). The influence of biotic (abundance of fish trophic groups) and abiotic (benthic complexity, depth, and light) variables on benthic community structure was evaluated with scuba and a remotely operated vehicle. We recorded 77 benthic taxa in six groups (macroalgae, Porifera, Cnidaria, Annelida, Tunicata, and Bryozoa). Macroalgae was the richest group (41 infrageneric taxa), with 17 new records for the SPSPA. Turf algae was the most abundant group in both the euphotic and mesophotic samples (26 species), but only eight turfforming species occurred in the latter. Two distinct benthic assemblages were detected: (1) a euphotic assemblage (0-30 m) composed primarily of the zoanthid Palythoa caribaeorum (Duchassaing and Michelotti, 1861), the fleshy alga Caulerpa racemosa (Forsskål) J. Agardh, crustose coralline algae (CCA), and Bryopsis spp.; and (2) a mesophotic assemblage (30-60 m) dominated by CCA, bryozoans, and scleractinian corals. Depth and light were the most important predictors of benthic community structure. [ABSTRACT FROM AUTHOR]
- Published
- 2015
- Full Text
- View/download PDF
43. Levantamento florístico das macroalgas da baía de Sepetiba e adjacências, RJ: ponto de partida para o Programa GloBallast no Brasil
- Author
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Széchy, Maria Teresa Menezes de, primary, Amado Filho, Gilberto Menezes, additional, Cassano, Valéria, additional, De-Paula, Joel Campos, additional, Barreto, Maria Beatriz de Barros, additional, Reis, Renata Perpétuo, additional, Marins-Rosa, Bianca Veras, additional, and Moreira, Fátima Malheiro, additional
- Published
- 2005
- Full Text
- View/download PDF
44. Knowledge of Brazilian benthic marine fauna throughout time.
- Author
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de Lourdes Longo, Leila and Amado Filho, Gilberto Menezes
- Abstract
The ecosystems of Brazil's continental shelf and oceanic islands comprise a variety of environments that display unique geomorphological and geophysical features and biotic components. The quest to attain knowledge of Brazilian marine fauna is hampered by coastline length, biodiversity, a high rate of endemism, and a shortage of specialized researchers. Based on a systematic bibliographic review, the article offers an overview of the history, current knowledge, and outlook for the field of marine biodiversity in Brazil. Our findings show that government initiatives have afforded greater knowledge of Brazilian marine fauna species and opened new perspectives, including reliance on complex tools to describe benthic marine habitats in terms of their geological, geophysical, and biotic composition. [ABSTRACT FROM AUTHOR]
- Published
- 2014
- Full Text
- View/download PDF
45. Sponges and fish facilitate succession from rhodolith beds to reefs.
- Author
-
Pereira-Filho, Guilherme Henrique, Francini-Filho, Ronaldo Bastos, Pierozzi-Jr, Ivan, Tércio Pinheiro, Hudson, Cardoso Bastos, Alex, de Moura, Rodrigo Leão, Coreixas Moraes, Fernando, Matheus, Zaira, da Gama Bahia, Ricardo, and Amado-Filho, Gilberto Menezes
- Subjects
SPONGES (Invertebrates) ,CORAL reef fishes ,CORAL reefs & islands - Abstract
An abstract of the article "Sponges and fish facilitate succession from rhodolith beds to reefs," by Guilherme Henrique Pereira-Filho and colleagues is presented.
- Published
- 2015
- Full Text
- View/download PDF
46. Influence of sponges on agglutinating process of rhodoliths and consolidated reef formation
- Author
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Pierozzi Junior, Ivan, Pereira-Filho, Guilherme Henrique, Moraes, Fernando Coreixas de, AMADO FILHO, Gilberto Menezes, and NEVES, Leonardo Mitrano
- Subjects
rodolitos ,corals ,corais ,esponjas ,Biologia Geral ,recifes consolidados ,reef ,rhodoliths ,sponges - Abstract
Submitted by Jorge Silva (jorgelmsilva@ufrrj.br) on 2016-10-18T18:36:37Z No. of bitstreams: 1 2015 - Ivan Pierozzi Junior.pdf: 92591526 bytes, checksum: b6f151111ef71de5cd89f7d46f910fff (MD5) Made available in DSpace on 2016-10-18T18:36:37Z (GMT). No. of bitstreams: 1 2015 - Ivan Pierozzi Junior.pdf: 92591526 bytes, checksum: b6f151111ef71de5cd89f7d46f910fff (MD5) Previous issue date: 2015-11-27 CAPES Rhodolith bed has aroused growing interest of the scientific community, not being different to the Fernando de Noronha Archipelago (FNA). FNA rhodolith banks occur at depths of 10 to 100m and are peculiar habitat that increases structural complexity, providing increased associated diversity compared to unconsolidated substrates. The interaction between rhodoliths and sponges is the focus of this study. On the banks of AFN sponges play an important role in the stabilization mechanism of rhodoliths, accounting for coalescing neighbour nodules, which may point to an early stage of an on going process of stabilization in the form of a consolidated reef. The presence of reef-building corals in the adjacent rocky shore can also be related to the rhodolith banks as polyp?s skeletons were found nucleating rhodoliths. This study identified which organisms were agglutinating rhodolith nodules at Cabe?o da Sapata (45m deep) and if is there any relationship between physical characteristics of the bank and the occurrence of agglutinated complex. It was also described the physical structure and the frequency of occurrence of agglutinated rhodolith. Sponges was the main group of sessile fauna found coalescing rhodoliths and this process points to a relationship between size of the nodules and the variation in size between the nodes. The importance of sponges to the rhodoliths beds and potentially to the process of consolidated reefs formation is reinforced by this study. Os bancos de rodolitos tem despertado interesse cada vez maior da comunidade cient?fica, n?o sendo diferente para o Arquip?lago de Fernando de Noronha (AFN). No AFN os bancos de rodolitos ocorrem em profundidades de 10 a 100m e s?o habitat peculiares que aumentam a complexidade estrutural, propiciando um aumento da diversidade associada quando comparados com substratos n?o consolidados. A intera??o entre os rodolitos e por?feros ? o foco desse estudo. Nos bancos do AFN as esponjas desempenham um importante papel no mecanismo de estabiliza??o dos rodolitos, sendo respons?veis por aglutinar n?dulos pr?ximos, o que pode apontar para um estagio inicial de um processo permanente de estabiliza??o, na forma de um recife consolidado. A presen?a de recifes coral?neos no cost?o rochoso adjacente tamb?m podem ter rela??o com os bancos de rodolitos j? que esqueletos de p?lipos foram encontrados nucleando rodolitos. Neste estudo foram identificados quais organismos foram respons?veis pela aglutina??o de n?dulos do banco de rodolitos do Cabe?o da Sapata (45m de profundidade) e se existe rela??o entre caracter?sticas f?sicas do banco e a ocorr?ncia de aglutinados. Tamb?m foi descrita a estrutura f?sica e a frequ?ncia de ocorr?ncia de aglutinados de rodolitos. Por?fero foi o principal grupo da fauna s?ssil encontrado aglutinando rodolitos e esse processo aponta para uma rela??o entre tamanho dos n?dulos e a varia??o de tamanho entre os n?dulos. A import?ncia das esponjas nos bancos de rodolitos, e potencialmente no processo de forma??o de recifes consolidados, ? refor?ada pelo presente estudo
- Published
- 2015
47. Registro geológico holocênico de recifes submersos na plataforma de Abrolhos
- Author
-
Vieira, Laura Silveira, Moura, Rodrigo Leão de, Amado Filho, Gilberto Menezes, and Bastos, Alex Cardoso
- Subjects
Recifes e ilhas de coral ,Holoceno Tardio ,Plataforma de Abrolhos ,Composição Recifal ,Abrolhos, Arquipélago dos (BA) ,Geologia estratigráfica - Holoceno - Abstract
Submitted by Priscila Oliveira (priscila.b.oliveira@ufes.br) on 2016-07-11T18:56:35Z No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Dissertação de Mestrado_Laura Silveira Vieira.pdf: 5771317 bytes, checksum: ea1b4e05c2f2e96127db3a82d1034d99 (MD5) Approved for entry into archive by Patricia Barros (patricia.barros@ufes.br) on 2016-07-12T13:34:43Z (GMT) No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Dissertação de Mestrado_Laura Silveira Vieira.pdf: 5771317 bytes, checksum: ea1b4e05c2f2e96127db3a82d1034d99 (MD5) Made available in DSpace on 2016-07-12T13:34:43Z (GMT). No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Dissertação de Mestrado_Laura Silveira Vieira.pdf: 5771317 bytes, checksum: ea1b4e05c2f2e96127db3a82d1034d99 (MD5) Sistemas recifais são feições comuns ao longo de muitos litorais tropicais modernos e as evidências de suas ocorrências durante diferentes níveis do mar têm sido muito estudadas por todo o mundo. A Plataforma de Abrolhos (Brasil) engloba o mais importante sistema de recifes de coral no Atlântico Sul apresentando altos níveis de endemismo, baixa diversidade e morfologia única de crescimento (formações recifais conhecidas como "chapeirões"). O desenvolvimento recifal na plataforma se dá pela presença de dois arcos recifais rasos paralelos à costa, além de recifes afogados ao longo das porções centro-norte e sul da mesma. O principal objetivo deste estudo é investigar o registro geológico do processo evolutivo holocênico de dois ambientes recifais na região da Plataforma de Abrolhos. Para isso foram sondados dois recifes submersos com seus topos a 4 e 15 metros de profundidade, chamados respectivamente de recifes “Shallow Water” (SW) e “Deep Water” (DW), onde foram coletados oito testemunhos distribuídos nas direções vertical (a partir do topo recifal) e horizontal (perpendiculares às paredes do recife). Os testemunhos coletados tiveram recuperação variando entre 0,70 e 2,03 metros de comprimento. Foram observadas significativas formações de corais e de algas (espécies de corais como Mussismilia harttii., Millepora sp., Siderastrea sp., Porites sp., Favia sp. e Madracis sp.; e espécies de algas calcárias como Hydrolithon sp., Lithophyllum kotschyanum, Lithophyllum sp., Amphiroa sp., Mesophyllum erubescens e Sporolithon episporum). No entanto, verificou-se que os organismos mais abundantes na edificação recifal foram os briozoários da família Schizoporellidae. Grandes formações de briozoários incrustantes foram descritas em todos os testemunhos, compreendendo cobertura superior a 15% na superfície longitudinal dos mesmos e podendo alcançar cobertura de até 52,9% em dois deles. Porém, briozoários foram mais representativos nos testemunhos do recife “DW”. Contraditoriamente, a fraca concorrência espacial identificada nos briozoários incrustantes pode ser a explicação para a maior ocorrência destes organismos nos testemunhos do recife “DW”, onde organismos zooxantelados e fortes concorrentes espaciais em ambiente com grande incidência de radiação solar não conseguem se desenvolver. Datações utilizando radiocarbono evidenciaram que o recife “DW” é mais antigo que o recife “SW”, bem como um maior acúmulo recifal (e principalmente no topo recifal) no recife “SW” nos últimos mil anos. Pela presença de corais zooxantelados e algas características de ambientes rasos, sugere-se que toda a estrutura recifal analisada se desenvolveu em ambiente de baixa profundidade (< 30 metros) na plataforma continental. Coral Reef systems are common features throughout many modern tropical coastal zone and the evidence of their occurrence during different sea levels have been studied worldwide. The Abrolhos Shelf (Brazil) encompasses the most important coral reef system in the South Atlantic showing high levels of endemism, low diversity and unique growth (locally known as “chapeirões”). The reef system along the shelf is characterized by shallow reef arcs parallel to the coast, and “give-up” reefs throughout the north-central and southern shelf. The main objective of this study is to investigate the geological record showing the Late Holocene evolution of two submerged pinnacles in the Abrolhos Shelf. Herein, two submerged pinnacles were drilledwith their tops at 4 and 15 m below sea level, called "Shallow Water Reef" (SW) and "Deep Water Reef" (DW). A total of eight cores were collected. Vertical (top down) and horizontal (perpendicular to the pinnacle wall) cores were recovered, ranging from 0.70 to 2.03 m in length. Significant coralgal framework was observed in the cores (corals such species as Mussismilia harttii., Millepora sp., Siderastrea sp., Porites sp., Favia sp. and Madracis sp.; and coralline algae such species as Hydrolithon sp., Lithophyllum kotschyanum, Lithophyllum sp., Amphiroa sp., Mesophyllum erubescens and Sporolithon episporum). However, we found that by far the most abundant framebuilding component were Schizoporellidae bryozoans. Extensive encrusting bryozoans were identified in all cores comprising between 15 - 52,9% of 2D areas. Bryozoans were most representative in the "DW" cores. Paradoxically, the poor spatial competition of encrusting bryozoans must be the explanation for the bryozoan dominance in the "DW" cores, which hermatypic corals can not develop. Radiocarbon dates indicate that the "DW" reef is older than the "SW" reef as well as higher reef accumulation rates occur in the past thousand years is in the "SW" reef. The results show that the both reefs have been developed in a shallow shelf environment (
- Published
- 2015
48. Mapeamento de habitats marinhos no banco dos Abrolhos
- Author
-
Secchin, Nelio Augusto, Moura, Rodrigo Leão, Amado Filho, Gilberto Menezes, and Bastos, Alex Cardoso
- Subjects
Atlântico Sul, Oceano ,Megahabitats ,Habitat (Ecologia) ,Mapeamento de habitats ,Mapeamento geomorfológico ,Abrolhos, Arquipélago dos (BA) ,Mapping habitats ,Geofísica ,Oceanografia - Abstract
Submitted by Morgana Andrade (morgana.andrade@ufes.br) on 2016-07-04T20:10:54Z No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Dissertação_Secchin_Final.pdf: 4693409 bytes, checksum: 5679a36c3571a5915a720d1300aa6169 (MD5) Approved for entry into archive by Patricia Barros (patricia.barros@ufes.br) on 2016-07-08T17:33:05Z (GMT) No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Dissertação_Secchin_Final.pdf: 4693409 bytes, checksum: 5679a36c3571a5915a720d1300aa6169 (MD5) Made available in DSpace on 2016-07-08T17:33:05Z (GMT). No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Dissertação_Secchin_Final.pdf: 4693409 bytes, checksum: 5679a36c3571a5915a720d1300aa6169 (MD5) A plataforma continental tropical é composta por um mosaico de megahabitats que suportam uma alta diversidade de habitats, e atualmente vêm sofrendo com as pressões antrópicas. O desenvolvimento e a aplicação de geotecnologias em estudos de mapeamento do substrato marinho vêm proporcionando um aumento no conhecimento dos habitats bentônicos. Importante formação coralínea do Atlântico Sul, a Plataforma dos Abrolhos, não possui informações suficientes que possibilitem uma gestão efetiva. O presente estudo tem com objetivo apresentar uma distribuição espacial e caracterização dos domínios dos principais megahabitats da Plataforma dos Abrolhos. Para tal, foram utilizados dados diretos e indiretos de investigação geológica, com uma combinação metodológica englobando levantamentos de SVL, ecobatímetro monofeixe e ROV, sendo base para uma classificação hierárquica dos megahabitats e integração com dados pretéritos levantados. Alcançando uma representação interpretativa dos tipos de fundo da região estudada (50.500km²), a aplicação metodológica possibilitou gerar uma nova visão para a Plataforma dos Abrolhos. Foram identificados os domínios de megahabitat Recifal (17%), Rodolito (51%), bem como as principais feições de cada um, ocorrendo com variações na distribuição e ocorrência em relação à disposição ao perfil batimétrico. Uma estrutura recifal que ocorre juntamente com o domínio de rodolitos, as Buracas, é um habitat particular que pode ter uma importância significativa para o ecossistema de Abrolhos. A metodologia aplicada foi satisfatória na geração de uma representação da distribuição e descrição de megahabitats marinhos para toda a Plataforma dos Abrolhos. Oferecendo, assim, uma nova abordagem em estudos de delineamento de habitats marinhos aplicados na costa brasileira, sendo importante pela área espacial representada, contida em uma região singular onde havia uma lacuna no conhecimento sobre a distribuição e caracterização deste habitat em toda a sua extensão. The continental shelf is composed of a tropical mosaic megahabitats that support a high diversity of habitats, and now have suffered from anthropogenic pressures. The development and application of geo-mapping studies of the marine substrate has provided increased knowledge of benthic habitats. The most important coral reef formation of the South Atlantic, Abrolhos Platform, does not have sufficient information to enable effective management. The present study aims at presenting a spatial distribution and characterization of the major fields of the Platform of the Abrolhos' megahabitats. To this end, we used data from direct and indirect geological research, with a combination of surveys covering methodological SSS, and echo sounder, ROV, and the basis for a hierarchical classification of megahabitats and integration with past data collected. Reaching an interpretative representation of the types of background of the region studied (50.500km²), the methodological application was able to generate a new vision for the Platform of the Abrolhos. We identified areas of reef megahabitat (17%), Rhodolite (51%) as well as the main features of each, with variations occurring in the distribution and occurrence in relation to the available bathymetric profile. A reef structures that occurs with the domain Rhodolite, the Buracas, is a particular habitat that may have a significant importance for the ecosystem of Abrolhos. The methodology was applied to generate a satisfactory representation of the distribution and description of marine megahabitats for the entire Abrolhos Platform. Thus offering a new approach to design studies of applied marine habitats along the Brazilian coast, is important for the space represented, contained in a unique region where there was a gap in knowledge about the distribution and characterization of this habitat throughout its length.
- Published
- 2011
49. Cell wall physicochemical properties determine the thallus biomineralization pattern of Padina gymnospora (Phaeophyceae).
- Author
-
de Carvalho RT, Rocha GM, Paradas WC, Soares AR, Ank Guarino G, Passos RMF, Amado Filho GM, Farina M, and Salgado LT
- Subjects
- Brazil, Cell Wall physiology, Cell Wall ultrastructure, Phaeophyceae ultrastructure, Calcification, Physiologic, Calcium Carbonate metabolism, Phaeophyceae physiology
- Abstract
Approximately half of the Padina (Dictyotales, Phaeophyceae) species mineralize aragonite needles over the adaxial thallus surface, where mineral bands are interspersed with nonmineralized regions along the thallus from the apical to basal end. However, this calcification pattern and the related algal properties are not well understood. Therefore, this work was performed to elucidate a potential role of cell walls in the inhibition/induction of mineralization in the brown alga Padina gymnospora. In a comparison of specific thallus regions, differences were identified in the cellulose distribution, microfibrils arrangement and thickness, distribution and abundance of phenolic substances, and physical differences among the surfaces of the thallus (deformation, adhesion, topography, and nano-rugosity). In vitro mineralization assays indicated that phenolic substances are strong modulators of calcium carbonate crystals growth. In addition, de novo mineralization assays over cell wall surfaces that were used as templates, even without cellular activity, indicated that the cell wall remains a key factor in the induction/inhibition of mineralization. Overall, the current findings indicate a strong correlation between the physico-chemical and structural properties of the cell wall and the alternation pattern of the mineralization bands over the thallus of P. gymnospora., (© 2017 Phycological Society of America.)
- Published
- 2017
- Full Text
- View/download PDF
50. Knowledge of Brazilian benthic marine fauna throughout time.
- Author
-
Longo Lde L and Amado Filho GM
- Subjects
- Brazil, History, 18th Century, History, 19th Century, History, 20th Century, History, 21st Century, Research, Biodiversity, Marine Biology history
- Abstract
The ecosystems of Brazil's continental shelf and oceanic islands comprise a variety of environments that display unique geomorphological and geophysical features and biotic components. The quest to attain knowledge of Brazilian marine fauna is hampered by coastline length, biodiversity, a high rate of endemism, and a shortage of specialized researchers. Based on a systematic bibliographic review, the article offers an overview of the history, current knowledge, and outlook for the field of marine biodiversity in Brazil. Our findings show that government initiatives have afforded greater knowledge of Brazilian marine fauna species and opened new perspectives, including reliance on complex tools to describe benthic marine habitats in terms of their geological, geophysical, and biotic composition.
- Published
- 2014
- Full Text
- View/download PDF
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