The floating Sargassum (Phaeophyceae) of the South Atlantic Ocean – likely scenarios
| Autor: | G.K. Ameka, José Marcos de Castro Nunes, Mariana Cabral de Oliveira, Felipe Gusmão, Pio Colepicolo, Cícero Alves-Lima, Rafael Riosmena-Rodríguez, Gang Liu, Kweku de Graft-Johnson, Jim Gower, Leonardo Rubi Rörig, Marcos B. Lucena, Paulo Antunes Horta, Maria Teresa Menezes de Széchy, José Eduardo Martinelli-Filho, Daniela Milstein, Maria Beatriz Barbosa de Barros Barreto, José Bonomi Barufi, Eduardo Bastos, Fabio Nauer, Lidiane Gouvea, Thayná Jeremias Mello, Marina Nasri Sissini, Letícia Veras Costa Lotufo, Beatriz N. Torrano-Silva |
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| Rok vydání: | 2017 |
| Předmět: |
0106 biological sciences
Biomass (ecology) biology Ecology 010604 marine biology & hydrobiology Pelagic zone Plant Science Aquatic Science biology.organism_classification BIOLOGIA MOLECULAR 010603 evolutionary biology 01 natural sciences Sargassum Biological dispersal Seawater Epiphyte Fucales Invertebrate |
| Zdroj: | Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual) Universidade de São Paulo (USP) instacron:USP |
| ISSN: | 2330-2968 0031-8884 |
| Popis: | This study represents the efforts of a network of researchers to characterise the large, floating Sargassum (Fucales, Phaeophyceae) biomass that had reached the Brazilian coast in 2014 and 2015. Material collected during these events was identified as Sargassum natans and S. fluitans using morphological characteristics; ITS2 sequences showed low divergence (0%–3%) with sequences of nine other Sargassum species. Several epiphytic macroalgae, invertebrates and fishes were associated with the floating Sargassum. Satellite images did not support the hypothesis of slicks moving south from the Sargasso Sea in the northern Atlantic Ocean. This strengthens the hypothesis that there is a matrix of pelagic Sargassum in the central Atlantic Ocean and that biomass accumulation should be considered a result of the combination of physicochemical seawater conditions and biological interactions. The biomass accumulation of the stranded Sargassum was estimated during four events, peaking in 98 kg m−2 wet weight ... |
| Databáze: | OpenAIRE |
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