Asymmetric effects of changes in the habitat-forming algae Sargassum on different associated mobile faunas along Sao Paulo coast, Brazil

Autor(es)

Leite, Fosca P. P. ^[1] ; Bottcher, Claudia ^[1] ; Lewinsohn, Ilana D. A. ^[1] ; Siqueira, Silvana G. L. ^[1] ; Mansur, Karine F. R. ^[2] ; Longo, Pedro A. S. ^[3] ; Vieira, Edson A. ^[4]

Afiliação do(s) autor(es)

^[1] Univ Estadual Campinas UNICAMP, Dept Biol Anim, Inst Biol, Campinas - Brazil

^[2] Univ Estadual Campinas UNICAMP, Programa Posgrad Biol Anim, Campinas - Brazil

^[3] Univ Estadual Campinas UNICAMP, Programa Posgrad Ecol, Campinas - Brazil

^[4] Univ Fed Rio Grande Norte UFRN, Ctr Biociencias, Dept Oceanog & Limnol, Lab Ecol Marinha, BR-5901400 Natal, RN - Brazil

• Tipo de documento: Artigo Científico
• Fonte: MARINE ECOLOGY-AN EVOLUTIONARY PERSPECTIVE; v. 42, n. 3 MAR 2021.
• Citações Web of Science: 0

Resumo

Macroalgae constitute an important habitat for several marine invertebrates, and their biomass and structural complexity modulates the abundance and diversity of species that live on them. Overall, fluctuations in algae biomass inflict fluctuations in the abundance of the associated mobile macrofauna, but the structure of the community may vary according to how each group/species uses the resources provided by the algal habitat. Here, we evaluated how temporal variations in the biomass of Sargassum algal bed (increase, decrease, or maintenance) can affect the abundance, density, and assemblage structure of distinct associated faunistic groups. The collections were performed in three rocky shores located on the north coast of Sao Paulo, southeastern Brazil, during Fall and Spring. We observed different patterns of algal substrate variation between sampling events, and this reflected on variable effects on the associated fauna. The algal substrate reduction was accompanied by the reduction in the abundance and density of all associated faunal groups. However, the increase or maintenance of the algal substrate was accompanied by an increase in the abundance of peracarids, due to the dominance of herbivorous species, while other taxonomic groups like mollusks and polychaetes decreased or maintained their abundance, although with higher species evenness of gastropods when alga increases. Seasonal biomass variations in macroalgae beds are relevant for the dynamics of its associated fauna, and our results indicate that some taxonomic groups may preferentially use the available extra resources originated from biomass increment when compared to other groups. (AU)

• Processo FAPESP: 01/08861-8 - Fauna associada ao fital da Ilha dos Porcos Pequenos da região de Picinguaba, Ubatuba, litoral norte do estado de São Paulo: comparação temporal da composição e abundância da fauna de peracáridos
• Beneficiário: Claudia Bottcher
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica
• Processo FAPESP: 98/07090-3 - Biodiversidade marinha bêntica no Estado de São Paulo
• Beneficiário: Antonia Cecília Zacagnini Amaral
• Modalidade de apoio: Auxílio à Pesquisa - Programa BIOTA - Temático
• Processo FAPESP: 01/08859-3 - Fauna associada ao fital da Ilha dos Porcos Pequenos da região de Picinguaba, Ubatuba, litoral norte do estado de São Paulo: comparação temporal da composição e abundância da macro e meio fauna
• Beneficiário: Ilana Daniella Araujo Lewinsohn
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica
• Processo FAPESP: 02/01199-0 - Benthic marine biodiversity in the State of São Paulo
• Beneficiário: Silvana Gomes Leite Siqueira
• Modalidade de apoio: Bolsas no Brasil - Programa Capacitação - Treinamento Técnico