Bathymetric distribution of brachyuran crabs: Alpha and beta diversity variation in an upwelling area

Autor(es)

Sousa, Aline Nonato ^[1] ; Bernardes, Veronica Pereira ^[1] ; Bernardo, Camila Hipolito ^[1] ; Silva, Thiago Elias ^[1] ; Sancinetti, Gustavo Sergio ^[1] ; Costa, Rogerio Caetano ^{[1, 2]} ; Fransozo, Adilson ^[1]

Afiliação do(s) autor(es)

^[1] Sao Paulo State Univ, Grp Studies Crustacean Biol Ecol & Culture, Inst Biosci Botucatu, Lab Carcinol NEBECC, Dept Zool, UNESP, Botucatu, SP - Brazil

^[2] Sao Paulo State Univ, Lab Biol Marine & Freshwater Shrimp LABCAM, Dept Biol Sci, Fac Sci, UNESP, Bauru, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: MARINE ECOLOGY-AN EVOLUTIONARY PERSPECTIVE; v. 42, n. 3 MAR 2021.
• Citações Web of Science: 1

Resumo

Biodiversity studies might help to understand the ecological dynamics of regions under the influence of upwelling and serve as a baseline to conservation and management strategies. Here, we evaluated the alpha (species richness and Shannon-Wienner index - H') and beta (Bray Curtis index) diversities of a Brachyura assemblage within a depth gradient (5, 10, 15, 25, 35, and 45 m) in the Macae region, State of Rio de Janeiro, Brazil. A total of 1,221 decapod individuals were sampled, comprising 11 species .The highest diversity index was recorded at 5 m in depth and the lowest at 25 m. The ecological indexes (diversity and evenness indexes) were inversely proportional to the organic matter and phi (sediment texture). This finding suggests that the heterogeneous sediment of shallow areas increases habitat complexity, therefore increasing biodiversity. Since the study area is an upwelling zone, the coastal area is more affected by cold-water masses, leading to a distinct biodiversity distribution when compared with regions that are not under the influence of upwelling. Considering these peculiarities, the importance of coastal areas to the biodiversity of regions affected by upwelling becomes evident. Such areas must have differential importance when conducting environmental conservation and management projects. (AU)

• Processo FAPESP: 09/54672-4 - Biologia reprodutiva e dinâmica populacional dos camarões Penaeoidea (Crustacea, Decapoda) em duas regiões do sudeste brasileiro: efeito latitudinal e proposta para o período de defeso
• Beneficiário: Rogério Caetano da Costa
• Modalidade de apoio: Auxílio à Pesquisa - Regular