The role of turnover in structuring subterranean aquatic communities in Southeastern Brazil

Autor(es)

TAMIRES ZEPON ; MARIA ELINA BICHUETTE ^[2]

• Tipo de documento: Artigo Científico
• Fonte: Anais da Academia Brasileira de Ciências; v. 96, n. 2 2024-05-10.

Resumo

Abstract Similarly to other animal communities, the diversity of subterranean aquatic fauna is influenced by several factors and processes, such as habitat fragmentation, dispersion, environmental heterogeneity, and physical and chemical water characteristics. Here, we studied cave aquatic communities of the Alto Ribeira hydrographic basin, regarding troglobitic and non-troglobitic species, located in a single karst area to evaluate the influence of sub-basins in fauna differentiation. We investigated how abiotic variables (flow, electrical conductivity, temperature, pH, and substrate) influence the fauna composition and the contribution of beta diversity components (nestedness and turnover) in explaining communities’ dissimilarities. Fauna composition differed between sub-basins, as most species did not co-occur in different caves. Caves with higher flow and substrate diversity were the richest. In addition, each cave community was influenced by a unique set of abiotic variables. Dissimilarity among caves was mainly explained by turnover, and our findings suggest the restricted species distribution could be due to ecological (e.g., limited dispersion capacity, tolerance to abiotic variables), hydrogeological (e.g., dispersion barriers, isolation of sub-basins), and historical (e.g., colonization, paleoclimatic events) factors and processes. Therefore, different elements are responsible for determining the composition of cave aquatic communities in different sub-basins, reflecting the variability within a single karst area. (AU)

• Processo FAPESP: 10/08459-4 - As áreas cársticas de São Desidério, serra do Ramalho (sudoeste da Bahia) e São Domingos (nordeste de Goiás) representam hot spots de biodiversidade? Análise das comunidades cavernícolas e critérios para sua proteção
• Beneficiário: Maria Elina Bichuette
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 08/05678-7 - Ecologia populacional e comportamento de peixes subterrâneos brasileiros, gêneros Glaphyropoma e Copionodon Pinna, 1992 (Siluriformes: Trichomycteriadae: Copionodontinae) da Chapada Diamantina, Bahia central
• Beneficiário: Maria Elina Bichuette
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 08/57949-4 - Instituto de Estudos dos Hymenoptera Parasitóides da Região Sudeste Brasileira - IEHYPA - Sudeste
• Beneficiário: Angélica Maria Penteado Martins Dias
• Modalidade de apoio: Auxílio à Pesquisa - Temático