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Título : The role of turnover in structuring subterranean aquatic communities in Southeastern Brazil
Autor : ZEPON, TAMIRES
BICHUETTE, MARIA ELINA
Palabras clave : abiotic variables;beta diversity;caves;conservation;dispersion;river basin
Fecha de publicación : 2024
Resumen : 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.
metadata.dc.source: An Acad Bras Cienc
metadata.dc.type: Artigo
metadata.dc.totalpage: 9
metadata.dc.localofdeposit: 10.1590/0001-3765202420230194
URI : https://repositorio.icmbio.gov.br/handle/cecav/2286
ISSN : 0001-3765
Aparece en las colecciones: BIOLOGIA SUBTERRÂNEA

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