Spatial and temporal taxonomic and functional beta diversity of macroinvertebrate assemblages along a tropical dammed river

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NETL
NSTL
Springer Nature

外文摘要：Tropical freshwater ecosystems are essential for supporting biodiversity and providing crucial ecosystem services. However, these ecosystems face increasing threats from human activities, including the construction of hydropower dams. We investigated how the spatial and temporal taxonomic and functional β-diversity of aquatic macroinvertebrate assemblages varied above and below the Pandeiros River Dam, which is the first dam planned for decommissioning in South America. Integrating spatial and temporal perspectives is essential for understanding ecological community dynamics. We evaluated macroinvertebrate assemblages at eight sites over a period of 6 years, spanning five rainy and dry seasons. Our results revealed that turnover was the predominant component of taxonomic β-diversity spatially and temporally, whereas nestedness exerted a substantial role in shaping functional β-diversity. In addition, we observed higher values of taxonomic temporal p-diversity (TBI) compared with functional TBI. Finally, P-diversity decreased temporally. This study provides: (1) valuable knowledge regarding the spatial and temporal dynamics of the dammed Pandeiros River macroinvertebrate assemblages, as well as those of similar run-of-river dam/reservoir systems; (2) a foundation for the biological effects in case the dam is decommissioned; and (3) increased understanding of temporal assemblage dynamics. By shedding light on the spatial and temporal dynamics in dammed ecosystems, our research serves as a foundation for future monitoring and conservation efforts in tropical freshwater rivers, including how they may respond to dam breaching or removal.

外文关键词：

Temporal beta diversityHydropower damFreshwater conservationBioindicators

作者：

Diego M. P. Castro、Pedro H. M. do Amaral、Eduardo van den Berg、Robert M. Hughes、Marcos Callisto

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作者单位：

Departamento de Genetica, Ecologia e Evolucao, Universidade Federal de Minas Gerais, Instituto de Ciencias Biologicas, Av. Antonio Carlos 6627, Pampulha, Belo Horizonte, MG CEP 31270-901, Brazil||Departamento de Ecologia e Conservacao, Universidade Federal de Lavras, Instituto de Ciencias Naturais, Avenida Doutor Sylvio Menicucci, 3037, Lavras, MG CEP 37200-900, Brazil

Departamento de Ecologia e Conservacao, Universidade Federal de Lavras, Instituto de Ciencias Naturais, Avenida Doutor Sylvio Menicucci, 3037, Lavras, MG CEP 37200-900, Brazil

Amnis Opes Institute, 2895 SE Glenn, Corvallis, OR 97333, USA||Department of Fisheries, Wildlife, & Conservation Sciences, Oregon State University, 104 Nash, Corvallis, OR 97331, USA

Departamento de Genetica, Ecologia e Evolucao, Universidade Federal de Minas Gerais, Instituto de Ciencias Biologicas, Av. Antonio Carlos 6627, Pampulha, Belo Horizonte, MG CEP 31270-901, Brazil

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出版年：

2025

DOI：

10.1007/s00027-025-01165-3

Aquatic sciences

SCI

ISSN：1015-1621

年,卷(期)：2025.87(2)

参考文献量73