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The presence of macrophytes changes the beta diversity of Ephemeroptera, Plecoptera, and Trichoptera (EPT) assemblages in Cerrado streams in Northeastern Brazil

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Abstract

In-stream conditions can affect the distribution of the Ephemeroptera, Plecoptera, and Trichoptera orders (EPT) because they require specific food resources and good quality water. Therefore, we evaluated the association between the different facets of the EPT diversity (genera richness, beta diversity, and abundance of individuals) and an environmental gradient in Cerrado streams from the State of Maranhão, Brazil. We tested the hypothesis that macrophyte coverage is the most important predictor of the EPT communities. We sampled EPT communities and a set of ten environmental variables in 20 streams with different proportions of macrophyte cover. We sampled over 3700 macroinvertebrate specimens representing 36 genera and 14 EPT families. Our results show that the overall habitat conditions are important for the EPT communities. Macrophyte coverage, particularly, drives the biggest changes in beta diversity. Thus, we suggest that macrophyte cover should be considered in ecological studies of aquatic assemblages, especially in Cerrado regions, where streams naturally have a greater light input.

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Acknowledgements

We thank the Pró-Reitoria de Pesquisa e Pós-Graduação (PPG/UEMA) for providing an scholarship to Daiana Sousa da Silva Araujo and the Programa de Pós-Graduação em Biodiversidade, Ambiente e Saúde (PPGBAS) for logistical support. We are also grateful to Brazilian National Council for Scientific and Technological Development (CNPq) for granting a research productivity fellowship to LSB (305929/2022-4). We are grateful to students of the Laboratory of Aquatic Entomology at CESC-UEMA for their assistance with the collection, processing, and identification of the EPT specimens.

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DSdSA, LSB, UMP, CASdA and LRCL contributed to the conception and design of the study. The material and environmental data were collected by DSdSA. The data were analyzed and discussed by DSdSA, LSB and LRCL. The first draft of the manuscript was written by DSdSA and all the authors commented on the previous versions of the manuscript, read and approved the final manuscript.

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Correspondence to Leandro Schlemmer Brasil.

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da Silva Araujo, D.S., Brasil, L.S., Pozzobom, U.M. et al. The presence of macrophytes changes the beta diversity of Ephemeroptera, Plecoptera, and Trichoptera (EPT) assemblages in Cerrado streams in Northeastern Brazil. Limnology 24, 161–169 (2023). https://doi.org/10.1007/s10201-023-00714-9

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  • DOI: https://doi.org/10.1007/s10201-023-00714-9

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