Does environmental variability in Atlantic Forest streams affect aquatic hyphomycete and invertebrate assemblages associated with leaf litter?

Autor: Ebling, Lucas Abbadi, Pastore, Bruna Luisa, Biasi, Cristiane, Hepp, Luiz Ubiratan, Restello, Rozane Maria
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Zdroj: Hydrobiologia; Apr2024, Vol. 851 Issue 7, p1761-1777, 17p
Abstrakt: We aimed to understand how the environmental variability produced by water parameters, land use, and land cover in small streams affects aquatic hyphomycete and invertebrate assemblages associated with leaf litter. Land use and land cover were quantified in the drainage area of streams located in the subtropical portion of the Atlantic Forest. We incubated Nectandra megapotamica leaves in streams and, after 30 days, collected decomposing litter to analyze associated aquatic hyphomycetes and invertebrates. Dissolved oxygen was associated with the distribution of aquatic hyphomycetes. On the other hand, 4,068 aquatic invertebrates were found, assigned into five functional feeding groups (FFG). Native vegetation and water temperature were the variables responsible for structuring the invertebrate assemblages associated with detritus. Native vegetation, dissolved oxygen, and total dissolved nitrogen were responsible for the structuring of FFGs. Streams that showed high rates of agriculture and urbanization in the drainage area showed low leaf mass loss. Our study demonstrated that the presence of anthropic uses and reduced native vegetation in the drainage area affected the assemblages of aquatic hyphomycetes and shredders, which are key players in the process of leaf decomposition in streams. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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