Please use this identifier to cite or link to this item: http://repositorio.ufla.br/jspui/handle/1/56899
Title: Which metrics drive macroinvertebrate drift in neotropical sky island streams?
Keywords: Biodiversity conservation
Stream processes
Macroinvertebrate functional groups
Water quality
Serra do espinhaço
Conservação da Biodiversidade
Fluxo de processos
Grupos funcionais de macroinvertebrados
Água - Qualidade
Issue Date: Jan-2023
Publisher: Elsevier
Citation: CALLISTO, M. et al. Which metrics drive macroinvertebrate drift in neotropical sky island streams? Water Biology and Security, Wuhan, v. 2, n. 1, 100077, Jan. 2023. DOI: https://doi.org/10.1016/j.watbs.2022.100077.
Abstract: Despite long-standing interest, the mechanisms driving aquatic macroinvertebrate drift in tropical streams remain poorly understood. Therefore, the objective of this study was to evaluate which environmental metrics drive macroinvertebrate drift in neotropical sky island streams. We evaluated whether altitude, the abundance of food resources, and variations in water quality influenced macroinvertebrate drift density, diversity, richness, and functional feeding groups. An hypothesis was developed to test whether increased altitude, lower food availability (particulate organic matter), and discharge would increase the density, taxonomic richness, and diversity of drifting invertebrates. Nine headwater stream sites were sampled in the rainy and dry seasons in the Espinhaço Meridional Mountain Range (EMMR) of southeast Brazil. Samples were collected using drift nets deployed from 5:00 p.m. to 8:00 p.m. The abundance of food resources was assessed through estimates of coarse (CPOM) and fine (FPOM) particulate organic matter, and primary producers. CPOM availability was an important explanatory variable for Gathering-Collectors and Scrapers, Altitude was important for Shredders and Predators, and Filtering-Collectors were linked to water discharge, suggesting that functional group drift masses were linked to different ecosystem components. Water temperature, conductivity, dissolved oxygen, current velocity, FPOM biomass and microbasin elevation range exerted little influence on macroinvertebrate drift. Regarding taxa composition, this study also found that Baetidae and Leptohyphidae (Ephemeroptera) and Chironomidae and Simuliidae (Diptera) were the most abundant groups drifting.
URI: http://repositorio.ufla.br/jspui/handle/1/56899
Appears in Collections:DBI - Artigos publicados em periódicos

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