2023 Early Hearing Detection & Intervention Conference

March 5-7, 2023 • Cincinnati, OH

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5/26/2021 | 8:30 AM - 10:30 AM | DISTRIBUTION OF MACROINVERTEBRATE FAMILIES IN THE LOWER MIDDLE BASIN OF THE GUALEGUAYCHÚ RIVER | Virtual Platform

DISTRIBUTION OF MACROINVERTEBRATE FAMILIES IN THE LOWER MIDDLE BASIN OF THE GUALEGUAYCHÚ RIVER

Benthic macroinvertebrates (BM) are organisms used as bioindicators since their structure reflects disturbances in the environment. During 2012-2019, the distribution of BM in the lower-middle basin of the Gualeguaychú River was evaluated through sampling in 8 streams, 4 rural (SR), 2 periurban (SP) and 2 urban (SU), BM samples were taken from both margins and the center of the main channel using dredge and D-net. The organisms were taxonomically identified and its distribution was studied qualitatively using the Jaccard index with Principal Coordinate Analysis (PCoA), Cluster (C), and Similarity-Dissimilarity (SD). 75 taxa MB were found. The PCoA and C analysis concentrated the streams in two groups, SR and SP-SU. The SD analysis correlated the SRs by presenting more families of the phylum Arthropoda, and the SPs with the SUs by dominating families of the phylum Mollusca. MB they reflected a higher level of alteration in the SPs and SUs than in the SRs, by presenting fewer number families, predominating those tolerant to environments rich in organic matter, such as Planorbiidae, Cochliopidae, Ampullaridae, Sphaeriidae and Corbiculidae. BM were a tool that provided important information on the status of the monitored streams.

Urban streams
Organic matter
Biodiversity

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Presenters/Authors

Luciana Percara (), Laboratorio de Indicadores Biológicos y Gestión Ambiental de Calidad de Agua (IBGA), Facultad de Ciencia y Tecnología de la Universidad Autónoma de Entre Ríos (FCyT-UADER), lucianapercara011@hotmail.com;