Benthic fauna along sandy beaches enriched by metals after mining disaster
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Published:2024-01-11
Issue:
Volume:726
Page:181-196
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ISSN:0171-8630
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Container-title:Marine Ecology Progress Series
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language:en
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Short-container-title:Mar. Ecol. Prog. Ser.
Author:
Brahim S12, Sobrinho TG3, Albino J3, Zanetti G1, Amaral VS1, Carneiro MTWD4, Souza JR5, Castro LB4, Muehe D4, Souza BS4, Brandão GP4, Krause M4, Oliveira LHS4, Coelho UP4, Silva EE1, Silva IJ13, Neves JA1, Paiva-Tagliari D4, Costa KG1
Affiliation:
1. Laboratório de Ecologia Bentônica, Centro Universitário Norte do Espírito Santo CEUNES, Universidade Federal do Espírito Santo UFES, 29932540 São Mateus, Espírito Santo, Brazil 2. Programa de Pós-graduação em Biodiversidade e Evolução, Instituto de Biologia, Universidade Federal da Bahia UFBA, 40170115 Salvador, Bahia, Brazil 3. Programa de Pós-graduação em Biologia Animal, Universidade Federal do Espírito Santo UFES, 29075910 Vitória, Espírito Santo, Brazil 4. Laboratório de Geomorfologia e Sedimentologia Costeira, Universidade Federal do Espírito Santo UFES, 29075910 Vitória, Espírito Santo, Brazil 5. Laboratório de Ciências Químicas, Centro de Ciências Exatas e Tecnologia, Universidade Estadual do Norte Fluminense UENF, 28013602 Campos dos Goytacazes, Rio de Janeiro, Brazil
Abstract
In 2015, 60 million tons of ore tailings from the Fundão dam failure entered the Doce River basin, Brazil, and reached surrounding sandy beaches. This study evaluated the influence of sedimentology and morphology of beaches that received mining tailings on chemical element concentrations and consequent benthic community responses. We collected sediments for physical (granulometry, heavy mineral, and calcium carbonate content) and geochemical (chemical elements) analyses and biological diversity parameters (benthic macro- and meiofauna density, richness, and composition) on 8 beaches with different morphodynamic types. Beaches with more dissipative characteristics retained the highest contents of mud, As, Fe, Mn, V, and heavy minerals, present in the tailings. We also recorded the lowest density and richness of macrofauna on these beaches, compared to more reflective beaches. These results contradict the global trend, suggesting that anthropic disturbances outweigh the effects of morphodynamics in structuring the benthic fauna community, mainly in dissipative sandy beaches.
Publisher
Inter-Research Science Center
Subject
Ecology,Aquatic Science,Ecology, Evolution, Behavior and Systematics
Reference105 articles.
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