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Chronic trace metals effects of mine tailings on estuarine assemblages revealed by environmental DNA

Mine tailing disasters have occurred worldwide and contemporary release of tailings of large proportions raise concerns of the chronic impacts that trace metals may have on the aquatic biodiversity. Environmental metabarcoding (eDNA) offers an as yet poorly explored opportunity for biological monito...

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Autores principales: Bernardino, Angelo F., Pais, Fabiano S., Oliveira, Louisi S., Gabriel, Fabricio A., Ferreira, Tiago O., Queiroz, Hermano M., Mazzuco, Ana Carolina A.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: PeerJ Inc. 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6842558/
https://www.ncbi.nlm.nih.gov/pubmed/31720128
http://dx.doi.org/10.7717/peerj.8042
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author Bernardino, Angelo F.
Pais, Fabiano S.
Oliveira, Louisi S.
Gabriel, Fabricio A.
Ferreira, Tiago O.
Queiroz, Hermano M.
Mazzuco, Ana Carolina A.
author_facet Bernardino, Angelo F.
Pais, Fabiano S.
Oliveira, Louisi S.
Gabriel, Fabricio A.
Ferreira, Tiago O.
Queiroz, Hermano M.
Mazzuco, Ana Carolina A.
author_sort Bernardino, Angelo F.
collection PubMed
description Mine tailing disasters have occurred worldwide and contemporary release of tailings of large proportions raise concerns of the chronic impacts that trace metals may have on the aquatic biodiversity. Environmental metabarcoding (eDNA) offers an as yet poorly explored opportunity for biological monitoring of impacted aquatic ecosystems from mine tailings and contaminated sediments. eDNA has been increasingly recognized to be an effective method to detect previously unrecognized small-sized Metazoan taxa, but their ecological responses to environmental pollution has not been assessed by metabarcoding. Here, we evaluated chronic effects of trace metal contamination from sediment eDNA of the Rio Doce estuary, 1.7 years after the Samarco mine tailing disaster, which released over 40 million m(3) of iron tailings in the Rio Doce river basin. We identified 123 new sequence variants environmental taxonomic units (eOTUs) of benthic taxa and an assemblage composition dominated by Nematoda, Crustacea and Platyhelminthes; typical of other estuarine ecosystems. We detected environmental filtering on the meiofaunal assemblages and multivariate analysis revealed strong influence of Fe contamination, supporting chronic impacts from mine tailing deposition in the estuary. This was in contrast to environmental filtering of meiofaunal assemblages of non-polluted estuaries. Here, we suggest that the eDNA metabarcoding technique provides an opportunity to fill up biodiversity gaps in coastal marine ecology and may become a valid method for long term monitoring studies in mine tailing disasters and estuarine ecosystems with high trace metals content.
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spelling pubmed-68425582019-11-12 Chronic trace metals effects of mine tailings on estuarine assemblages revealed by environmental DNA Bernardino, Angelo F. Pais, Fabiano S. Oliveira, Louisi S. Gabriel, Fabricio A. Ferreira, Tiago O. Queiroz, Hermano M. Mazzuco, Ana Carolina A. PeerJ Environmental Impacts Mine tailing disasters have occurred worldwide and contemporary release of tailings of large proportions raise concerns of the chronic impacts that trace metals may have on the aquatic biodiversity. Environmental metabarcoding (eDNA) offers an as yet poorly explored opportunity for biological monitoring of impacted aquatic ecosystems from mine tailings and contaminated sediments. eDNA has been increasingly recognized to be an effective method to detect previously unrecognized small-sized Metazoan taxa, but their ecological responses to environmental pollution has not been assessed by metabarcoding. Here, we evaluated chronic effects of trace metal contamination from sediment eDNA of the Rio Doce estuary, 1.7 years after the Samarco mine tailing disaster, which released over 40 million m(3) of iron tailings in the Rio Doce river basin. We identified 123 new sequence variants environmental taxonomic units (eOTUs) of benthic taxa and an assemblage composition dominated by Nematoda, Crustacea and Platyhelminthes; typical of other estuarine ecosystems. We detected environmental filtering on the meiofaunal assemblages and multivariate analysis revealed strong influence of Fe contamination, supporting chronic impacts from mine tailing deposition in the estuary. This was in contrast to environmental filtering of meiofaunal assemblages of non-polluted estuaries. Here, we suggest that the eDNA metabarcoding technique provides an opportunity to fill up biodiversity gaps in coastal marine ecology and may become a valid method for long term monitoring studies in mine tailing disasters and estuarine ecosystems with high trace metals content. PeerJ Inc. 2019-11-07 /pmc/articles/PMC6842558/ /pubmed/31720128 http://dx.doi.org/10.7717/peerj.8042 Text en © 2019 Bernardino et al. https://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, reproduction and adaptation in any medium and for any purpose provided that it is properly attributed. For attribution, the original author(s), title, publication source (PeerJ) and either DOI or URL of the article must be cited.
spellingShingle Environmental Impacts
Bernardino, Angelo F.
Pais, Fabiano S.
Oliveira, Louisi S.
Gabriel, Fabricio A.
Ferreira, Tiago O.
Queiroz, Hermano M.
Mazzuco, Ana Carolina A.
Chronic trace metals effects of mine tailings on estuarine assemblages revealed by environmental DNA
title Chronic trace metals effects of mine tailings on estuarine assemblages revealed by environmental DNA
title_full Chronic trace metals effects of mine tailings on estuarine assemblages revealed by environmental DNA
title_fullStr Chronic trace metals effects of mine tailings on estuarine assemblages revealed by environmental DNA
title_full_unstemmed Chronic trace metals effects of mine tailings on estuarine assemblages revealed by environmental DNA
title_short Chronic trace metals effects of mine tailings on estuarine assemblages revealed by environmental DNA
title_sort chronic trace metals effects of mine tailings on estuarine assemblages revealed by environmental dna
topic Environmental Impacts
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6842558/
https://www.ncbi.nlm.nih.gov/pubmed/31720128
http://dx.doi.org/10.7717/peerj.8042
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