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Mar Pollut Bull. 2018 Oct;135:1000-1006. doi: 10.1016/j.marpolbul.2018.08.020. Epub 2018 Aug 20.

Marine benthic communities affected by the Doce River (southwestern Atlantic): Baseline before a mining disaster.

Author information

1
Laboratório de Invertebrados Marinhos do Ceará, Departamento de Biologia, Universidade Federal do Ceará (UFC), Campus do Pici, 60.455-760 Fortaleza, Ceará, Brazil; Instituto de Ciências do Mar (LABOMAR), Universidade Federal do Ceará (UFC), Av. Abolição 3207, Meireles, 60.165-081 Fortaleza, Ceará, Brazil.
2
Instituto de Ciências do Mar (LABOMAR), Universidade Federal do Ceará (UFC), Av. Abolição 3207, Meireles, 60.165-081 Fortaleza, Ceará, Brazil.
3
Laboratório de Invertebrados Marinhos do Ceará, Departamento de Biologia, Universidade Federal do Ceará (UFC), Campus do Pici, 60.455-760 Fortaleza, Ceará, Brazil.
4
Instituto de Ciências do Mar (LABOMAR), Universidade Federal do Ceará (UFC), Av. Abolição 3207, Meireles, 60.165-081 Fortaleza, Ceará, Brazil; Institut de Ciència i Tecnologia Ambientals (ICTA), Universitat Autònoma de Barcelona (UAB), Edifici Z, 081093 Barcelona, Spain. Electronic address: marcelosoares@ufc.br.

Abstract

Prior to Brazil's worst environmental disaster, caused by a mining dam collapse, we had carried out a study of the marine benthic macrofauna (11-51 m depth) under the influence of the Doce River. Our results showed significant diversity, in which mollusks, polychaetes, and crustaceans had the highest frequency, density, and abundance, represented by 162 families in summer and 173 in winter. Our results suggested that richness, abundance, and diversity increase with distance from the coast. Furthermore, with increasing distance from the coast and river mouth, in addition to increasing depth, there was a differentiation in composition and abundance. Multivariate analyses showed depth, carbonate, and organic matter as important factors that explain variations in composition and diversity across the continental shelf. The results could provide an invaluable baseline for measuring the effects on shallow and mesophotic communities of one of the largest tailings dam failures worldwide.

KEYWORDS:

Baseline assessment; Benthic ecology; Brazil; Macrofauna; Southwestern Atlantic; Tailings dam

PMID:
30300993
DOI:
10.1016/j.marpolbul.2018.08.020
[Indexed for MEDLINE]

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