Citation

Andrades R, Guabiroba HC, Hora MSC, Martins RF, Rodrigues VLA, Vilar CC, Giarrizzo T, Joyeux JC. Mar. Pollut. Bull. 2020; 154: e111073.

Affiliation

Laboratório de Ictiologia, Departamento de Oceanografia, Universidade Federal do Espírito Santo, Vitória, ES 29075-910, Brazil.

Copyright

(Copyright © 2020, Elsevier Publishing)

DOI

10.1016/j.marpolbul.2020.111073

PMID

32319904

Abstract

The Fundão dam collapse occurred on November 2015 in Mariana city (Brazil), provoking a series of ecological impacts over the Doce river basin and its nearshore environment. However many impacts over fishery target fauna (fish and shrimp) are still unknown or underestimated due to the lack of baseline data in the region. In the present study we assessed the isotopic niches modeled from δ¹³C and δ¹⁵N signatures of six estuarine fish species before and after the impact to assign potential shifts at the population- and community-level. We showed isotopic niche has altered in all studied species irrespective of its trophic group and habitat use. Niche community metrics indicated a depletion of trophic diversity and basal resources of the whole community after the impact. Food web changes as we reported here can impair the energy transfer through the food chain and put at risk the sustainability of small fisheries that rely upon local resources.

Copyright © 2020 Elsevier Ltd. All rights reserved.

Language: en

Keywords

Estuary; Mine spill; River pollution; Stable isotopes