Using an integrated approach to assess the sediment quality of an estuary from the semi-arid coast of Brazil

MARINE POLLUTION BULLETIN

卷:104

Article

Souza, Ivanildo Surini^1,2  Araujo, Giuliana Seraphim³  Feitosa Cruz, Ana Carolina³  Fonseca, Taina Garcia^3,4  Duarte Alves Camargo, Julia Beatriz³  Medeiros, Guilherme Fulgencio⁵  Abessa, Denis M. S.^1,3 

[1] Ceara Fed Univ UFG, Inst Marine Sci, Av Abolicao 3207, BR-60165081 Fortaleza, Ceara, Brazil

[2] Rio Grande Norte Fed Inst Sci & Technol Educ IFRN, Av Senador Salgado Filho 1559, BR-59015000 Natal, RN, Brazil

[3] Sao Paulo State Univ UNESP, Praca Infante Dom Henrique S-N, BR-11330900 Sao Vicente, SP, Brazil

[4] Univ Algarve, Ctr Marine & Environm Res CIMA, Fac Sci & Technol FCT, Campus Gambelas, P-8005139 Faro, Portugal

[5] Fed Univ Rio Grande Norte UFRN, Campus Univ Lagoa Nova 1524, BR-59078970 Natal, RN, Brazil

关键词: Geochemistry;    Contamination;    Toxicity;    Semi-arid coast;    Sediments;   

DOI  :  10.1016/j.marpolbul.2016.02.009

来源: Elsevier

【 摘 要 】

The Jundiai-Potengi Estuary (JPE) on the semi-arid coast of Brazil is influenced by multiple sources of pollution. Sediment quality at 10 JPE sites was evaluated through an integrated approach. Rainy and dry seasons were considered. Collected sediments were analyzed for texture, metal, nitrogen, phosphorus concentrations, and toxicity to invertebrates. Geochemical and ecotoxicological data were integrated using qualitative approaches and multivariate techniques. We observed decreased sediment quality in both seasons, particularly in the mid estuary. In the dry season, the contamination-toxicity relationship was clearer, as hydrological conditions favor contaminant retention within the estuary. Rainy season conditions were found to be worse, since stormwater drainage from agricultural and urban areas carries the contamination into the estuary. Because of the contamination sources and dissolved and particle-bound metal transport, contamination and toxicity did not correlate as clearly in the rainy season. The results suggest that unmeasured contaminants are contributing to JPE sediment degradation. (C) 2016 Elsevier Ltd. All rights reserved.

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