Use, development and improvements in the protocol of whole-sediment toxicity identification evaluation using benthic copepods

•When global exposure routes are considered, TIE results may be not very clear.•Water exposure alone allowed a clearer identification of chemicals related to toxicity.•Assessing different exposure routes by sediment TIE may better address the causes of toxicity. The whole-sediment Toxicity Identific...

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Bibliographic Details
Published in:Marine pollution bulletin 2015-02, Vol.91 (2), p.511-517
Main Authors: Camargo, Júlia B.D.A., Cruz, Ana C.F., Campos, Bruno G., Araújo, Giuliana S., Fonseca, Tainá G., Abessa, Denis M.S.
Format: Article
Language:English
Subjects:
Ammonia - analysis
Ammonia - toxicity
Animals
Copepoda
Copepoda - drug effects
Ecotoxicology - methods
Environmental Exposure - adverse effects
Geologic Sediments
Marine
Metals - analysis
Metals - toxicity
Nitocra sp
Organic Chemicals - toxicity
Sediment–water interface
TIE
Toxicity Tests - methods
Water Pollutants, Chemical - analysis
Water Pollutants, Chemical - toxicity
Whole-sediment
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Summary:•When global exposure routes are considered, TIE results may be not very clear.•Water exposure alone allowed a clearer identification of chemicals related to toxicity.•Assessing different exposure routes by sediment TIE may better address the causes of toxicity. The whole-sediment Toxicity Identification Evaluation (TIE) approach is a useful technique that allows for the identification of the contaminants responsible for the toxicity of complex sediment samples. This study aimed to compare the effectiveness of this technique in identifying the causes of toxicity when the test organism used in the toxicity test is capable of ingesting sediment particles. Two forms of exposure were compared: whole-sediment (WS), which integrates dermic and dietary exposures; and sediment–water interface (SWI), which involves dermic exposure only. The combined analysis of the TIE experiments revealed that metals, ammonia and, at one station, organic compounds, were responsible for sediment toxicity. The integrated use of WS and SWI TIE manipulations provided a more complete overview of the causes of toxicity, and thus enabled a better comprehension of complex contamination situations and, consequently, a better ecological assessment.
ISSN:0025-326X
1879-3363
DOI:10.1016/j.marpolbul.2014.10.015