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Sensitivity and response time of three common Antarctic marine copepods to metal exposure

Citation

Marcus Zamora, L and King, CK and Payne, SJ and Virtue, P, Sensitivity and response time of three common Antarctic marine copepods to metal exposure, Chemosphere, 120 pp. 267-272. ISSN 0045-6535 (2015) [Refereed Article]

Copyright Statement

Copyright 2015 Elsevier

DOI: doi:10.1016/j.chemosphere.2014.07.051

Abstract

Understanding the sensitivity of Antarctic marine organisms to metals is essential in order to manage environmental contamination risks. To date toxicity studies conducted on Antarctic marine species are limited. This study is the first to examine the acute effects of copper and cadmium on three common coastal Antarctic copepods: the calanoids Paralabidocera antarctica and Stephos longipes, and the cyclopoid Oncaea curvata. These copepods responded slowly to metal exposure (47d) emphasising that the exposure period of 4896h commonly used in toxicity tests with temperate and tropical species is not appropriate for polar organisms. We found that a longer 7 d exposure period was the minimum duration appropriate for Antarctic copepods. Although sensitivity to metal exposure varied between species, copper was more toxic than cadmium in all three species. P. antarctica was the most sensitive with 7d LC50 values for copper and cadmium of 20μgL−1 and 237μgL−1 respectively. Sensitivities to copper were similar for both O. curvata (LC50=64μgL−1) and S. longipes (LC50=56μgL−1), while O. curvata was more sensitive to cadmium (LC50=901μgL−1) than S. longipes (LC50=1250μgL−1). In comparison to copepods from lower latitudes, Antarctic copepods were more sensitive to copper and of similar sensitivity or less sensitive to cadmium. This study highlights the need for longer exposure periods in toxicity tests with slow responding Antarctic biota in order to generate relevant sensitivity data for inclusion in site-specific environmental quality guidelines for Antarctica.

Item Details

Item Type:Refereed Article
Keywords:Antarctica, zooplankton, contamination, toxicity, cadmium, copper
Research Division:Biological Sciences
Research Group:Ecology
Research Field:Marine and Estuarine Ecology (incl. Marine Ichthyology)
Objective Division:Environment
Objective Group:Flora, Fauna and Biodiversity
Objective Field:Antarctic and Sub-Antarctic Flora, Fauna and Biodiversity
Author:Marcus Zamora, L (Ms Lara Marcus)
Author:Payne, SJ (Miss Sarah Payne)
Author:Virtue, P (Associate Professor Patti Virtue)
ID Code:99202
Year Published:2015
Web of Science® Times Cited:10
Deposited By:IMAS Research and Education Centre
Deposited On:2015-03-17
Last Modified:2017-11-02
Downloads:0

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