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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 (4–7 d) emphasising that the exposure period of 48–96 h 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 7 d LC50 values for copper and cadmium of 20 μg L−1 and 237 μg L−1 respectively. Sensitivities to copper were similar for both O. curvata (LC50 = 64 μg L−1) and S. longipes (LC50 = 56 μg L−1), while O. curvata was more sensitive to cadmium (LC50 = 901 μg L−1) than S. longipes (LC50 = 1250 μg L−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 |
| UTAS Author: | Marcus Zamora, L (Ms Lara Marcus) |
| UTAS Author: | Payne, SJ (Miss Sarah Payne) |
| UTAS Author: | Virtue, P (Associate Professor Patti Virtue) |
| ID Code: | 99202 |
| Year Published: | 2015 |
| Web of Science® Times Cited: | 14 |
| Deposited By: | IMAS Research and Education Centre |
| Deposited On: | 2015-03-17 |
| Last Modified: | 2017-11-02 |
| Downloads: | 0 |
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