期刊
ENVIRONMENTAL SCIENCE & TECHNOLOGY
卷 50, 期 3, 页码 1595-1603出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.est.5b05626
关键词
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资金
- Brian Mason Trust
- Journal of Experimental Biology Travel Fellowship
- NSERC CRD
- International Zinc Association
- International Lead Zinc Research Organization
- Nickel Producers Environmental Research Association
- International Copper Association
- Copper Development Association
- Teck Resources
- Vale Inco
- Canada Research Chairs Program
- Campus Alberta Innovates Program Research Chair
A 96 h toxicity test showed that the embryos of the New Zealand sea urchin (Evechinus chloroticus) are the most sensitive of all studied marine species to waterborne nickel (Ni), with the EC50 for the development of fully formed pluteus larvae found to be 14 mu g L-1. Failure to develop a standard larval shape suggested skeletal impairment. Whole body ions (Na, Mg) increased with Ni exposure and calcium influx was depressed. The effects of natural organic matter (NOM) on Ni accumulation and toxicity were also examined in three different seawater sources (nearshore, offshore, and near the outlet of a brown water stream). At low dissolved organic carbon (DOC) concentrations the brown water NOM was protective against Ni toxicity, however at higher DOC concentrations it exacerbated developmental toxicity in the presence of Ni. These results show that sea urchin development is highly sensitive to Ni via a mechanism that involves ionoregulatory disturbance, and that Ni toxicity is influenced by environmental factors such as NOM. These data will be critical for the development of water quality guidelines for Ni in the marine environment.
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