Global S&T Development Trend Analysis Platform of Resources and Environment
High Levels of Contaminants in Killer Whales | |
admin | |
2021 | |
发布年 | 2021 |
语种 | 英语 |
国家 | 美国 |
领域 | 气候变化 |
正文(英文) | Little is known concerning environmental contaminants in predators at the top of a food chain. A study published in Environmental Toxicology and Chemistry has demonstrated that new types of brominated flame retardants accumulate in the tissues of killer whales near Norway and are also passed on to nursing offspring. Investigators also detected human-made chemicals called perfluoroalkyl substances (PFAS) in the tissues of adult killer whales. Thresholds for health effects of PFAS in marine mammals are not established, but the chemical has been linked to reproductive and endocrine effects in wildlife. In addition, polychlorinated biphenyls (PCBs), which have long been banned, were detected in the blubber of 7 of the 8 killer whales in the study at levels that exceeded the proposed threshold for toxicological effects in marine mammals. "Levels of pollutants in top predators give not only an indication of ecosystem health, but of the persistence of chemicals, passive mobility in the environment, and active biotransport with migrating animals," the authors wrote. "Our results are relevant for the continued environmental monitoring of contaminants in the Arctic." Journal Reference:
Cite This Page: Wiley. "High levels of contaminants in killer whales." ScienceDaily. ScienceDaily, 19 May 2021.
Wiley. (2021, May 19). High levels of contaminants in killer whales. ScienceDaily. Retrieved May 19, 2021 from www.sciencedaily.com/releases/2021/05/210519120706.htm
Wiley. "High levels of contaminants in killer whales." ScienceDaily. www.sciencedaily.com/releases/2021/05/210519120706.htm (accessed May 19, 2021).
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URL | 查看原文 |
来源平台 | Science Daily |
文献类型 | 新闻 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/326165 |
专题 | 气候变化 |
推荐引用方式 GB/T 7714 | admin. High Levels of Contaminants in Killer Whales. 2021. |
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