Spatiotemporal Trends of Heavy Metals in Indo-Pacific Humpback Dolphins (Sousa chinensis) from the Western Pearl River Estuary, China
Spatiotemporal Trends of Heavy Metals in Indo-Pacific Humpback Dolphins (Sousa chinensis) from the Western Pearl River Estuary, China
复制标题
珠江口西部印太座头海豚(Sousa chinensis)重金属时空变化趋势
DOI：
10.1021/acs.est.6b05566
复制
发表时间：
2017-02-07
影响因子：
11.4
通讯作者：
Wu, Yuping
中科院分区：
文献类型：
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作者：
Gui, Duan;Yu, Ri-Qing;Wu, Yuping
研究了2004-2015年珠江口西部中华白海豚肝脏和肾脏中11种重金属含量的时空变化趋势。这些海豚的肝脏中铬、砷和铜的含量是全球鲸类动物中最高的，锌、铜和汞的含量也很高，足以对某些动物造成毒理学影响。在同性别年龄组间，伶仃洋海豚的Hg、Se、V污染水平显著高于西四区，Cd污染水平则相反。广义加法混合模型表明，大多数金属有显着的，但不同的时间趋势超过10年。Cu和Zn的浓度近年来显著增加，与该地区这些金属的高输入相对应。体长调整镉水平在2012年达到峰值，伴随着海豚搁浅事件的最高年度数量。相对于香港沃茨（珠江三角洲东部水域）海豚体内重金属含量的显著下降，珠江三角洲西部水域的重金属暴露量升高引起了严重关注。
We assessed the spatiotemporal trends of the concentrations of 11 heavy metals (HMs) in the liver and kidney of Indo-Pacific humpback dolphins (Sousa chinensis) from western Pearl River Estuary (PRE) during 2004-2015. The hepatic levels of Cr, As, and Cu in these dolphins were among the highest reported for cetaceans globally, and the levels of Zn, Cu, and Hg were sufficiently high to cause toxicological effects in some of the animals. Between same age-sex groups, dolphins from Lingdingyang were significantly more contaminated with Hg, Se, and V than those from the West-four region, while the opposite was true for Cd. Generalized additive mixed models showed that most metals had significant but dissimilar temporal trends over a 10-year period. The concentrations of Cu and Zn increased significantly in recent years, corresponding to the high input of these metals in the region. Body-length adjusted Cd levels peaked in 2012, accompanied by the highest annual number of dolphin stranding events. In contrast to the significant decrease in HM levels in the dolphins in Hong Kong waters (the eastern reaches of the PRE), the elevated metal exposure in the western PRE raises serious concerns.