Influence of Species‐Specific Feeding Ecology on Mercury Concentrations in Seabirds Breeding on the Chatham Islands, New Zealand
Influence of Species‐Specific Feeding Ecology on Mercury Concentrations in Seabirds Breeding on the Chatham Islands, New Zealand
复制标题
物种特定摄食生态对新西兰查塔姆群岛海鸟繁殖中汞浓度的影响
DOI：
10.1002/etc.4933
复制
发表时间：
2021
影响因子：
4.1
通讯作者：
Quillfeldt P
中科院分区：
文献类型：
--
作者：
Thébault J;Bustamante P;Massaro M;Taylor G ;Quillfeldt P
汞（Hg）是一种有毒金属，可在生物体内积累，并沿食物网沿着产生生物放大作用;因此，由于汞的生物积累量很大，海鸟等长寿捕食者面临风险。海鸟被广泛用于监测海洋生态系统的污染情况。在本研究中，我们调查了汞浓度的血液，肌肉和羽毛的7 procellariform海鸟繁殖的查塔姆群岛，新西兰。使用碳和氮的整体和化合物特异性稳定同位素比率作为营养位置和分布的代表，我们还测试了汞污染是否与特定物种的摄食生态有关。汞暴露在海鸟群落中差异很大。污染最严重的物种是洋红海燕，其血液中的汞含量是宽嘴海燕的29倍，羽毛中的汞含量是灰背海燕的35倍。血液和羽毛中的汞浓度的变化显着和正相关的饲养栖息地和营养位置，突出了发生有效的汞生物放大过程沿着食物网。物种和觅食生境是海鸟群落中汞暴露的两个主要驱动因素。翼手龙属的血液和羽毛汞浓度较高，这可能是由其特定的生理和/或由于其在杂交期间的觅食行为（即，从塔斯曼海到洪堡洋流系统）。这两种濒危物种面临汞污染的有害影响，需要进一步研究以调查潜在的负面影响，特别是对它们繁殖能力的影响。© 2020作者。环境毒理学和化学由Wiley Periodicals LLC代表SETAC出版。
Mercury (Hg) is a toxic metal that accumulates in organisms and biomagnifies along food webs; hence, long‐lived predators such as seabirds are at risk as a result of high Hg bioaccumulation. Seabirds have been widely used to monitor the contamination of marine ecosystems. In the present study, we investigated Hg concentrations in blood, muscle, and feathers of 7 procellariform seabirds breeding on the Chatham Islands, New Zealand. Using bulk and compound‐specific stable isotope ratios of carbon and nitrogen as a proxy of trophic position and distribution, we also tested whether Hg contamination is related to the species‐specific feeding ecology. Mercury exposure varied widely within the seabird community. The highest contaminated species, the Magenta petrel, had approximately 29 times more Hg in its blood than the broad‐billed prion, and approximately 35 times more Hg in its feathers than the grey‐backed storm petrel. Variations of Hg concentrations in blood and feathers were significantly and positively linked to feeding habitats and trophic position, highlighting the occurrence of efficient Hg biomagnification processes along the food web. Species and feeding habitats were the 2 main drivers of Hg exposure within the seabird community. ThePterodromaspecies had high blood and feather Hg concentrations, which can be caused by their specific physiology and/or because of their foraging behavior during the interbreeding period (i.e., from the Tasman Sea to the Humboldt Current system). These 2 threatened species are at risk of suffering detrimental effects from Hg contamination and further studies are required to investigate potential negative impacts, especially on their reproduction capability.Environ Toxicol Chem2021;40:454–472. © 2020 The Authors.Environmental Toxicology and Chemistrypublished by Wiley Periodicals LLC on behalf of SETAC.
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影响因子：
3
作者：
D. Rabenstein
通讯作者：
D. Rabenstein
影响因子：
2.5
作者：
Chouvelon, T.;Spitz, J.;Bustamante, P.
通讯作者：
Bustamante, P.
同位素新闻
DOI：
--
发表时间：
2015
期刊：
影响因子：
--
作者：
二瓶直登;田野井慶太朗;中西友子;二瓶直登;二瓶直登;二瓶直登;二瓶直登
通讯作者：
二瓶直登
营养计算揭示了海洋生态系统之间汞浓度的种群水平变化机制：两种极地海鸟的案例研究。
影响因子：
5.8
作者：
R. Brasso;M. Polito
通讯作者：
M. Polito
影响因子：
2.7
作者：
B. G. Weissberg;M. Zobel
通讯作者：
M. Zobel