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首页> 外文期刊>Environmental toxicology and chemistry >TRACE METALS, STABLE ISOTOPE RATIOS, AND TROPHIC RELATIONS IN SEABIRDS FROM THE NORTH PACIFIC OCEAN
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TRACE METALS, STABLE ISOTOPE RATIOS, AND TROPHIC RELATIONS IN SEABIRDS FROM THE NORTH PACIFIC OCEAN

机译：北太平洋海域中的痕量金属，稳定的同位素比和营养关系

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摘要

Trace elements including mercury, cadmium, selenium, and stable nitrogen isotope ratios (δ~(15)N) were measured in tissues of Pacific seabirds. Two species of albatross (Diomedea immutabilis, Diomedea nigripes), four species of shearwaters (Puffinus bulleri, Puffinus carneipes, Puffinus griseus, Puffinus tenuirostris), northern fulmar (Fulmarus glacialis), and horned puffin (Fra-tercula corniculata) were collected opportunistically by an experimental fishery in the North Pacific Ocean. Two species each of petrels (Oceanodroma leucorhoa, Oceanodroma furcata) and auklets (Ptychoramphus aleuticus, Cerorhinca monocerata) were collected at breeding colonies on the north coast of British Columbia, Canada. Concentrations of toxic trace metals varied considerably among the pelagic nonbreeders; highest concentrations consistently were in D. nigripes (e.g., Hg), 70-fold greater than F. corniculata (e.g., Cd), eightfold greater than P. tenuirostris (e.g., Se), and fourfold greater than F. corniculata. Most essential trace elements varied little among species, consistent with physiological regulation. Values for δ~(15)N correlated positively with hepatic Se (r = 0.771, p = 0.025) and negatively with Co (r = 0.817, p = 0.013). Among the four breeding species, there were significant positive associations for δ~(15)N in muscle and hepatic Se (r = 0.822, p = 0.002), Hg (r = 0.744, p = 0.0001), and Cd (r = 0.589, p = 0.003). Differences in time scales integrated by δ~(15)N versus trace metals in tissues probably reduced the apparent associations between trace-metal exposure and diet.
机译：测量了太平洋海鸟组织中的痕量元素，包括汞，镉，硒和稳定的氮同位素比（δ〜（15）N）。分别收集了两种信天翁（Diomedea immutabilis，Diomedea nigripes），四种剪枝水（Puffinus bulleri，Puffinus carneipes，Puffinus griseus，Puffinus tenuirostris），北部海mar（Fulmarus glacialis）和有角的海角（Fra-atacula）。北太平洋的实验性渔业。在加拿大不列颠哥伦比亚省北海岸的繁殖地上，分别收集了两个物种：海燕（白斑大洋洲（Oceanodroma leucorhoa），糠Ocean（Oceanoodroma furcata））和a（Ptychoramphus aleuticus，Cerorhinca monocerata）。中上层非育种者中有毒微量金属的浓度差异很大。最高浓度始终在黑眉草中（例如Hg），比山茱F F.corniculata（例如Cd）高70倍，比tenuirostris（例如Se）高8倍，比山茱。F.corniculata高四倍。大多数必需的微量元素在物种之间变化很小，与生理调节一致。 δ〜（15）N的值与肝Se呈正相关（r = 0.771，p = 0.025），与Co呈负相关（r = 0.817，p = 0.013）。在这四个繁殖物种中，肌肉和肝中的δ〜（15）N与硒（r = 0.822，p = 0.002），Hg（r = 0.744，p = 0.0001）和Cd（r = 0.589）呈显着正相关。 ，p ＝ 0.003）。 δ〜（15）N与组织中痕量金属的累积时间尺度差异可能会减少痕量金属暴露与饮食之间的明显联系。

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