Trophic calculations reveal the mechanism of population-level variation in mercury concentrations between marine ecosystems: case studies of two polar seabirds.
Trophic calculations reveal the mechanism of population-level variation in mercury concentrations between marine ecosystems: case studies of two polar seabirds.
复制标题
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。
DOI：
10.1016/j.marpolbul.2013.08.003
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发表时间：
2013
影响因子：
5.8
通讯作者：
M. Polito
中科院分区：
文献类型：
--
作者：
R. Brasso;M. Polito
将定量营养水平分析纳入生态毒理学研究提供了解释能力，以确定在大地理尺度上驱动汞暴露人群水平变化的营养或环境因素。在南极海洋生态系统中，比较了南极半岛和罗斯海Adélie企鹅(Pygocelis Adeliae)的汞含量和稳定同位素值。将组织δ15N值修正为基线δ15N值揭示了种群水平营养位置的差异，这也是汞含量差异的原因。厚嘴鼠(Uria Lomvia)的数据是根据巴芬湾和斯瓦尔巴群岛公布的值合成的，以证明基线δ15N值在识别不同饮食条件下环境汞暴露的差异方面的效用。在这里，我们论证了计算种群特定营养水平数据的重要性，以揭示地理上不同的海洋捕食者种群之间汞浓度差异的来源。
The incorporation of quantitative trophic level analysis in ecotoxicological studies provides explanatory power to identify the factors, trophic or environmental, driving population-level variation in mercury exposure at large geographic scales. In the Antarctic marine ecosystem, mercury concentrations and stable isotope values in Adélie penguins (Pygoscelis adeliae) were compared between the Antarctic Peninsula and the Ross Sea. Correcting tissue δ15N values for baseline δ15N values revealed population-level differences in trophic position which contributes to differences in mercury. Data from Thick-billed murres (Uria lomvia) were synthesized from published values from Baffin Bay and Svalbard to demonstrate the utility of baseline δ15N values in identifying differences in environmental mercury exposure independent of diet. Here, we demonstrate the importance of calculating population-specific trophic level data to uncover the source of variation in mercury concentrations between geographically distinct populations of marine predators.