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沿海食增加了繁殖海鸟中的度:来自同位素,生物和猎物的见解

Christina Petalas¹, Rose M Lacombe², Kyle H Elliott¹

¹Department of Natural Resource Sciences, McGill University, Montreal, Québec H3A 0G4, Canada.

The Science of the total environment

|January 31, 2025

概括

像剃须 (Alca torda) 这样的海鸟在靠近岸边食时显示出更高的含量. 食策略的这种转变可能会增加他们从沿海食物网中接触到的风险.

科学领域:

生态毒理学生态毒理学
海洋生态海洋生态学
鸟类生物学鸟类生物学

背景情况:

污染是一个重要的环境问题,特别是在海洋生态系统.
作为移动的捕食者,海鸟可以在各种空间和时间尺度上整合暴露.
食策略直接影响海洋捕食者的负担.

研究的目的:

为了研究寻策略与繁殖剃须 (Alca torda) 中的度之间的关系.
了解食的空间和时间变化如何影响海鸟的水平.
评估沿海环境中与食相关的污染相关的生态毒理风险.

主要方法:

利用GPS跟踪来监测海鸟的移动和食模式.
采用稳定同位素分析 (δ15N, δ13C, δ34S) 来确定热带生态和息地使用.
使用基于巢的摄像头观察猎物交付和识别猎物物种.

主要成果:

剃须刀中的总含量在不同年份之间有显著的变化,所有个体都超过了低风险毒性值.
在度较高的年份,剃须靠近海岸食,表现出较低的δ13C和δ34S值.
尽管猎物物种组成一致,但在高年的人类消耗较小的猎物物品,并在每次食旅行中交付更多物品.

结论:

剃须刀中的度升高与沿海沿海食的转变有关.
沿海食可能会使海鸟因累积的淡水/陆地输入而暴露于更高的水平.
食策略在驱动沿海生态系统内的海鸟中污染方面发挥着关键作用.

关键词:

沿海沿海沿海沿海沿海 Hg Hg Hg Hg Hg 的意思是什么意思运动生态学运动生态学污染物的污染物海鸟是一种海鸟.圣劳伦斯 - - 这是圣劳伦斯.

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