期刊
ENVIRONMENTAL POLLUTION
卷 166, 期 -, 页码 226-232出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.envpol.2012.03.004
关键词
Mercury; Carbon; Nitrogen; Seabird egg; Trophic level
资金
- North Pacific Research Board (NPRB) [0534-321]
- NIST
- AMNWR
Mercury concentration ([Hg]), delta N-15, and delta C-13 values were measured in eggs from common murres (Uria aalge), thick-billed murres (U. lomvia), glaucous gulls (Larus hyperboreus), and glaucous-winged gulls (L glaucescens) collected in Alaska from 1999 to 2005. [Hg] was normalized to a common trophic level using egg delta N-15 values and published Hg trophic magnification factors. Egg [Hg] was higher in murres from Gulf of Alaska, Cook Inlet, and Norton Sound regions compared to Bering Sea and Bering Strait regions, independent of trophic level. We believe the Yukon River outflow and terrestrial Hg sources on the southern Seward Peninsula are responsible for the elevated [Hg] in Norton Sound eggs. Normalizing for trophic level generally diminished or eliminated differences in [Hg] among taxa, but temporal variability was unrelated to trophic level. Normalizing murre egg [Hg] by trophic level improves the confidence in regional comparisons of Hg sources and biogeochemical cycling in Alaska. Published by Elsevier Ltd.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据