文章基本信息

标题：Lead isotopic signatures in blood from incubating common eiders ( Somateria mollissima) in the central Baltic Sea
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作者：Molly McPartland ; Svend-Erik Garbus ; Syverin Lierhagen 等
期刊名称：Environment International
印刷版ISSN：0160-4120
电子版ISSN：1873-6750
出版年度：2020
卷号：142
页码：1-9
DOI：10.1016/j.envint.2020.105874
语种：English
出版社：Pergamon
摘要：Highlights•Pb isotope ratio analysis was done to determine Pb sources polluting eiders in 2018.•Pb isotopic ratios suggest the highest exposure is due to ingestion of Pb pellets.•Pb isotopic ratios also indicate multiple sources of Pb pollution.•Additional Pb sampling in the Baltic Sea is needed to identify specific Pb sources.AbstractThe Christiansø colony of common eiders (Somateria mollissima)in the central Baltic Sea were exposed to high levels of Pb during the 2018 breeding season that were not present in 2017. Due to these high Pb blood levels, the present study investigated possible Pb sources and Pb dynamics within this vulnerable colony. We analyzed body mass and lead isotopic ratios (Pb-IRs) in blood taken from the same incubating eiders at the early (day 4) and late (day 24) stages of incubation during the 2018 breeding season (n = 23). Pb-IRs 208/207, 208/206, 206/207, and 207/206 were analyzed using high resolution inductively coupled mass spectrometry. We found largely similar Pb-IRs from the different stages of incubation indicating a predominantly constant endogenous source of Pb exposure. We suggest the increasing Pb levels come from pre-nesting and nesting foraging and from medullary bone release. The similar Pb-IRs also indicate continued metabolization of the medullary bone to meet the nutritional and energy demands of incubation. Comparisons to Pb-IR reports from the Baltic Sea showed multiple sources of pollution distinguished by a difference between Pb-IRs in individuals with Pb blood concentrations >500 μg/kg ww and
关键词：Avian;Baltic Sea;Lead poisoning;Isotope;HR-ICP-MS;Biomonitoring