Show simple item record

dc.contributor.authorMcpartland, Molly
dc.contributor.authorGarbus, Svend-Erik
dc.contributor.authorLierhagen, Syverin
dc.contributor.authorSonne, Christian
dc.contributor.authorKrøkje, Åse
dc.identifier.citationEnvironment International. 2020, 142 1-9.en_US
dc.description.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 <500 μg/kg ww. The most highly contaminated individuals in the present study had Pb-IRs similar to those of Pb ammunition indicating shot pellet uptake. This study further emphasizes the need for continued biomonitoring of the Christiansø colony, including fecal sampling and environmental field sampling to identify the origin and extent of dietary Pb exposure on Christiansø. As a representative unit of the Baltic Flyway population; the Christiansø colony provides an important opportunity for continued investigation into Pb contamination, population dynamics, and declines.en_US
dc.rightsNavngivelse 4.0 Internasjonal*
dc.titleLead isotopic signatures in blood from incubating common eiders (Somateria mollissima) in the central Baltic Seaen_US
dc.title.alternativeLead isotopic signatures in blood from incubating common eiders (Somateria mollissima) in the central Baltic Seaen_US
dc.typePeer revieweden_US
dc.typeJournal articleen_US
dc.source.journalEnvironment Internationalen_US

Files in this item


This item appears in the following Collection(s)

Show simple item record

Navngivelse 4.0 Internasjonal
Except where otherwise noted, this item's license is described as Navngivelse 4.0 Internasjonal