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Mercury and other element exposure in tree swallows nesting at low pH and neutral pH lakes in northern Wisconsin USA

Environmental Pollution

By:
, , , , , ,
DOI: 10.1016/j.envpol.2011.12.017

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Abstract

The primary objective of this study was to determine whether tree swallows (Tachycineta bicolor) demonstrate similar responses to lake pH and mercury (Hg) contamination in northern Wisconsin as do common loons (Gavia immer). Similar to common loons, Hg concentrations in the blood of tree swallow nestlings were higher, Hg concentrations in eggs tended to be higher, and egg size tended to be smaller at low (<6.2) pH lakes. In contrast to common loons, tree swallow nestling production was not lower at low pH lakes. Based on modeling associations, Hg concentrations in tree swallow eggs and nestling blood can be used to predict Hg concentrations in common loons without the invasive or destructive sampling of loons. Mean concentrations of cadmium, manganese, and mercury in nestling livers were higher at low pH lakes than neutral pH lakes. Concentrations of cadmium, chromium, mercury, selenium, and zinc were not at toxic levels.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Mercury and other element exposure in tree swallows nesting at low pH and neutral pH lakes in northern Wisconsin USA
Series title:
Environmental Pollution
DOI:
10.1016/j.envpol.2011.12.017
Volume
163
Year Published:
2012
Language:
English
Publisher:
Elsevier
Publisher location:
Amsterdam, Netherlands
Contributing office(s):
Upper Midwest Environmental Sciences Center
Description:
9 p.
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
First page:
68
Last page:
76
Country:
United States
State:
Wisconsin