Changes in polychlorinated biphenyl (PCB) exposure in tree swallows (Tachycineta bicolor) nesting along the Sheboygan River, WI, USA

Ecotoxicology
By: , and 

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Abstract

Exposure to polychlorinated biphenyls (PCBs) in tree swallow (Tachycineta bicolor) eggs on the Sheboygan River, Wisconsin in the 1990s was higher at sites downstream (geometric means = 3.33–8.69 μg/g wet wt.) of the putative PCB source in Sheboygan Falls, Wisconsin than it was above the source (1.24 μg/g) with the exposure declining as the distance downstream of the source increased. A similar pattern of declining exposure was present in the 2010s as well. Although exposure to PCBs in eggs along the Sheboygan River at sites downstream of Sheboygan Falls has declined by ~60 % since the mid-1990s (8.69 down to 3.27 μg/g) there still seems to be residual pockets of contamination that are exposing some individuals (~25 %) to PCB contamination, similar to exposure found in the 1990s. The exposure patterns in eggs and nestlings among sites, and the changes between the two decades, are further validated by accumulation rate information.

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Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Changes in polychlorinated biphenyl (PCB) exposure in tree swallows (Tachycineta bicolor) nesting along the Sheboygan River, WI, USA
Series title Ecotoxicology
DOI 10.1007/s10646-014-1286-7
Volume 23
Issue 8
Year Published 2014
Language English
Publisher Springer
Contributing office(s) Contaminant Biology Program, Upper Midwest Environmental Sciences Center, National Wildlife Health Center
Description 8 p.
First page 1439
Last page 1446
Country United States
State Wisconsin
Other Geospatial Sheboygan River
Online Only (Y/N) N
Additional Online Files (Y/N) N