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Spatial and temporal patterns of endocrine active chemicals in small streams indicate differential exposure to aquatic organisms

Journal of the American Water Resources Association

By:
, ,
DOI: 10.1111/jawr.12162

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Abstract

Alkylphenolic chemicals (APCs) and hormones were measured six times from February through October 2007 in three Minnesota streams receiving wastewater to identify spatial and temporal patterns in concentrations and in estrogen equivalency. Fish were collected once during the study to evaluate endpoints indicative of endocrine disruption. The most commonly detected APCs were 4-tert-octylphenol and 4-nonylphenol and the most commonly detected hormones were estrone and androstenedione. Chemical concentrations were greatest for nonylphenol ethoxycarboxylates (NPECs) (5,000-140,000 ng/l), followed by 4-nonlylphenol and 4-nonylphenolethoxylates (50-880 ng/l), 4-tert-octylphenol and 4-tert-octylphenolethoxylates with concentrations as great as 130 ng/l, and hormones (0.1-54 ng/l). Patterns in chemicals and estrogen equivalency indicated that wastewater effluent is a pathway of APCs and hormones to downstream locations in this study. However, upstream contributions can be equally or more important indicating alternative sources. This study indicates that aquatic organisms experience both spatially and temporally variable exposures in the number of compounds, total concentrations, and estrogenicity. This variability was evident in fish collected from the three rivers as no clear upstream to downstream pattern of endocrine disruption endpoints emerged.

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Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Spatial and temporal patterns of endocrine active chemicals in small streams indicate differential exposure to aquatic organisms
Series title:
Journal of the American Water Resources Association
DOI:
10.1111/jawr.12162
Volume
50
Issue:
2
Year Published:
2014
Language:
English
Publisher:
Wiley
Contributing office(s):
Minnesota Water Science Center
Description:
19 p.
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
First page:
401
Last page:
419
Country:
United States
State:
Minnesota