Retrospective analysis of estrogenic endocrine disruption and land-use influences in the Chesapeake Bay watershed.

Autor: Blazer VS; U.S. Geological Survey, National Fish Health Research Laboratory, Leetown Science Center, Kearneysville, WV, 25430, USA. Electronic address: vblazer@usgs.gov., Gordon S; U.S. Geological Survey, National Fish Health Research Laboratory, Leetown Science Center, Kearneysville, WV, 25430, USA. Electronic address: sgordon@usgs.gov., Jones DK; U.S. Geological Survey, Utah Water Science Center, West Valley City, UT, 84119, USA. Electronic address: dkjones@usgs.gov., Iwanowicz LR; U.S. Geological Survey, National Fish Health Research Laboratory, Leetown Science Center, Kearneysville, WV, 25430, USA. Electronic address: liwanowicz@usgs.gov., Walsh HL; U.S. Geological Survey, National Fish Health Research Laboratory, Leetown Science Center, Kearneysville, WV, 25430, USA. Electronic address: hwalsh@usgs.gov., Sperry AJ; U.S. Geological Survey, National Fish Health Research Laboratory, Leetown Science Center, Kearneysville, WV, 25430, USA. Electronic address: asperry@usgs.gov., Smalling KL; U.S. Geological Survey, New Jersey Water Science Center, Lawrenceville, NJ, 08648, USA. Electronic address: ksmall@usgs.gov.
Jazyk: angličtina
Zdroj: Chemosphere [Chemosphere] 2021 Mar; Vol. 266, pp. 129009. Date of Electronic Publication: 2020 Nov 19.
DOI: 10.1016/j.chemosphere.2020.129009
Abstrakt: The Chesapeake Bay is the largest estuary in the United States and its watershed includes river drainages in six states and the District of Columbia. Sportfishing is of major economic interest, however, the rivers within the watershed provide numerous other ecological, recreational, cultural and economic benefits, as well as serving as a drinking water source for millions of people. Consequently, major fish kills and the subsequent finding of estrogenic endocrine disruption (intersex or testicular oocytes and plasma vitellogenin in male fishes) raised public and management concerns. Studies have occurred at various sites within the Bay watershed to document the extent and severity of endocrine disruption, identify risk factors and document temporal and spatial variability. Data from these focal studies, which began in 2004, were used in CART (classification and regression trees) analyses to better identify land use associations and potential management practices that influence estrogenic endocrine disruption. These analyses emphasized the importance of scale (immediate versus upstream catchment) and the complex mixtures of stressors which can contribute to surface water estrogenicity and the associated adverse effects of exposure. Both agricultural (percent cultivated, pesticide application, phytoestrogen cover crops) and developed (population density, road density, impervious surface) land cover showed positive relationships to estrogenic indicators, while percent forest and shrubs generally had a negative association. The findings can serve as a baseline for assessing ongoing restoration and management practices.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Published by Elsevier Ltd.)
Databáze: MEDLINE
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