Three Decades of Change in Demersal Fish and Water Quality in a Long Island Sound Embayment

Three Decades of Change in Demersal Fish and Water Quality in a Long Island Sound Embayment Estuaries are impacted by multiple anthropogenic stressors from eutrophication to climate change. Long-term observational datasets allow the determination of trends in estuarine indicators and the prediction of future conditions. Here, a dataset of water quality and demersal fish community composition in a Long Island Sound embayment (Norwalk Harbor, Connecticut) from 1987 to 2016 was examined. Mean water column water temperature increased, dissolved oxygen decreased, and salinity increased over the study period, with simultaneous changes in the demersal fish community. Fish abundance declined overall, with declines in CPUE observed across multiple species including the commercially important winter flounder (Pseudopleuronectes americanus). As fish can serve as effective indicators of estuarine health, these changes suggest a negative shift in the health of this Long Island Sound embayment. Climate change presents an increasing threat to estuaries and the ecosystem services they provide, especially when coupled with other anthropogenic stressors. Management actions are needed at multiple spatial scales, from local to global, to combat these threats to estuarine health. . . . . Keywords Estuaries Demersal fish Climate change Winter flounder Long Island Sound Introduction ecosystem services provided by estuaries have been valued in the billions of dollars (Barbier et al. 2011;Kocian etal. 2015), http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Estuaries and Coasts Springer Journals

Three Decades of Change in Demersal Fish and Water Quality in a Long Island Sound Embayment

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Publisher
Springer US
Copyright
Copyright © 2018 by Coastal and Estuarine Research Federation
Subject
Environment; Environment, general; Ecology; Freshwater & Marine Ecology; Environmental Management; Coastal Sciences; Water and Health
ISSN
1559-2723
eISSN
1559-2731
D.O.I.
10.1007/s12237-018-0414-7
Publisher site
See Article on Publisher Site

Abstract

Estuaries are impacted by multiple anthropogenic stressors from eutrophication to climate change. Long-term observational datasets allow the determination of trends in estuarine indicators and the prediction of future conditions. Here, a dataset of water quality and demersal fish community composition in a Long Island Sound embayment (Norwalk Harbor, Connecticut) from 1987 to 2016 was examined. Mean water column water temperature increased, dissolved oxygen decreased, and salinity increased over the study period, with simultaneous changes in the demersal fish community. Fish abundance declined overall, with declines in CPUE observed across multiple species including the commercially important winter flounder (Pseudopleuronectes americanus). As fish can serve as effective indicators of estuarine health, these changes suggest a negative shift in the health of this Long Island Sound embayment. Climate change presents an increasing threat to estuaries and the ecosystem services they provide, especially when coupled with other anthropogenic stressors. Management actions are needed at multiple spatial scales, from local to global, to combat these threats to estuarine health. . . . . Keywords Estuaries Demersal fish Climate change Winter flounder Long Island Sound Introduction ecosystem services provided by estuaries have been valued in the billions of dollars (Barbier et al. 2011;Kocian etal. 2015),

Journal

Estuaries and CoastsSpringer Journals

Published: May 30, 2018

References

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