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Effects of Urban Development on Fish Population Dynamics in Kelsey Creek, Washington
Author(s) -
Scott J. B.,
Steward C. R.,
Stober Q. J.
Publication year - 1986
Publication title -
transactions of the american fisheries society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.696
H-Index - 86
eISSN - 1548-8659
pISSN - 0002-8487
DOI - 10.1577/1548-8659(1986)115<555:eoudof>2.0.co;2
Subject(s) - oncorhynchus , trout , salmo , biomass (ecology) , fishery , fish <actinopterygii> , rainbow trout , habitat , biology , population , nutrient , streams , ecology , geography , demography , sociology , computer network , computer science
A 30‐month study of the comparative dynamics of the fish populations inhabiting Kelsey Creek, located in the City of Bellevue, Washington, and a nearby pristine control stream suggest that urban development has resulted in a restructuring of the fish community. Environmental perturbations, including habitat alteration, increased nutrient loading, and degradation of the intragravel environment appeared to have a greater impact on coho salmon Oncorhynchus kisutch and nonsalmonid fish species than on cutthroat trout Salmo clarki. Although the total biomass (g/m 2 ) of fish in each stream was similar, its composition differed markedly. Ages 0 and I cutthroat trout were the majority of the fish community inhabiting Kelsey Creek, whereas the control stream supported a diverse assemblage of salmonids of various ages and numerous nonsalmonids. The rapid growth and greater biomass of salmonids in Kelsey Creek (a 2‐year mean of 3.51 g/m 2 versus 2.03 g/m 2 in the control stream) resulted in a total annual net production of these species of 1.6 to 3.3 times that of the control stream (a 2‐year mean of 7.6 g/m 2 versus 3.5 g/m 2 in the control stream). Marking and outmigrant studies indicated that environmental disruptions in the urban stream do not result in the displacement of the salmonid inhabitants.