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Lake morphometry moderates the relationship between water color and fish biomass in small boreal lakes
Umeå University, Faculty of Science and Technology, Department of Ecology and Environmental Sciences.ORCID iD: 0000-0001-6700-6149
Umeå University, Faculty of Science and Technology, Department of Ecology and Environmental Sciences.
Umeå University, Faculty of Science and Technology, Department of Ecology and Environmental Sciences.ORCID iD: 0000-0001-5730-0694
2018 (English)In: Limnology and Oceanography, ISSN 0024-3590, E-ISSN 1939-5590, Vol. 63, no 5, p. 2171-2178Article in journal (Refereed) Published
Abstract [en]

Lake morphometry may moderate the effects of water color on fish biomass in boreal lakes, but empirical evidence is scarce because there are a limited number of lakes for which both water color and bathymetry have been measured. We evaluated variations in catch-per-unit-effort (CPUE), an indicator of fish biomass, across orthogonal gradients of light extinction and mean depth in 16 small Swedish lakes (mean depth 1.7-4.8 m, surface area 1-10 ha). Multiple regression coefficients indicated that the effect of light extinction on CPUE was negative, and that the relationship was more negative for deeper lakes than it was for shallower lakes. The pattern was strongest for lakes with mean depths between 2.1 m and 3.5 m. We estimated that 26% of small lakes in boreal Sweden fall within this mean depth range. These results contribute to the growing understanding of how variations in water color and lake morphometry influence patterns of fish biomass across the boreal landscape.

Place, publisher, year, edition, pages
Wiley-Blackwell, 2018. Vol. 63, no 5, p. 2171-2178
National Category
Ecology Oceanography, Hydrology and Water Resources
Identifiers
URN: urn:nbn:se:umu:diva-153666DOI: 10.1002/lno.10931ISI: 000449045600021OAI: oai:DiVA.org:umu-153666DiVA, id: diva2:1265889
Funder
Carl Tryggers foundation Knut and Alice Wallenberg FoundationSwedish Research Council, 621-2011-3908Swedish Research Council, 621-2010-4675Swedish Research Council Formas, 215-2010-992Available from: 2018-11-26 Created: 2018-11-26 Last updated: 2018-11-26Bibliographically approved

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Seekell, David A.Byström, PärKarlsson, Jan

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