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The direct contribution of fish to lake phosphorus cycles

Biomedical Sciences Research Institute Computer Science Research Institute Environmental Sciences Research Institute Nanotechnology & Advanced Materials Research Institute

Griffiths, D (2006) The direct contribution of fish to lake phosphorus cycles. ECOLOGY OF FRESHWATER FISH, 15 (1). pp. 86-95. [Journal article]

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DOI: 10.1111/j.1600-0633.2006.00125.x

Abstract

Published data are synthesised to assess the direct contribution of fish to the recycling of phosphorus across a lake productivity gradient. Phosphorus excretion rates by fish assemblages are more or less directly proportional to fish biomass, despite changes in mean body mass, species composition and diet with increasing lake productivity. Piecewise linear regression of published data shows for the first time that lacustrine fish biomass increases with total phosphorus (TP) concentration in the water column up to around 140 mu g.TP.l(-1) but levels off above that value, suggesting that fish contribute less to nutrient recycling as lake productivity increases. The results confirm previous findings that water column nutrient recycling by fish is much less important than by plankton and that fish are important nutrient stores in lakes. The contribution of fish to nutrient recycling is small because of their low turnover rates relative to other taxa.

Item Type:Journal article
Faculties and Schools:Faculty of Life and Health Sciences
Faculty of Life and Health Sciences > School of Environmental Sciences
Research Institutes and Groups:Environmental Sciences Research Institute > Freshwater Sciences
ID Code:13742
Deposited By:Mrs Linda Allen
Deposited On:31 May 2010 10:53
Last Modified:28 Mar 2012 16:27

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