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Productivity of high-latitude lakes: climate effect inferred from altitude gradient
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.
Umeå University, Faculty of Science and Technology, Department of Ecology and Environmental Sciences.
2005 (English)In: Global Change Biology, ISSN 1354-1013, E-ISSN 1365-2486, Vol. 11, no 5, 710-715 p.Article in journal (Refereed) Published
Abstract [en]

Climate change is predicted to be dramatic at high latitudes. Still, climate impact on high latitude lake ecosystems is poorly understood. We studied 15 subarctic lakes located in a climate gradient comprising an air temperature difference of about 6° C. We show that lake water productivity varied by one order of magnitude along the temperature gradient. This variation was mainly caused by variations in the length of the ice-free period and, more importantly, in the supply of organic carbon and inorganic nutrients, which followed differences in terrestrial vegetation cover along the gradient. The results imply that warming will have rapid effects on the productivity of high latitude lakes, by prolongation of ice-free periods. However, a more pronounced consequence will be a delayed stimulation of the productivity following upon changes of the lakes terrestrial surroundings and subsequent increasing input of elements that stimulate the production of lake biota.

Place, publisher, year, edition, pages
2005. Vol. 11, no 5, 710-715 p.
Keyword [en]
allochthonous carbon, bacterioplankton, catchment characteristics, climate change, energy mobilization, lake productivity, nutrients, phytoplankton, subarctic, temperature
Identifiers
URN: urn:nbn:se:umu:diva-51628DOI: 10.1111/j.1365-2486.2005.00945.xISI: 000229069800002OAI: oai:DiVA.org:umu-51628DiVA: diva2:485913
Available from: 2012-01-30 Created: 2012-01-30 Last updated: 2017-12-08

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Karlsson, JanJonsson, AndersJansson, Mats
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