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Tundra in the rain: Differential vegetation responses to three years of experimentally doubled summer precipitation in Siberian shrub and Swedish bog tundra
Umeå University, Faculty of Science and Technology, Department of Ecology and Environmental Sciences. (Vrije Univ Amsterdam, Dept Ecol Sci, Fac Earth & Life Sci, Amsterdam, Netherlands)
Lund Univ, Dept Phys Geog & Ecosyst Sci, Lund, Sweden .
Univ Copenhagen, Ctr Permafrost Dynam Greenland CENPERM, Copenhagen, Denmark .
Vrije Univ Amsterdam, Dept Ecol Sci, Fac Earth & Life Sci, Amsterdam, Netherlands.
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2012 (English)In: Ambio, ISSN 0044-7447, E-ISSN 1654-7209, Vol. 41, no Suppl. 3, 269-280 p.Article in journal (Refereed) Published
Abstract [en]

Precipitation amounts and patterns at high latitude sites have been predicted to change as a result of global climatic changes. We addressed vegetation responses to three years of experimentally increased summer precipitation in two previously unaddressed tundra types: Betula nana-dominated shrub tundra (northeast Siberia) and a dry Sphagnum fuscum-dominated bog (northern Sweden). Positive responses to approximately doubled ambient precipitation (an increase of 200 mm year(-1)) were observed at the Siberian site, for B. nana (30 % larger length increments), Salix pulchra (leaf size and length increments) and Arctagrostis latifolia (leaf size and specific leaf area), but none were observed at the Swedish site. Total biomass production did not increase at either of the study sites. This study corroborates studies in other tundra vegetation types and shows that despite regional differences at the plant level, total tundra plant productivity is, at least at the short or medium term, largely irresponsive to experimentally increased summer precipitation.

Place, publisher, year, edition, pages
Springer Netherlands, 2012. Vol. 41, no Suppl. 3, 269-280 p.
Keyword [en]
Water addition, Plant traits, Irrigation, Primary production, Subarctic, High latitude
National Category
Climate Research Ecology
Identifiers
URN: urn:nbn:se:umu:diva-58915DOI: 10.1007/s13280-012-0305-2ISI: 000307285200010OAI: oai:DiVA.org:umu-58915DiVA: diva2:550746
Available from: 2012-09-07 Created: 2012-09-06 Last updated: 2017-12-07Bibliographically approved

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Keuper, FridaDorrepaal, Ellen
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CiteExportLink to record
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  • apa
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