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Global assessment of experimental climate warming on tundra vegetation: heterogeneity over space and time
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2012 (English)In: Ecology Letters, ISSN 1461-023X, E-ISSN 1461-0248, Ecology Letters, Vol. 15, no 2, p. 164-175Article in journal (Refereed) Published
Abstract [en]

Ecology Letters (2011) Abstract Understanding the sensitivity of tundra vegetation to climate warming is critical to forecasting future biodiversity and vegetation feedbacks to climate. In situ warming experiments accelerate climate change on a small scale to forecast responses of local plant communities. Limitations of this approach include the apparent site-specificity of results and uncertainty about the power of short-term studies to anticipate longer term change. We address these issues with a synthesis of 61 experimental warming studies, of up to 20 €ƒyears duration, in tundra sites worldwide. The response of plant groups to warming often differed with ambient summer temperature, soil moisture and experimental duration. Shrubs increased with warming only where ambient temperature was high, whereas graminoids increased primarily in the coldest study sites. Linear increases in effect size over time were frequently observed. There was little indication of saturating or accelerating effects, as would be predicted if negative or positive vegetation feedbacks were common. These results indicate that tundra vegetation exhibits strong regional variation in response to warming, and that in vulnerable regions, cumulative effects of long-term warming on tundra vegetation – and associated ecosystem consequences – have the potential to be much greater than we have observed to date.

Place, publisher, year, edition, pages
2012. Vol. 15, no 2, p. 164-175
Keywords [en]
Alpine, Arctic, climate warming, long-term experiment, meta-analysis, plants
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Natural Sciences
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URN: urn:nbn:se:polar:diva-8242DOI: 10.1111/j.1461-0248.2011.01716.xOAI: oai:DiVA.org:polar-8242DiVA, id: diva2:1298329
Available from: 2019-03-22 Created: 2019-03-22 Last updated: 2019-03-22

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Publisher's full texthttps://onlinelibrary.wiley.com/doi/abs/10.1111/j.1461-0248.2011.01716.x
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