NDLI: Phenological response of tundra plants to background climate variation tested using the International Tundra Experiment

Content Provider	PubMed Central
Author	Oberbauer, S. F. Elmendorf, S. C. Troxler, T. G. Hollister, R. D. Rocha, A. V. Bret-harte, M. S. Dawes, M. A. Fosaa, A. M. Henry, G. H. R. Høye, T. T. Jarrad, F. C. Jónsdóttir, I. S. Klanderud, K. Klein, J. A. Molau, U. Rixen, C. Schmidt, N. M. Shaver, G. R. Slider, R. T. Totland, Ø. Wahren, C. H. Welker, J. M.
Copyright Year	2013
Abstract	The rapidly warming temperatures in high-latitude and alpine regions have the potential to alter the phenology of Arctic and alpine plants, affecting processes ranging from food webs to ecosystem trace gas fluxes. The International Tundra Experiment (ITEX) was initiated in 1990 to evaluate the effects of expected rapid changes in temperature on tundra plant phenology, growth and community changes using experimental warming. Here, we used the ITEX control data to test the phenological responses to background temperature variation across sites spanning latitudinal and moisture gradients. The dataset overall did not show an advance in phenology; instead, temperature variability during the years sampled and an absence of warming at some sites resulted in mixed responses. Phenological transitions of high Arctic plants clearly occurred at lower heat sum thresholds than those of low Arctic and alpine plants. However, sensitivity to temperature change was similar among plants from the different climate zones. Plants of different communities and growth forms differed for some phenological responses. Heat sums associated with flowering and greening appear to have increased over time. These results point to a complex suite of changes in plant communities and ecosystem function in high latitudes and elevations as the climate warms.
Related Links	http://dx.doi.org/10.1098/rstb.2012.0481
Starting Page	20120481
File Format	PDF
ISSN	14712970
e-ISSN	14712970
Journal	Philosophical Transactions of the Royal Society B: Biological Sciences
Issue Number	1624
Volume Number	368
Language	English
Publisher	The Royal Society
Publisher Date	2013-08-19
Access Restriction	Open
Rights Holder	The Royal Society
Subject Keyword	Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Biochemistry, Genetics and Molecular Biology Agricultural and Biological Sciences

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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