CraineOcheltreeNippertEtAl2013

Référence

Craine, J.M., Ocheltree, T.W., Nippert, J.B., Towne, E.G., Skibbe, A.M., Kembel, S.W. and Fargione, J.E. (2013) Global diversity of drought tolerance and grassland climate-change resilience. Nature Climate Change, 3(1):63-67. (Scopus )

Résumé

Drought reduces plant productivity, induces widespread plant mortality and limits the geographic distribution of plant species. As climates warm and precipitation patterns shift in the future, understanding the distribution of the diversity of plant drought tolerance is central to predicting future ecosystem function and resilience to climate change. These questions are especially pressing for the world's 11,000 grass species, which dominate a large fraction of the terrestrial biosphere, yet are poorly characterized with respect to responses to drought. Here, we show that physiological drought tolerance, which varied tenfold among 426 grass species, is well distributed both climatically and phylogenetically, suggesting most native grasslands are likely to contain a high diversity of drought tolerance. Consequently, local species may help maintain ecosystem functioning in response to changing drought regimes without requiring long-distance migrations of grass species. Furthermore, physiologically drought-tolerant species had higher rates of water and carbon dioxide exchange than intolerant species, indicating that severe droughts may generate legacies for ecosystem functioning. In all, our findings suggest that diverse grasslands throughout the globe have the potential to be resilient to drought in the face of climate change through the local expansion of drought-tolerant species. © 2013 Macmillan Publishers Limited. All rights reserved.

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@ARTICLE { CraineOcheltreeNippertEtAl2013,
    AUTHOR = { Craine, J.M. and Ocheltree, T.W. and Nippert, J.B. and Towne, E.G. and Skibbe, A.M. and Kembel, S.W. and Fargione, J.E. },
    TITLE = { Global diversity of drought tolerance and grassland climate-change resilience },
    JOURNAL = { Nature Climate Change },
    YEAR = { 2013 },
    VOLUME = { 3 },
    PAGES = { 63-67 },
    NUMBER = { 1 },
    ABSTRACT = { Drought reduces plant productivity, induces widespread plant mortality and limits the geographic distribution of plant species. As climates warm and precipitation patterns shift in the future, understanding the distribution of the diversity of plant drought tolerance is central to predicting future ecosystem function and resilience to climate change. These questions are especially pressing for the world's 11,000 grass species, which dominate a large fraction of the terrestrial biosphere, yet are poorly characterized with respect to responses to drought. Here, we show that physiological drought tolerance, which varied tenfold among 426 grass species, is well distributed both climatically and phylogenetically, suggesting most native grasslands are likely to contain a high diversity of drought tolerance. Consequently, local species may help maintain ecosystem functioning in response to changing drought regimes without requiring long-distance migrations of grass species. Furthermore, physiologically drought-tolerant species had higher rates of water and carbon dioxide exchange than intolerant species, indicating that severe droughts may generate legacies for ecosystem functioning. In all, our findings suggest that diverse grasslands throughout the globe have the potential to be resilient to drought in the face of climate change through the local expansion of drought-tolerant species. © 2013 Macmillan Publishers Limited. All rights reserved. },
    COMMENT = { Cited By (since 1996): 1 Export Date: 16 January 2013 Source: Scopus doi: 10.1038/nclimate1634 },
    ISSN = { 1758678X (ISSN) },
    OWNER = { Luc },
    TIMESTAMP = { 2013.01.16 },
    URL = { http://www.scopus.com/inward/record.url?eid=2-s2.0-84871846344&partnerID=40&md5=4b50bc13373a65378e714f55265abcc6 },
}

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