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    The divergent impact of phenology change on the productivity of alpine grassland due to different timing of drought on the Tibetan Plateau

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    Author
    Hu, Guozheng
    Gao, Qingzhu
    Ganjurjav, Hasbagan
    Wang, Zixin
    Luo, Wenrong
    Wu, Hongbao
    Li, Yu
    Yan, Yulong
    Gornish, Elise S.
    Schwartz, Mark W.
    Wan, Yunfan
    Li, Yue
    Show allShow less
    Affiliation
    School of Natural Resources and the Environment, University of Arizona
    Issue Date
    2021-06-08
    Keywords
    aboveground biomass
    early growing season drought
    green-up date
    growing season duration
    middle growing season drought
    withered date
    
    Metadata
    Show full item record
    Publisher
    Wiley
    Citation
    Hu, G., Gao, Q., Ganjurjav, H., Wang, Z., Luo, W., Wu, H., Li, Y., Yan, Y., Gornish, E. S., Schwartz, M. W., Wan, Y., & Li, Y. (2021). The divergent impact of phenology change on the productivity of alpine grassland due to different timing of drought on the Tibetan Plateau. Land Degradation and Development.
    Journal
    Land Degradation and Development
    Rights
    © 2021 John Wiley & Sons, Ltd.
    Collection Information
    This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.
    Abstract
    Droughts are predicted to become more frequent and persist for longer periods in the future, especially in alpine regions due to climate change. However, the association mechanism between plant productivity response to drought timing and phenology in the alpine grassland of the Tibetan Plateau is unclear. We conducted manipulative drought experiments on early growing season drought (ED) and middle growing season drought (MD) to determine the impacts of drought timing on the alpine grassland. The results showed ED significantly delayed the green-up of the community vegetation (8.20%, p <.05). However, MD advanced the withered date of the community vegetation (−2.98%, p <.05). ED and MD depressed the growing season duration, cover, height, and the aboveground biomass of the community vegetation. However, the structural equation model revealed that the effect of phenology changes on the aboveground net primary production shifts was divergent among graminoid, weeds, and community. Our results shed light on the drought tolerance mechanisms of diverse vegetation groups at different drought timings. Thus, the drought timing should not be neglected in climate change studies, especially in research related to climate extremes. © 2021 John Wiley & Sons, Ltd.
    Note
    12 month embargo; first published: 13 January 2021
    ISSN
    1085-3278
    EISSN
    1099-145X
    DOI
    10.1002/ldr.3889
    Version
    Final accepted manuscript
    Sponsors
    National Natural Science Foundation of China
    ae974a485f413a2113503eed53cd6c53
    10.1002/ldr.3889
    Scopus Count
    Collections
    UA Faculty Publications

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