The divergent impact of phenology change on the productivity of alpine grassland due to different timing of drought on the Tibetan Plateau
Author
Hu, GuozhengGao, Qingzhu
Ganjurjav, Hasbagan
Wang, Zixin
Luo, Wenrong
Wu, Hongbao
Li, Yu
Yan, Yulong
Gornish, Elise S.
Schwartz, Mark W.
Wan, Yunfan
Li, Yue
Affiliation
School of Natural Resources and the Environment, University of ArizonaIssue Date
2021-06-08Keywords
aboveground biomassearly growing season drought
green-up date
growing season duration
middle growing season drought
withered date
Metadata
Show full item recordPublisher
WileyCitation
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 DevelopmentRights
© 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 2021ISSN
1085-3278EISSN
1099-145XDOI
10.1002/ldr.3889Version
Final accepted manuscriptSponsors
National Natural Science Foundation of Chinaae974a485f413a2113503eed53cd6c53
10.1002/ldr.3889