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Responses of gross primary productivity to different sizes of precipitation events in a temperate grassland ecosystem in Inner Mongolia, China
Guo Q.; Li, S. G.; Hu, Z. M.; Zhao, W.; Yu, G. R.; Sun, X. M.; Li, L. H.; Liang, N. S.; Bai, W. M.
Source PublicationJournal of Arid Land
2016
Volume8
Issue1
Pages36-46
Keywordprecipitation event grassland gross primary productivity global climate change precipitation regime extreme precipitation semiarid grassland soil respiration use efficiency rainfall variability water pulses dynamics patterns desert steppe
AbstractChanges in the sizes of precipitation events in the context of global climate change may have profound impacts on ecosystem productivity in arid and semiarid grasslands. However, we still have little knowledge about to what extent grassland productivity will respond to an individual precipitation event. In this study, we quantified the duration, the maximum, and the time-integrated amount of the response of daily gross primary productivity (GPP) to an individual precipitation event and their variations with different sizes of precipitation events in a typical temperate steppe in Inner Mongolia, China. Results showed that the duration of GPP-response (tau(R)) and the maximum absolute GPP-response (GPP(max)) increased linearly with the sizes of precipitation events (P-es), driving a corresponding increase in time-integrated amount of the GPP-response (GPP(total)) because variations of GPPtotal were largely explained by tau (R) and GPP(max). The relative contributions of these two parameters to GPP(total) were strongly P-es-dependent. The GPP(max) contributed more to the variations of GPP(total) when P-es was relatively small (< 20 mm), whereas tau (R) was the main driver to the variations of GPP(total) when P-es was relatively large. In addition, a threshold size of at least 5 mm of precipitation was required to induce a GPP-response for the temperate steppe in this study. Our work has important implications for the modeling community to obtain an advanced understanding of productivity-response of grassland ecosystems to altered precipitation regimes.
Indexed BySCI
Language英语
ISSN1674-6767
DOI10.1007/s40333-015-0136-7
Citation statistics
Cited Times:12[WOS]   [WOS Record]     [Related Records in WOS]
Document TypeSCI/SSCI论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/42962
Collection历年回溯文献
Recommended Citation
GB/T 7714
Guo Q.,Li, S. G.,Hu, Z. M.,et al. Responses of gross primary productivity to different sizes of precipitation events in a temperate grassland ecosystem in Inner Mongolia, China. 2016.
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