Guo Qun1; Li Shenggong1; Hu Zhongmin1; Zhao Wei1; Yu Guirui1; Sun Xiaomin1; Li Linghao2; Liang Naishen3; Bai Wenming2
Source Publicationjournalofaridland
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 (τ_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 GPP_(total) were largely explained by τ_R and GPP_(max). The relative contributions of these two parameters to GPP_(total) were strongly Pes-dependent. The GPP_(max) contributed more to the variations of GPP_(total) when P_(es) was relatively small (<20 mm), whereas τ_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.
Document Type期刊论文
3.Global Carbon Cycle Research Section Center for Global Environmental Research, National Institute for Environmental Studies
First Author Affilication中国科学院地理科学与资源研究所
Recommended Citation
GB/T 7714
Guo Qun,Li Shenggong,Hu Zhongmin,et al. responsesofgrossprimaryproductivitytodifferentsizesofprecipitationeventsinatemperategrasslandecosystemininnermongoliachina[J]. journalofaridland,2016,8(1):36.
APA Guo Qun.,Li Shenggong.,Hu Zhongmin.,Zhao Wei.,Yu Guirui.,...&Bai Wenming.(2016).responsesofgrossprimaryproductivitytodifferentsizesofprecipitationeventsinatemperategrasslandecosystemininnermongoliachina.journalofaridland,8(1),36.
MLA Guo Qun,et al."responsesofgrossprimaryproductivitytodifferentsizesofprecipitationeventsinatemperategrasslandecosystemininnermongoliachina".journalofaridland 8.1(2016):36.
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