Direct and Lagged Effects of Spring Phenology on Net Primary Productivity in the Alpine Grasslands on the Tibetan Plateau

doi:10.3390/rs12071223

	Direct and Lagged Effects of Spring Phenology on Net Primary Productivity in the Alpine Grasslands on the Tibetan Plateau
	Zheng, Zhoutao 1; Zhu, Wenquan 2; Zhang, Yangjian 1,3,4
刊名	REMOTE SENSING
	2020-04-01
卷号	12 期号:7 页码:14
关键词	spring phenology net primary productivity lagged effect alpine grasslands precipitation Tibetan Plateau
DOI	10.3390/rs12071223
通讯作者	Zhang, Yangjian(zhangyj@igsnrr.ac.cn)
英文摘要	As a key biotic factor, phenology exerts fundamental influences on ecosystem carbon sequestration. However, whether spring phenology affects the subsequent seasonal ecosystem productivity and the underlying resource limitation mechanism remains unclear for the alpine grasslands of the Tibetan Plateau (TP). In this study, we investigated the direct and lagged seasonal responses of net primary productivity (NPP) to the beginning of growing season (BGS) along a precipitation gradient by integrating field observations, remote sensing monitoring and ecosystem model simulations. The results revealed distinct response patterns of seasonal NPP to BGS. Specifically, the BGS showed a significant and negative correlation with spring NPP (R = -0.73, p < 0.01), as evidenced by the direct boosting effects of earlier BGS on spring NPP. Moreover, spring NPP was more responsive to BGS in areas with more annual precipitation. The boosting effects of earlier BGS on NPP tended to weaken in summer compared with that in spring. Sequentially, BGS exhibited stronger positive correlation with autumn NPP in areas with less annual precipitation, which suggested the enhanced lagged suppressing effects of earlier spring phenology on ecosystem carbon assimilation during the later growing season under aggravated water stress. Overall, the strengthened NPP in spring was offset by its decrement in autumn, resulting in no obvious relationship between BGS and annual NPP (R = -0.34, p > 0.05) for the entire grasslands on the TP. The findings of this study imply that the lagged effects of phenology on the ecosystem productivity during the subsequent seasons should not be neglected in the future studies.
资助项目	strategic priority research program of the Chinese Academy of Sciences[XDA19070303] ; National Natural Science Foundation of China[41901131] ; National Natural Science Foundation of China[41725003] ; National Natural Science Foundation of China[41771047] ; CAS Interdisciplinary Innovation Team[JCTD-2018-06]
WOS关键词	INTERANNUAL VARIABILITY ; CLIMATE-CHANGE ; CARBON BALANCE ; ECOSYSTEM PRODUCTIVITY ; VEGETATION PHENOLOGY ; IMPACTS ; AUTUMN ; FLUXES ; FOREST ; SEASON
WOS研究方向	Remote Sensing
语种	英语
出版者	MDPI
WOS记录号	WOS:000537709600173
资助机构	strategic priority research program of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; CAS Interdisciplinary Innovation Team
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/159442]
专题	中国科学院地理科学与资源研究所
通讯作者	Zhang, Yangjian
作者单位	1.Chinese Acad Sci, Key Lab Ecosyst Network Observat & Modeling, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China 2.Beijing Normal Univ, Fac Geog Sci, Beijing 100875, Peoples R China 3.Chinese Acad Sci, CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China 4.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Zheng, Zhoutao,Zhu, Wenquan,Zhang, Yangjian. Direct and Lagged Effects of Spring Phenology on Net Primary Productivity in the Alpine Grasslands on the Tibetan Plateau[J]. REMOTE SENSING,2020,12(7):14.
APA	Zheng, Zhoutao,Zhu, Wenquan,&Zhang, Yangjian.(2020).Direct and Lagged Effects of Spring Phenology on Net Primary Productivity in the Alpine Grasslands on the Tibetan Plateau.REMOTE SENSING,12(7),14.
MLA	Zheng, Zhoutao,et al."Direct and Lagged Effects of Spring Phenology on Net Primary Productivity in the Alpine Grasslands on the Tibetan Plateau".REMOTE SENSING 12.7(2020):14.