Seasonally and spatially varied controls of climatic factors on net primary productivity in alpine grasslands on the Tibetan Plateau

doi:10.1016/j.gecco.2019.e00814

	Seasonally and spatially varied controls of climatic factors on net primary productivity in alpine grasslands on the Tibetan Plateau
	Zheng, Zhoutao 3; Zhu, Wenquan 4; Zhang, Yangjian 1,2,3
刊名	GLOBAL ECOLOGY AND CONSERVATION
	2020-03-01
卷号	21 页码:14
关键词	Net primary productivity Altitude dependence Climatic effects Seasonal variations Alpine grasslands
ISSN号	2351-9894
DOI	10.1016/j.gecco.2019.e00814
通讯作者	Zhang, Yangjian(zhangyj@igsnrr.ac.cn)
英文摘要	Vegetation net primary productivity (NPP) is a core parameter regulating carbon cycles of terrestrial ecosystem, which also has close relations with climates. The alpine ecosystems on the Tibetan Plateau (TP) are highly sensitive to climate changes. However, systematic analyses on the seasonal and annual responses of NPP to climatic factors in different grassland types on the TP are still lacking. In this study, the spatial and temporal patterns of NPP and their responses to temperature, precipitation and solar radiation during 2001-2015 at seasonal and annual temporal scales were investigated based on outputs of an improved CarnegieeAmeseStanford Approach (CASA) model. The improved CASA model showed solid performances in simulating NPP in reference to field observations (R-2 = 0.79, P < 0.001), resulting in mean error (ME) of -16.68, root mean square error (RMSE) of 87.59 g C.m(-2).yr(-1), and mean relative error (MRE) of -4.29%, respectively. The annual NPP displayed different altitude dependences between the regions below and above 3500 m, which could be attributed to the altitude associated precipitation variations. The temporal trends of the seasonal and annual NPP exhibited high spatial heterogeneity. For the entire alpine grasslands, solar radiation exerted stronger influences on annual NPP than temperature and precipitation did. The responses of NPP to climatic factors also varied among grassland types and seasons. For alpine meadow, solar radiation and temperature were the dominant climatic factors in controlling the NPP variability in spring and summer, respectively, while the effect of precipitation was weak in all seasons. On the contrary, precipitation played a more crucial role in influencing NPP than temperature and solar radiation in both summer and autumn for alpine steppe. Our results shed further lights on the mechanism underlying the responses of alpine ecosystem to climate changes. The improved understanding can provide guidelines for alpine grassland management. (C) 2019 The Authors. Published by Elsevier B.V.
资助项目	strategic priority research program of the Chinese Academy of Sciences[XDA20050102] ; National Natural Science Foundation of China[41571195] ; National Natural Science Foundation of China[41725003] ; National Natural Science Foundation of China[41771047] ; National Key Research and Development Program of China[2018YFA0606101] ; National Key Research and Development Program of China[2017YFA0604802]
WOS关键词	LIGHT USE EFFICIENCY ; SPRING VEGETATION PHENOLOGY ; ANTHROPOGENIC ACTIVITIES ; GREEN-UP ; CHINA ; TEMPERATURE ; RESPONSES ; SATELLITE ; MODEL ; NDVI
WOS研究方向	Biodiversity & Conservation ; Environmental Sciences & Ecology
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000517814100014
资助机构	strategic priority research program of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Key Research and Development Program of China
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/132879]
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, Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China 2.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100190, Peoples R China 3.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China 4.Beijing Normal Univ, Fac Geog Sci, Beijing 100875, Peoples R China
推荐引用方式 GB/T 7714	Zheng, Zhoutao,Zhu, Wenquan,Zhang, Yangjian. Seasonally and spatially varied controls of climatic factors on net primary productivity in alpine grasslands on the Tibetan Plateau[J]. GLOBAL ECOLOGY AND CONSERVATION,2020,21:14.
APA	Zheng, Zhoutao,Zhu, Wenquan,&Zhang, Yangjian.(2020).Seasonally and spatially varied controls of climatic factors on net primary productivity in alpine grasslands on the Tibetan Plateau.GLOBAL ECOLOGY AND CONSERVATION,21,14.
MLA	Zheng, Zhoutao,et al."Seasonally and spatially varied controls of climatic factors on net primary productivity in alpine grasslands on the Tibetan Plateau".GLOBAL ECOLOGY AND CONSERVATION 21(2020):14.