干旱区生态环境知识资源中心(Arid): Contrasting Responses of Vegetation Production to Rainfall Anomalies Across the Northeast China Transect

Arid

DOI	10.1029/2022JG006842
	Contrasting Responses of Vegetation Production to Rainfall Anomalies Across the Northeast China Transect
	Zhao, Huichen; Jia, Gensuo; Xu, Xiyan; Zhang, Anzhi
通讯作者	Jia, GS
来源期刊	JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
ISSN	2169-8953
EISSN	2169-8961
出版年	2022
卷号	127 期号:6
英文摘要	Increases in rainfall variability due to climate change influence gross primary production (GPP) in drylands, with important consequences for terrestrial carbon budget. However, it is not well understood if GPP responds in heterogeneous or even contrasting ways along the temperate bioclimate gradients. Here, based on satellite observations from 2001 to 2020, we identified rainfall anomalies as the magnitude of rainfall beyond its mean of one standard deviation, and examined differential responses of GPP to rainfall anomalies across Northeast China Transect (NECT). We found wet anomalies caused major GPP increase in western arid part of NECT, and the magnitude of increased GPP declined gradually toward the eastern humid region. As a result, GPP increased in desert steppe while decreased in mesic forest in response to wet anomalies. On the contrary, dry anomalies reduced GPP across the ecosystems except for mesic forest. The meadow steppe in the transition region between semi-arid and sub-humid regions, which lacks of drought-tolerant species, showed greater GPP decline in response to dry anomalies than desert and typical steppe in the arid region. The heterogeneous responses of GPP to wet and dry anomalies resulted in contrasting asymmetries in diverse biomes, showing positive asymmetry in drier region, that is, greater magnitude of GPP increase in response to wet anomalies than GPP decrease in response to dry anomalies, and negative asymmetry in wetter region, with a transition between arid and semi-arid regions. Our findings highlight that increased rainfall variability will enhance heterogeneous and even contrasting GPP changes along temperate bioclimate gradients.
英文关键词	rainfall variability vegetation GPP asymmetry NECT
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000814071200001
WOS关键词	NET PRIMARY PRODUCTION ; SEMIARID ECOSYSTEMS ; USE EFFICIENCY ; VARIABILITY ; LAND ; SENSITIVITY ; GRADIENT ; DROUGHT ; GROSS
WOS类目	Environmental Sciences ; Geosciences, Multidisciplinary
WOS研究方向	Environmental Sciences & Ecology ; Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/393460
推荐引用方式 GB/T 7714	Zhao, Huichen,Jia, Gensuo,Xu, Xiyan,et al. Contrasting Responses of Vegetation Production to Rainfall Anomalies Across the Northeast China Transect[J],2022,127(6).
APA	Zhao, Huichen,Jia, Gensuo,Xu, Xiyan,&Zhang, Anzhi.(2022).Contrasting Responses of Vegetation Production to Rainfall Anomalies Across the Northeast China Transect.JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,127(6).
MLA	Zhao, Huichen,et al."Contrasting Responses of Vegetation Production to Rainfall Anomalies Across the Northeast China Transect".JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES 127.6(2022).