干旱区生态环境知识资源中心(Arid): Grassland type-dependent spatiotemporal characteristics of productivity in Inner Mongolia and its response to climate factors

Arid

DOI	10.1016/j.scitotenv.2021.145644
	Grassland type-dependent spatiotemporal characteristics of productivity in Inner Mongolia and its response to climate factors
	Guo, Da; Song, Xiaoning; Hu, Ronghai; Cai, Shuohao; Zhu, Xinming; Hao, Yanbin
通讯作者	Song, XN (corresponding author), Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China.
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
ISSN	0048-9697
EISSN	1879-1026
出版年	2021
卷号	775
英文摘要	Grassland located in the arid and semi-arid ecosystems has an evident ecological fragility and is easily vulnerable to climatic variations. Although several studies have shown the close relationship between net primary production (NPP) and seasonal or annual climate changes, it is currently unclear that whether such response in semiarid regions is associated with grassland types that have different physiological characteristics, especially in the grassland ecosystem of Inner Mongolia that spans meadow-typical-desert steppe. This study used NPP estimated by Carnegie-Ames Stanford Approach (CASA) model, and focused on grassland type-dependent spatiotemporal changes of NPP and its response to climate factors on annual and seasonal scales. The results showed that the NPP simulated by the CASA model was in good agreement with the ground-observed NPP (R-2 = 0.62, P < 0.001), and the RMSE value was 22.91 gC . m(-2). From 2001 to 2018, grassland NPP increased marginally with the increment of 0.89gC . m(-2) . yr(-1), the average NPP was 341.55gC . m(-2) . yr(-1), and there was a gradual decline from northeast to southwest. On the annual scale, grassland NPP had the strongest positive correlation with precipitation, followed by solar radiation and a negative correlation with temperature. On the seasonal scale, precipitation still had the greatest impact on NPP. In spring, grassland and solar radiation were positively correlated, but in summer and autumn, there was no significant correlation. In autumn, grassland had a positive correlation with temperature, while in spring and summer, there showed a negative correlation. For different grassland types, precipitation was the most important factor that influencing temperate typical steppe and temperate salted meadow in spring and summer, while solar radiation had the strongest effect on temperate desert steppe and temperate meadow. Temperate meadow steppe and temperate swamp meadow were most affected by precipitation in spring, while they were most affected by solar radiation in summer. (C) 2021 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
英文关键词	Inner Mongolia Grassland Net primary production Climate response
类型	Article
语种	英语
开放获取类型	hybrid
收录类别	SCI-E
WOS记录号	WOS:000641612200014
WOS关键词	NET PRIMARY PRODUCTIVITY ; LIGHT-USE EFFICIENCY ; TEMPERATE GRASSLANDS ; GLOBAL GRASSLAND ; MANN-KENDALL ; CHINA ; ECOSYSTEM ; DYNAMICS ; PLATEAU ; IMPACTS
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/351656
作者单位	[Guo, Da; Song, Xiaoning; Hu, Ronghai; Cai, Shuohao; Zhu, Xinming] Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China; [Hao, Yanbin] Univ Chinese Acad Sci, Coll Life Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Guo, Da,Song, Xiaoning,Hu, Ronghai,et al. Grassland type-dependent spatiotemporal characteristics of productivity in Inner Mongolia and its response to climate factors[J],2021,775.
APA	Guo, Da,Song, Xiaoning,Hu, Ronghai,Cai, Shuohao,Zhu, Xinming,&Hao, Yanbin.(2021).Grassland type-dependent spatiotemporal characteristics of productivity in Inner Mongolia and its response to climate factors.SCIENCE OF THE TOTAL ENVIRONMENT,775.
MLA	Guo, Da,et al."Grassland type-dependent spatiotemporal characteristics of productivity in Inner Mongolia and its response to climate factors".SCIENCE OF THE TOTAL ENVIRONMENT 775(2021).