干旱区生态环境知识资源中心(Arid): A process-based model reveals the restoration gap of degraded grasslands in Inner Mongolian steppe

Arid

DOI	10.1016/j.scitotenv.2021.151324
	A process-based model reveals the restoration gap of degraded grasslands in Inner Mongolian steppe
	Wu, Lu; Liu, Hongyan; Liang, Boyi; Zhu, Xinrong; Cao, Jing; Wang, Qiuming; Jiang, Lubing; Cressey, Elizabeth L.; Quine, Timothy A.
通讯作者	Liu, HY (corresponding author)，Peking Univ, Coll Urban & Environm Sci, Beijing, Peoples R China. ; Liu, HY (corresponding author)，Peking Univ, MOE Lab Earth Surface Proc, Beijing, Peoples R China.
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
ISSN	0048-9697
EISSN	1879-1026
出版年	2022
卷号	806
英文摘要	Due to the influence of climate change and extensive grazing, a large proportion of steppe grassland has been degraded worldwide. The Chinese government initiated a series of grassland restoration programs to reverse the degradation. However, the limiting factors and the restoration potential remain unknown. Here we present a process-based model to assess the restoration gap (RG) defined as maximum biomass differences between non-degraded and degraded grasslands with different degrees of soil and vegetation degradation. The process-based model Agricultural Production Systems Simulator (APSIM) was evaluated utilizing observation data from both typical and meadow steppes under natural conditions in terms of phenology, dynamics of aboveground biomass and soil water content Scenario analysis and sensitivity analysis were subsequently performed to address the RG and controlling factors during 1969-2018. The results showed that the calibrated model performed well with r > 0.75 and model efficiency factor EF > 0.5 for all the simulation components. According to our model results, the RG was larger in typical steppe compared to that of meadow steppe and it increased with increasing soil and/or vegetation degradation, to similar to 60% under extremely degraded scenarios. Both soil and vegetation degradation led to reduced water use efficiency, with an elevated proportion of soil evaporation to evapotranspiration (Es/ET), however, the limiting factor for RG varied. The degradation of soil water holding capacity contributed more to RG regardless of climate conditions for typical steppe in all years and for meadow steppe in dry years. In wet years the importance of vegetation coverage reduction increased for RG in meadow steppe, where the relative importance of vegetation coverage (valued at 62.8%) was 25.6% higher than that of soil degradation. Our results demonstrated the importance of considering climate variations when developing protection and restoration programs for grassland ecosystems. (C) 2021 Elsevier B.V. All rights reserved.
英文关键词	Grassland Restoration gap Inner Mongolian steppe Process-based model Soil water holding capacity Vegetation coverage
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000740216300016
WOS关键词	SOIL PROPERTIES ; CLIMATE-CHANGE ; PRODUCTIVITY ; VEGETATION ; GROWTH ; LAND ; PRECIPITATION ; RESPONSES ; DROUGHTS ; DESERT
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/2XILL650/376945
作者单位	[Wu, Lu; Liu, Hongyan; Liang, Boyi; Zhu, Xinrong; Cao, Jing; Wang, Qiuming; Jiang, Lubing] Peking Univ, Coll Urban & Environm Sci, Beijing, Peoples R China; [Wu, Lu; Liu, Hongyan; Liang, Boyi; Zhu, Xinrong; Cao, Jing; Wang, Qiuming; Jiang, Lubing] Peking Univ, MOE Lab Earth Surface Proc, Beijing, Peoples R China; [Cressey, Elizabeth L.; Quine, Timothy A.] Univ Exeter, Coll Life & Environm Sci, Geog, Exeter EX4 4RJ, Devon, England
推荐引用方式 GB/T 7714	Wu, Lu,Liu, Hongyan,Liang, Boyi,et al. A process-based model reveals the restoration gap of degraded grasslands in Inner Mongolian steppe[J],2022,806.
APA	Wu, Lu.,Liu, Hongyan.,Liang, Boyi.,Zhu, Xinrong.,Cao, Jing.,...&Quine, Timothy A..(2022).A process-based model reveals the restoration gap of degraded grasslands in Inner Mongolian steppe.SCIENCE OF THE TOTAL ENVIRONMENT,806.
MLA	Wu, Lu,et al."A process-based model reveals the restoration gap of degraded grasslands in Inner Mongolian steppe".SCIENCE OF THE TOTAL ENVIRONMENT 806(2022).