干旱区生态环境知识资源中心(Arid): Altitudinal Differentiation of Forest Resilience to Drought in a Dryland Mountain

Arid

DOI	10.3390/f14071284
	Altitudinal Differentiation of Forest Resilience to Drought in a Dryland Mountain
	Li, Jie; Gao, Xiang; Yan, An; Chang, Shuhang; Li, Qiuran
通讯作者	Gao, X
来源期刊	FORESTS
EISSN	1999-4907
出版年	2023
卷号	14 期号:7
英文摘要	Drought is one of the major climate disasters leading to forest degradation in dryland mountains. Hence, revealing the response of forest resilience to drought is crucial to predict forest succession in dryland mountains under future global warming. Here, we chose the Qilian Mountains as the study area and calculated the recovery time and drought intensity along elevation from 1982 to 2020 using the Leaf Area Index (LAI) and the Standardized Precipitation Evapotranspiration Index (SPEI). Then, the forest resilience to drought was calculated using the area of an exponentially fitted curve between drought intensity and corresponding recovery time. Finally, the dominant climate factors underlying altitude differentiation of forest resilience were analyzed using a random forest (RF) regression model, and correlations were determined based on a generalized additive model (GAM). The results indicate that forests in the elevation range of 2600-3900 m exhibited faster recovery rates and greater resilience compared to those in 1700-2600 m. The attributional analysis shows that altitudinal differentiation of forest resilience to drought was mainly constrained by precipitation with a non-monotonic correlation, and resilience was strongest when monthly precipitation reaches 30 mm. In terms of the occurrence of historical drought events, increased potential evapotranspiration improved resilience in the elevation range of 2600-3900 m and enhanced cloud cover initially enlarged the resilience and then decreased it in the elevation range of 3000-3400 m and 3400-3900 m, with resilience being strongest when cloud cover reached 24% and 33%, respectively. Under future climate change, global warming will further exacerbate the drought impact in arid regions, increasing the risk of primary forest collapse. The results of this study provide a scientific basis for predicting the potential changes in vegetation resilience and developing policies for ecological protection in dryland mountains, and we will take addressing the difficult study of the quantitative effects of tree species on resilience altitude differentiation based on ecosystem scales as our future direction.
英文关键词	recovery time drought intensity elevation climate factors Qilian Mountain National Park
类型	Article
语种	英语
开放获取类型	Green Submitted, gold
收录类别	SCI-E
WOS记录号	WOS:001035313300001
WOS关键词	PRECIPITATION EVAPOTRANSPIRATION INDEX ; LEAF-AREA INDEX ; LOESS PLATEAU ; POTENTIAL EVAPOTRANSPIRATION ; CLIMATE ; TEMPERATURE ; EVOLUTION ; IMPACTS ; MODELS ; DRIVEN
WOS类目	Forestry
WOS研究方向	Forestry
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/396426
推荐引用方式 GB/T 7714	Li, Jie,Gao, Xiang,Yan, An,et al. Altitudinal Differentiation of Forest Resilience to Drought in a Dryland Mountain[J],2023,14(7).
APA	Li, Jie,Gao, Xiang,Yan, An,Chang, Shuhang,&Li, Qiuran.(2023).Altitudinal Differentiation of Forest Resilience to Drought in a Dryland Mountain.FORESTS,14(7).
MLA	Li, Jie,et al."Altitudinal Differentiation of Forest Resilience to Drought in a Dryland Mountain".FORESTS 14.7(2023).