干旱区生态环境知识资源中心(Arid): Characteristics of carbon sources and sinks and their relationships with climate factors during the desertification reversal process in Yulin, China

Arid

DOI	10.3389/ffgc.2023.1288449
	Characteristics of carbon sources and sinks and their relationships with climate factors during the desertification reversal process in Yulin, China
	Feng, Xiao; Fan, Qingbin; Qu, Jianjun; Ding, Xinhui; Niu, Ziru
通讯作者	Feng, X
来源期刊	FRONTIERS IN FORESTS AND GLOBAL CHANGE
EISSN	2624-893X
出版年	2023
卷号	6
英文摘要	Research on carbon sources/sinks in desert ecosystems is of great importance to understand the carbon cycle and its response to climate change. Net primary productivity (NPP) and net ecosystem productivity (NEP) are the two most important indictors for quantitatively evaluating carbon storage and can be used to indicate the response of terrestrial ecosystems to climate change. In this study, we used remote sensing data, meteorological data and vegetation type data to estimate the NPP and NEP using CASA model and soil respiration model from 2000 to 2020 in the region of Yulin, which is a typical desertification reversal region in the Mu Us Sandy Land. The spatial and temporal features of the NPP and NEP and their relationships with temperature and precipitation were determined. The results showed that both the annual NPP and NEP showed an increasing trend from 2000 to 2020 in the region of Yulin, where the terrestrial ecosystem acted as a carbon source until 2001 but turned into a sink thereafter. The carbon storage showed an increasing trend with a rate of 0.50 Tg C center dot a-1 from 2000 to 2020. Both the mean annual NPP and the total NEP increased from the west to the east of the region in spatial distribution. The total NEP indicated that the area with a carbon sink accounted for 89.22% of the total area, showing a carbon accumulation of 103.0 Tg C, and the carbon source area accounted for 10.78% of the total area with a carbon emission of 4.40 Tg C. The net carbon sequestration was 99.44 Tg C in the region of Yulin during the period from 2000 to 2020. Temperature had no significant effects on NPP and NEP for most areas of the region, while precipitation had a positive effect on the increasing NPP in 75.3% of areas and NEP in 30.07% of areas of the region. These results indicated that it is of utmost significance to protect terrestrial ecosystems from degradation, and ecological restoration projects are essential in combating desertification, which would be helpful for soil water conservation and could effectively increase carbon storage in desert ecosystems.
英文关键词	carbon sources/sinks climate change desertification reversal ecological restoration CASA
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:001120098900001
WOS关键词	NET PRIMARY PRODUCTIVITY ; COMPARING GLOBAL-MODELS ; TERRESTRIAL ECOSYSTEMS ; COMBATING DESERTIFICATION ; USE EFFICIENCY ; VEGETATION ; PRECIPITATION ; TEMPERATURE ; SEQUESTRATION ; FEEDBACKS
WOS类目	Ecology ; Forestry
WOS研究方向	Environmental Sciences & Ecology ; Forestry
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/396535
推荐引用方式 GB/T 7714	Feng, Xiao,Fan, Qingbin,Qu, Jianjun,et al. Characteristics of carbon sources and sinks and their relationships with climate factors during the desertification reversal process in Yulin, China[J],2023,6.
APA	Feng, Xiao,Fan, Qingbin,Qu, Jianjun,Ding, Xinhui,&Niu, Ziru.(2023).Characteristics of carbon sources and sinks and their relationships with climate factors during the desertification reversal process in Yulin, China.FRONTIERS IN FORESTS AND GLOBAL CHANGE,6.
MLA	Feng, Xiao,et al."Characteristics of carbon sources and sinks and their relationships with climate factors during the desertification reversal process in Yulin, China".FRONTIERS IN FORESTS AND GLOBAL CHANGE 6(2023).