干旱区生态环境知识资源中心(Arid): Spatial pattern and temporal trend of land degradation in the Heihe River Basin of China using local net primary production scaling

Arid

DOI	10.1002/ldr.3468
	Spatial pattern and temporal trend of land degradation in the Heihe River Basin of China using local net primary production scaling
	Li, Feng 1; Meng, Jijun 1; Zhu, Likai 2; You, Nanshan 3
通讯作者	Meng, Jijun ; Zhu, Likai
来源期刊	LAND DEGRADATION & DEVELOPMENT
ISSN	1085-3278
EISSN	1099-145X
出版年	2020
卷号	31 期号:4 页码:518-530
英文摘要	Biophysical processes and people's livelihoods largely depend on ecosystem productivity; thus, land degradation is harmful for local sustainable development. Most previous assessments of land degradation used a comprehensive index system or trend analysis without localized benchmarks; thus, they were not fully objective. Here, we assessed the land degradation in the Heihe River Basin (HRB), China using the local net primary production (NPP) scaling (LNS) method. We improved the method by dividing land capability classes (LCC) using remote sensing data, and determining the reference NPP for each LCC to represent the productivity under optimal environmental conditions. To assess the extent, severity and trend of land degradation, we obtained LNS percent values which was defined as the ratio of present NPP to reference NPP. We categorized our identified land degradation hotspots, determined their causes and proposed potential strategies for land conservation. Our results showed that nearly one quarter of the area was degraded land, mainly located in the upper stream. The average NPP was 35.75% lower than the reference NPP, with a reduction amount of 0.82 GgC yr(-1). Only the lower stream showed a significant decreasing trend in LNS percent values. The areas with a positive trend in LNS percent values were primarily observed in the middle stream croplands. We found the degradation condition deteriorated first and recovered later in the HRB. Land use change contributed more than climate change to the local NPP of the degraded areas. Our research provides a more general framework for assessing land productivity reduction induced by anthropogenic and natural processes in the drylands.
英文关键词	drylands land capability classes land degradation local net primary production scaling NPP the Heihe River Basin
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000502989400001
WOS关键词	MONITORING RANGELAND DEGRADATION ; VEGETATION COVER ; HUMAN APPROPRIATION ; HEADWATERS REGION ; NORTHERN CHINA ; LOWER REACHES ; DATA SETS ; DESERTIFICATION ; VARIABILITY ; PROJECT
WOS类目	Environmental Sciences ; Soil Science
WOS研究方向	Environmental Sciences & Ecology ; Agriculture
EI主题词	2019-12-17
来源机构	中国科学院地理科学与资源研究所 ; 北京大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/311829
作者单位	1.Peking Univ, Coll Urban & Environm Sci, Minist Educ, Key Lab Earth Surface Proc, Beijing 100871, Peoples R China; 2.Linyi Univ, Coll Resources & Environm, Shandong Prov Key Lab Water & Soil Conservat & En, Linyi 276000, Shandong, Peoples R China; 3.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Land Surface Pattern & Simulat, Beijing 100101, Peoples R China
推荐引用方式 GB/T 7714	Li, Feng,Meng, Jijun,Zhu, Likai,et al. Spatial pattern and temporal trend of land degradation in the Heihe River Basin of China using local net primary production scaling[J]. 中国科学院地理科学与资源研究所, 北京大学,2020,31(4):518-530.
APA	Li, Feng,Meng, Jijun,Zhu, Likai,&You, Nanshan.(2020).Spatial pattern and temporal trend of land degradation in the Heihe River Basin of China using local net primary production scaling.LAND DEGRADATION & DEVELOPMENT,31(4),518-530.
MLA	Li, Feng,et al."Spatial pattern and temporal trend of land degradation in the Heihe River Basin of China using local net primary production scaling".LAND DEGRADATION & DEVELOPMENT 31.4(2020):518-530.