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Spatial pattern and temporal trend of land degradation in the Heihe River Basin of China using local net primary production scaling

文献类型：期刊论文

作者Li, Feng2; Meng, Jijun2; Zhu, Likai1; You, Nanshan3
刊名LAND DEGRADATION & DEVELOPMENT
出版日期2019-12-17
页码13
关键词drylands land capability classes land degradation local net primary production scaling NPP the Heihe River Basin
ISSN号1085-3278
DOI10.1002/ldr.3468
通讯作者Meng, Jijun(jijunm@pku.edu.cn) ; Zhu, Likai(lzhu68@163.com)
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.
WOS关键词MONITORING RANGELAND DEGRADATION ; VEGETATION COVER ; HUMAN APPROPRIATION ; HEADWATERS REGION ; NORTHERN CHINA ; LOWER REACHES ; DATA SETS ; DESERTIFICATION ; VARIABILITY ; PROJECT
资助项目National Natural Science Foundation of China[41871074] ; Shandong Provincial Natural Science Foundation, China[ZR2019BD040] ; Ministry of Education Laboratory for Earth Surface Processes, Peking University
WOS研究方向Environmental Sciences & Ecology ; Agriculture
语种英语
WOS记录号WOS:000502989400001
出版者WILEY
资助机构National Natural Science Foundation of China ; Shandong Provincial Natural Science Foundation, China ; Ministry of Education Laboratory for Earth Surface Processes, Peking University
源URL[http://ir.igsnrr.ac.cn/handle/311030/131130]  
专题中国科学院地理科学与资源研究所
通讯作者Meng, Jijun; Zhu, Likai
作者单位1.Linyi Univ, Coll Resources & Environm, Shandong Prov Key Lab Water & Soil Conservat & En, Linyi 276000, Shandong, Peoples R China
2.Peking Univ, Coll Urban & Environm Sci, Minist Educ, Key Lab Earth Surface Proc, Beijing 100871, 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]. LAND DEGRADATION & DEVELOPMENT,2019:13.
APA Li, Feng,Meng, Jijun,Zhu, Likai,&You, Nanshan.(2019).Spatial pattern and temporal trend of land degradation in the Heihe River Basin of China using local net primary production scaling.LAND DEGRADATION & DEVELOPMENT,13.
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 (2019):13.

入库方式： OAI收割

来源：地理科学与资源研究所

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