干旱区生态环境知识资源中心(Arid): Large scale reforestation of farmlands on sloping hills in South China karst

Arid

DOI	10.1007/s10980-020-01026-4
	Large scale reforestation of farmlands on sloping hills in South China karst
	Yue, Yuemin 1,2; Liao, Chujie 1,3; Tong, Xiaowei 1,4; Wu, Zhaobai 5; Fensholt, Rasmus 4; Prishchepov, Alexander 4; Jepsen, Martin Rudbeck 4; Wang, Kelin 1,2; Brandt, Martin 4
通讯作者	Liao, Chujie ; Wang, Kelin
来源期刊	LANDSCAPE ECOLOGY
ISSN	0921-2973
EISSN	1572-9761
出版年	2020
卷号	35 期号:6 页码:1445-1458
英文摘要	Context South China karst is undergoing large scale land-use conversions driven by reforestation projects aiming at combating land degradation. However, the spatial extent of these human induced land-use changes is largely unknown. Objectives This study aims at quantifying land use changes in South China karst in the context of large scale restoration and reforestation projects. Results We apply an extensive field survey on land-use mapping and find that 45,406 km(2) of farmland have been converted to forest, while 41,811 km(2) have been deforested (likely due to timber harvest), which corresponds to a forest expansion of 6%, and an 8% contraction of farmlands. We find that the converted areas agree well with satellite observed greening trends, explaining why South China karst is considered a global hot-spot of vegetation cover increase. In total, 43% of the farmland to forest conversions have taken place on sloping hills steeper than 25 degrees and predominantly at larger distances from settlements. However, 19,464 km(2) of the steep sloping areas were still farmland in 2016, which is 15% of the total farmland in South China karst. Conclusions Large scale forest dynamics are observed on sloping hills. Given the low agricultural productivity but high erosion risk, considerations regarding loss of crop production and local food security must be balanced against gains in expected provisioning of ecosystem services (e.g. carbon sequestration, timber production).
英文关键词	Farmland abandonment Reforestation projects Karst ecosystem Greening Land use conversions
类型	Article
语种	英语
国家	Peoples R China ; Denmark
收录类别	SCI-E ; SSCI
WOS记录号	WOS:000531122000001
WOS关键词	LAND-COVER CHANGE ; ROCKY DESERTIFICATION ; FOREST TRANSITIONS ; VEGETATION ; DYNAMICS ; IMPACTS ; REGIONS ; CARBON ; COUNTY
WOS类目	Ecology ; Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向	Environmental Sciences & Ecology ; Physical Geography ; Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/319070
作者单位	1.Chinese Acad Sci, Inst Subtrop Agr, Key Lab Agroecol Proc Subtrop Reg, Changsha 410125, Peoples R China; 2.Chinese Acad Sci, Huanjiang Observat & Res Stn Karst Ecosyst, Huanjiang 547100, Hechi, Peoples R China; 3.Nanning Normal Univ, Minist Educ, Key Lab Environm Change & Resources Use Beibu Gul, Nanning 530001, Guangxi, Peoples R China; 4.Univ Copenhagen, Dept Geosci & Nat Resource Management, DK-1350 Copenhagen, Denmark; 5.Inst Natl Forestry & Grassland Adm China, Cent South Inventory & Planning, Changsha 410014, Peoples R China
推荐引用方式 GB/T 7714	Yue, Yuemin,Liao, Chujie,Tong, Xiaowei,et al. Large scale reforestation of farmlands on sloping hills in South China karst[J],2020,35(6):1445-1458.
APA	Yue, Yuemin.,Liao, Chujie.,Tong, Xiaowei.,Wu, Zhaobai.,Fensholt, Rasmus.,...&Brandt, Martin.(2020).Large scale reforestation of farmlands on sloping hills in South China karst.LANDSCAPE ECOLOGY,35(6),1445-1458.
MLA	Yue, Yuemin,et al."Large scale reforestation of farmlands on sloping hills in South China karst".LANDSCAPE ECOLOGY 35.6(2020):1445-1458.