| DOI: | 10.1016/j.gloplacha.2014.07.007
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| 论文题名: | Hotspots of human-induced biomass productivity decline and their social-ecological types toward supporting national policy and local studies on combating land degradation |
| 作者: | Vu Q.M.; Le Q.B.; Vlek P.L.G.
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| ISSN: | 0921-8513
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| 出版年: | 2014
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| 卷: | 121 | | 起始页码: | 64
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| 结束页码: | 77
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| 语种: | 英语
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| 英文关键词: | Land degradation
; National scale
; NDVI
; Net primary productivity
; Socio-ecological hotspot
; Spatio-temporal analysis
; Vietnam
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| Scopus关键词: | Cluster analysis
; Ecosystems
; Nutrients
; Productivity
; Hot spot
; Land degradation
; National scale
; NDVI
; Net primary productivity
; Spatiotemporal analysis
; Viet Nam
; Biomass
; anthropogenic effect
; biomass
; land degradation
; national planning
; NDVI
; net primary production
; soil nutrient
; spatiotemporal analysis
; time series
; Mekong Delta
; Tay Nguyen
; Viet Nam
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| 英文摘要: | Identification and social-ecological characterization of areas that experience high levels of persistent productivity decline are essential for planning appropriate management measures. Although land degradation is mainly induced by human actions, the phenomenon is concurrently influenced by global climate changes that need to be taken into account in land degradation assessments. This study aims to delineate the geographic hotspots of human-induced land degradation in the country and classify the social-ecological characterizations of each specific degradation hotspot type. The research entailed a long-term time-series (1982-2006) of Normalized Difference Vegetation Index to specify the extents of areas with significant biomass decline or increase in Vietnam. Annual rainfall and temperature time-series were then used to separate areas of human-induced biomass productivity decline from those driven by climate dynamics. Next, spatial cluster analyses identified social-ecological types of degradation for guiding further investigations at regional and local scales. The results show that about 19% of the national land mass experienced persistent declines in biomass productivity over the last 25years. Most of the degraded areas are found in the Southeast and Mekong River Delta (17,984km2), Northwest Mountains (14,336km2), and Central Highlands (13,504km2). We identified six and five social-ecological types of degradation hotspots in agricultural and forested zones, respectively. Constraints in soil nutrient availability and nutrient retention capability are widely spreading in all degradation hotspot types. These hotspot types are different from each other in social and ecological conditions, suggesting that region-specific strategies are needed for the formulation of land degradation combating policy. © 2014 Elsevier B.V. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84905389617&doi=10.1016%2fj.gloplacha.2014.07.007&partnerID=40&md5=0f19192ad117ac2fcd69cf4c46a3f852
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| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/11419
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| Appears in Collections: | 全球变化的国际研究计划
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作者单位: | Natural and Social Science Interface (NSSI), Institute for Environmental Decisions (IED), Swiss Federal Institute of Technology Zurich, CH-8092 Zurich, Switzerland
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| Recommended Citation: | |
Vu Q.M.,Le Q.B.,Vlek P.L.G.. Hotspots of human-induced biomass productivity decline and their social-ecological types toward supporting national policy and local studies on combating land degradation[J],2014-01-01,121.
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