Arid
DOI10.1016/j.actao.2017.09.011
Identification of the key ecological factors influencing vegetation degradation in semi-arid agro-pastoral ecotone considering spatial scales
Peng, Yu; Wang, Qinghui; Fan, Min
通讯作者Peng, Yu
来源期刊ACTA OECOLOGICA-INTERNATIONAL JOURNAL OF ECOLOGY
ISSN1146-609X
EISSN1873-6238
出版年2017
卷号85页码:62-68
英文摘要

When assessing re-vegetation project performance and optimizing land management, identification of the key ecological factors inducing vegetation degradation has crucial implications. Rainfall, temperature, elevation, slope, aspect, land use type, and human disturbance are ecological factors affecting the status of vegetation index. However, at different spatial scales, the key factors may vary. Using Helin County, Inner-Mongolia, China as the study site and combining remote sensing image interpretation, field surveying, and mathematical methods, this study assesses key ecological factors affecting vegetation degradation under different spatial scales in a semi-arid agro-pastoral ecotone. It indicates that the key factors are different at various spatial scales. Elevation, rainfall, and temperature are identified as crucial for all spatial extents. Elevation, rainfall and human disturbance are key factors for small-scale quadrats of 300 m x 300 m and 600 m x 600 m, temperature and land use type are key factors for a medium-scale quadrat of 1 km x 1 km, and rainfall, temperature, and land use are key factors for large-scale quadrats of 2 km x 2 km and 5 km x 5 km. For this region, human disturbance is not the key factor for vegetation degradation across spatial scales. It is necessary to consider spatial scale for the identification of key factors determining vegetation characteristics. The eco-restoration programs at various spatial scales should identify key influencing factors according their scales so as to take effective measurements. The new understanding obtained in this study may help to explore the forces which driving vegetation degradation in the degraded regions in the world. (C) 2017 Elsevier Masson SAS. All rights reserved.


英文关键词Vegetation index Ecological factor Correlation analysis Spatial scale effect Semi-arid area Ecotone
类型Article
语种英语
国家Peoples R China
收录类别SCI-E
WOS记录号WOS:000418979900008
WOS关键词INDUCED DRYLAND DEGRADATION ; NDVI TIME-SERIES ; LAND DEGRADATION ; TREND ANALYSIS ; COVER ; CHINA ; INDEX ; DYNAMICS ; CLIMATE ; RIVER
WOS类目Ecology
WOS研究方向Environmental Sciences & Ecology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/196981
作者单位Minzu Univ China, Coll Life & Environm Sci, Beijing 100081, Peoples R China
推荐引用方式
GB/T 7714
Peng, Yu,Wang, Qinghui,Fan, Min. Identification of the key ecological factors influencing vegetation degradation in semi-arid agro-pastoral ecotone considering spatial scales[J],2017,85:62-68.
APA Peng, Yu,Wang, Qinghui,&Fan, Min.(2017).Identification of the key ecological factors influencing vegetation degradation in semi-arid agro-pastoral ecotone considering spatial scales.ACTA OECOLOGICA-INTERNATIONAL JOURNAL OF ECOLOGY,85,62-68.
MLA Peng, Yu,et al."Identification of the key ecological factors influencing vegetation degradation in semi-arid agro-pastoral ecotone considering spatial scales".ACTA OECOLOGICA-INTERNATIONAL JOURNAL OF ECOLOGY 85(2017):62-68.
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