Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/j.jaridenv.2012.10.006 |
Woody vegetation dynamics in the rangelands of lower Omo region, southwestern Ethiopia | |
Belay, T. A.1,2; Totland, O.1; Moe, S. R.1 | |
通讯作者 | Belay, T. A. |
来源期刊 | JOURNAL OF ARID ENVIRONMENTS |
ISSN | 0140-1963 |
出版年 | 2013 |
卷号 | 89页码:94-102 |
英文摘要 | Woody encroachment is one of the several factors aggravating rangeland degradation in arid and semiarid areas. The goal of this study is to improve our understanding about the relationship between woody encroachment and its potential drivers by analyzing the temporal and spatial pattern of land-cover changes in the lower Omo region of southern Ethiopia. We used a combination of multi-temporal images, as well as climatic and demographic data for the analysis. Between 1985 and 2010 woody vegetation cover increased by 30.6% in the pastoral landuse type, while declining by 4.4% in the semi-pastoral areas. The increment was negatively associated with altitude and browser livestock density. However, contrary to the traditional presumption, it was not associated with grazer livestock density. Moreover, woody encroachment was higher in remote sites, farther from rivers and towns, where there is relatively lower human activities and livestock disturbance. The finding suggests the ecological significance of landuse type and livestock browsing to regulate the dynamics of woody vegetation in disturbance-adapted rangelands. Thus, a careful introduction of native larger browsers into woody encroached pastoral areas may help to facilitate rapid ecosystem recovery. (C) 2012 Elsevier Ltd. All rights reserved. |
英文关键词 | Animal mobility Arid and semiarid rangeland Bush encroachment Image classification Non-equilibrium Rainfall variability |
类型 | Article |
语种 | 英语 |
国家 | Norway ; Ethiopia |
收录类别 | SCI-E |
WOS记录号 | WOS:000312522000013 |
WOS关键词 | SOUTH-AFRICAN SAVANNA ; TREE-GRASS COEXISTENCE ; SHRUB ENCROACHMENT ; LAND-USE ; MEDITERRANEAN GRASSLANDS ; BUSH ENCROACHMENT ; LARGE HERBIVORES ; ECOSYSTEMS ; WOODLAND ; IMPACT |
WOS类目 | Ecology ; Environmental Sciences |
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/2XILL650/178013 |
作者单位 | 1.Norwegian Univ Life Sci, Dept Ecol & Nat Resource Management, NO-1432 As, Norway; 2.Hawassa Univ, Hawassa, Ethiopia |
推荐引用方式 GB/T 7714 | Belay, T. A.,Totland, O.,Moe, S. R.. Woody vegetation dynamics in the rangelands of lower Omo region, southwestern Ethiopia[J],2013,89:94-102. |
APA | Belay, T. A.,Totland, O.,&Moe, S. R..(2013).Woody vegetation dynamics in the rangelands of lower Omo region, southwestern Ethiopia.JOURNAL OF ARID ENVIRONMENTS,89,94-102. |
MLA | Belay, T. A.,et al."Woody vegetation dynamics in the rangelands of lower Omo region, southwestern Ethiopia".JOURNAL OF ARID ENVIRONMENTS 89(2013):94-102. |
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