Land Use and Cover Dynamics Since 1964 in the Afro‐Alpine Vegetation Belt: Lib Amba Mountain in North Ethiopia
Land Use and Cover Dynamics Since 1964 in the Afro‐Alpine Vegetation Belt: Lib Amba Mountain in North Ethiopia
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DOI：
10.1002/ldr.2396
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发表时间：
2016-04
影响因子：
4.7
通讯作者：
M. Jacob;Liên Romeyns;A. Frankl;T. Asfaha;H. Beeckman;J. Nyssen
中科院分区：
文献类型：
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作者：
M. Jacob;Liên Romeyns;A. Frankl;T. Asfaha;H. Beeckman;J. Nyssen
人类引起的土地利用和土地覆盖变化威胁着脆弱的热带非洲高山植被的生态系统服务。埃塞俄比亚高地有几项LUC变化研究，但对非洲阿尔卑斯山地区的LUC变化知之甚少。在这项研究中，绘制了1964年至2012年间埃塞俄比亚北部Abune Yosef山脉的Lib Amba山的非洲高山地带的LUC变化图。历史LUC是从1964年和1982年的地理参考航空照片中得出的，而现在的LUC(2012)则是从必应地图的卫星图像中得出的。基于这些连续的LUC图，计算了LUC的时间深度图、LUC比例、LUC转移矩阵和LUC变化轨迹。LUC变化的两个主要阶段可以与新博斯鲁里亚观点相联系。(I)1964至1982年间，在人口压力较小的时期，3500米以上的森林遭到大规模砍伐和植被普遍退化；(Ii)1982至2012年间，在人口压力增加的情况下，土地利用的加剧伴随着植被和杜鹃花林的轻微恢复。深度访谈表明，地方和政府的土地管理措施对于防止植被枯竭和土壤退化非常重要。Lib Amba上森林的迅速恢复使人们有信心，鉴于非洲高山植被剩余斑块的附近，退化的非洲高山地区将在短期内受益于完全保护。因此，管理干预对于恢复非洲高山植被带的重要生态系统服务至关重要。版权所有©2015 John Wiley&Sons，Ltd.
Human‐induced land use and land cover (LUC) changes threaten the ecosystem services of the vulnerable tropical afro‐alpine vegetation. Several LUC change studies are available for the Ethiopian highlands, but relatively little is known about LUC change in the afro‐alpine zones. In this study, LUC changes between 1964 and 2012 were mapped for the afro‐alpine zone of Lib Amba Mountain, part of the Abune Yosef Mountains in North Ethiopia. Historical LUC was derived from georeferenced aerial photographs of 1964 and 1982, and the present LUC (2012) from Bing Map satellite imagery. Based on these successive LUC maps a time‐depth map, LUC proportions, LUC transition matrices and LUC change trajectories were calculated. Two main phases of LUC change could be distinguished linked to the neo‐Boserupian perspective. (i) Between 1964 and 1982, there were large‐scale deforestation and general degradation of the vegetation above 3500 m, in a period of low population pressure; (ii) Between 1982 and 2012, an intensification of land use prevailed accompanied with a slight regeneration of the vegetation and the Erica arborea L. forest, under increased population pressure. Depth interviews indicated that local and governmental land management measures are very important for the protection against vegetation depletion and soil degradation. Quick recovery of the forest on Lib Amba provides confidence that degraded afro‐alpine areas would benefit in a short time from complete protection, given the vicinity of remaining patches of afro‐alpine vegetation. Management interventions are thus vital to restore the important ecosystem services of the afro‐alpine vegetation belt. Copyright © 2015 John Wiley & Sons, Ltd.