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首页> 外文期刊>Regional Environmental Change >Land cover dynamics in the Simien Mountains (Ethiopia), half a century after establishment of the National Park
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Land cover dynamics in the Simien Mountains (Ethiopia), half a century after establishment of the National Park

机译：国家公园建立后半个世纪，塞米恩山脉（埃塞俄比亚）的土地覆盖动态

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摘要

The Simien Mountains house several endangered and endemic wildlife species and provide important ecosystem services. Despite its regional environmental importance, the Simien Mountains are listed as World Heritage in Danger since 1997. This raised the need for an evaluation of landscape changes from before the establishment of the Simien Mountain National Park (SMNP) in 1969. For this purpose, historical terrestrial photographs (1966-2009) were re-analyzed from 2014 repeats, using an expert rating system with eight correspondents. An increase in forest was observed in the eastern and western edge of the SMNP at Sankaber and Imet Gogo (20-40%). In contrast, centrally in the SMNP (around Gich), the area covered with dense forest decreased with an estimated rate of -1.4% per decade. There is no significant effect (p > 0.05) of the boundary of the SMNP on woody vegetation change, because of continued anthropogenic pressure (especially wood cutting and livestock grazing) inside the SMNP. Also elevation and distance to scout camps do not affect rates of change, and however, the density of houses within 2.2 km (a proxy of population pressure) is able to explain 32% of the spatial distribution of woody vegetation decrease (p < 0.05). A subset of six repeated photographs, indicated an uplift of the treeline by more than 1 m year(-1), in areas with low anthropogenic pressure. This is potentially related to increasing (average annual) temperature warming of up to 1.5 degrees C over the past 50 years. Overall, further reduction in anthropogenic pressure is urgent and crucial for recovery of the afro-alpine vegetation and the interrelated endangered wildlife in the Simien Mountains.
机译：四面山拥有数种濒危和特有的野生动植物，并提供重要的生态系统服务。尽管其在区域环境中的重要性，但自1997年以来，西门山被列为世界濒危世界遗产。从1969年建立西门山国家公园（SMNP）以来，就需要对景观变化进行评估。为此，历史使用具有八名记者的专家评分系统，对2014年重复拍摄的地面照片（1966-2009年）进行了重新分析。在Sankaber和Imet Gogo的SMNP的东部和西部边缘发现了森林的增加（20-40％）。相反，在SMNP（吉奇附近）的中央，茂密的森林覆盖面积以每十年-1.4％的估计速度减少。由于SMNP内部持续的人为压力（尤其是砍伐木材和放牧牲畜），SMNP的边界对木质植被的变化没有显着影响（p> 0.05）。同样，海拔和到侦察兵营地的距离也不会影响变化率，但是，在2.2公里内的房屋密度（代表人口压力）能够解释32％的木质植被空间分布减少（p <0.05） 。六张重复照片的子集表明，在人为压力较低的地区，林线抬升了超过1 m年（-1）。这可能与过去50年中温度升高（平均每年）达到1.5摄氏度有关。总体而言，进一步减轻人为压力对于恢复西门山区的非洲高山植被和相关的濒危野生动植物至关重要，这是至关重要的。

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  • 来源
    《Regional Environmental Change》 |2017年第3期|777-787|共11页
  • 作者

    Jacob Miro; Frankl Amaury; Hurni Hans; Lanckriet Sil; De Ridder Maaike; Guyassa Etefa; Beeckman Hans; Nyssen Jan;

  • 作者单位

    Univ Ghent, Dept Geog, Krijgslaan 281 S8, B-9000 Ghent, Belgium;

    Univ Ghent, Dept Geog, Krijgslaan 281 S8, B-9000 Ghent, Belgium|Res Fund Flanders FWO, Egmontstr 5, B-1000 Brussels, Belgium;

    Univ Bern, Ctr Dev & Environm CDE, Hallerstr 10, CH-3012 Bern, Switzerland;

    Univ Ghent, Dept Geog, Krijgslaan 281 S8, B-9000 Ghent, Belgium;

    Royal Museum Cent Africa, Lab Wood Biol & Xylarium, Leuvensesteenweg 13, B-3080 Tervuren, Belgium;

    Univ Ghent, Dept Geog, Krijgslaan 281 S8, B-9000 Ghent, Belgium|Mekelle Univ, Dept Land Resource & Environm Protect, Mekelle, Ethiopia;

    Royal Museum Cent Africa, Lab Wood Biol & Xylarium, Leuvensesteenweg 13, B-3080 Tervuren, Belgium;

    Univ Ghent, Dept Geog, Krijgslaan 281 S8, B-9000 Ghent, Belgium;

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  • 正文语种 eng
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  • 关键词

    Vegetation change; Treeline dynamics; Anthropogenic pressure; Repeat photography;

    机译：植被变化;树木动态;人为压力;重复摄影;

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