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马达加斯加东部雨林的森林砍伐历史从卫星图像

G M Green, R W Sussman

Science (New York, N.Y.)

|April 13, 1990

概括

马达加斯加马达加斯加马达加斯加

科学领域:

生态生态学生态生态学
环境科学环境科学
保护生物学保护生物学

背景情况:

马达加斯加拥有非凡的生物多样性,但其独特的动植物面临严重的灭绝威胁.
马达加斯加东部的雨林是特有物种的重要息地.

研究的目的:

为了量化马达加斯加东部热带雨林的范围.
在35年的时间里 (1950-1985年) 监测森林砍伐速度.
为了确定导致森林丧失的因素.

主要方法:

利用卫星图像和来自空中照片的植被地图.
分析了1950年至1985年间雨林面积的变化.
与地形特征和人口密度相关的森林砍伐模式.

主要成果:

雨林面积从1950年的760万公减少到1985年的380万公.
森林砍伐平均每年达到111,000公.
快速的森林砍伐发生在人口密度高的低浮带地区.

结论:

马达加斯加的热带雨林经历了剧烈的减少,到1985年失去1950年的一半的面积.
持续的森林砍伐以目前的速度威胁到剩余的森林,只留下的斜坡是可行的.
需要紧急的保护干预,以保护马达加斯加的生物多样性热点.

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