Fifty years of deforestation and forest fragmentation in Madagascar
Fifty years of deforestation and forest fragmentation in Madagascar
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DOI：
10.1017/s0376892907004262
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发表时间：
2007-12-01
影响因子：
2.7
通讯作者：
Hawkins, Frank
中科院分区：
文献类型：
--
作者：
Harper, Grady J.;Steininger, Marc K.;Hawkins, Frank
热带森林砍伐是造成物种灭绝和气候变化的一个关键因素，但人们对热带森林的范围及其因破碎化而遭到破坏和退化的速度仍然知之甚少。马达加斯加的森林是世界上生物最丰富和最独特的森林之一，尽管人们长期以来一直担心森林遭到破坏，但过去对森林覆盖率和森林砍伐的估计差异很大。航空照片分析（C）1953）和Landsat图像（c. 1973年，c. 1990年，C。2000年）表明，从20世纪50年代到2000年，森林覆盖率下降了近40%。2000年，“核心森林”从非森林边缘减少了近80%。这种森林破坏和退化威胁着数以千计的物种灭绝。高分辨率的经验证的森林覆盖率和毁林数据覆盖全国，能够准确监测生境范围和破碎化趋势，这对评估物种养护状况至关重要。
Tropical deforestation is a key contributor to species extinction and climate change, yet the extent of tropical forests and their rate of destruction and degradation through fragmentation remain poorly known. Madagascar's forests are among the most biologically rich and unique in the world but, in spite of longstanding concern about their destruction, past estimates of forest cover and deforestation have varied widely. Analysis of aerial photographs (c. 1953) and Landsat images (c. 1973, c. 1990 and c. 2000) indicates that forest cover decreased by almost 40% from the 1950s to c. 2000, with a reduction in 'core forest' > 1 km from a non-forest edge of almost 80%. This forest destruction and degradation threaten thousands of species with extinction. Country-wide coverage of high-resolution validated forest cover and deforestation data enables the precise monitoring of trends in habitat extent and fragmentation critical for assessment of species' conservation status.