DEFORESTATION HISTORY OF THE EASTERN RAIN FORESTS OF MADAGASCAR FROM SATELLITE IMAGES
DEFORESTATION HISTORY OF THE EASTERN RAIN FORESTS OF MADAGASCAR FROM SATELLITE IMAGES
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DOI：
10.1126/science.248.4952.212
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发表时间：
1990-04-13
期刊：
影响因子：
56.9
通讯作者：
SUSSMAN, RW
中科院分区：
文献类型：
--
作者：
GREEN, GM;SUSSMAN, RW
马达加斯加是地球上生物资源最丰富的地区之一，其动植物也是最濒危的地区之一。卫星图像和基于早期航空照片的植被地图被用来确定马达加斯加东部热带雨林的范围，并监测35年期间的森林砍伐率。1985年，仍有380万公顷的降雨，只占1950年760万公顷的50%，只占估计原始范围(1120万公顷)34%的34%。1950至1985年间，森林砍伐速度平均为每年111,000公顷。在地形起伏低、人口密度高的地区，森林砍伐速度最快。如果森林砍伐继续以同样的速度进行，那么在接下来的35年里，只有最陡峭的斜坡上的森林才能幸存下来。
Madagascar is biologically one of the richest areas on Earth, and its plants and animals are among the most endangered. Satellite images and vegetation maps based on earlier aerial photographs were used to determine the extent of eastern rain forests in Madagascar and to monitor the rate of deforestation over a 35-year period. In 1985, 3.8 million hectares of rain forst remained, representing only 50 percent of the 7.6 million hectares existing in 1950 and 34 percent of the 34 percent ofthe estimated original extent (11.2 million hectares). Between 1950 and 1985, the rate of deforestation averaged 111,000 hectares per year. Deforestation was most rapid in areas with low topographic relief and high population density. If cutting of forests continues at the same pace, only forests on the steepest slopes will survive the next 35 years.