Mapping the World's Intact Forest Landscapes by Remote Sensing
Mapping the World's Intact Forest Landscapes by Remote Sensing
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DOI：
10.5751/es-02670-130251
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发表时间：
2008-12-01
影响因子：
4.1
通讯作者：
Zhuravleva, Ilona
中科院分区：
文献类型：
--
作者：
Potapov, Peter;Yaroshenko, Aleksey;Zhuravleva, Ilona
保护大型天然林景观是一项非常重要的任务，有助于实现保护森林生物多样性的各种国际战略倡议，减少森林砍伐和森林退化造成的碳排放，并促进可持续森林管理实践。本文介绍了一种绘制大型完整森林景观（IFL）的新方法，IFL被定义为当前森林范围内的一片完整的自然生态系统，没有重大人类活动的迹象，面积至少为500公里。我们利用现有的精细比例尺地图和覆盖全球的高空间分辨率卫星图像创建了全球IFL地图。我们估计，目前森林生态系统（林区）范围内的IFL全球面积为1310万km（2）或林区的23.5%。绝大多数IFL存在于两个生物群落中：密集的热带和亚热带森林（45.3%）和北方森林（43.8%）。温带阔叶林和混交林中的IFL比例最低。在共同组成森林区的149个国家中，有66个国家有森林联盟。其中三个国家-加拿大，俄罗斯和巴西-占IFL总面积的63.8%。在世界IFL面积中，18.9%有某种形式的保护，但只有9.7%受到严格保护，即，属于IUCN I-III类保护区。这里介绍的世界IFL地图旨在支持在全球和区域范围内制定自然保护总体战略。它还确定了监测森林砍伐和森林退化的基线，非常适合与具有成本效益的业务卫星数据一起使用。所有项目成果和IFL地图都可在一个专门的网站（http：//www.example.com）上查阅。www.intactforests.org
Protection of large natural forest landscapes is a highly important task to help fulfill different international strategic initiatives to protect forest biodiversity, to reduce carbon emissions from deforestation and forest degradation, and to stimulate sustainable forest management practices. This paper introduces a new approach for mapping large intact forest landscapes (IFL), defined as an unbroken expanse of natural ecosystems within areas of current forest extent, without signs of significant human activity, and having an area of at least 500 km(2). We have created a global IFL map using existing fine-scale maps and a global coverage of high spatial resolution satellite imagery. We estimate the global area of IFL within the current extent of forest ecosystems ( forest zone) to be 13.1 million km(2) or 23.5% of the forest zone. The vast majority of IFL are found in two biomes: Dense Tropical and Subtropical Forests (45.3%) and Boreal Forests (43.8%). The lowest proportion of IFL is found in Temperate Broadleaf and Mixed Forests. The IFL exist in 66 of the 149 countries that together make up the forest zone. Three of them-Canada, Russia, and Brazil-contain 63.8% of the total IFL area. Of the world's IFL area, 18.9% has some form of protection, but only 9.7% is strictly protected, i.e., belongs to IUCN protected areas categories I-III. The world IFL map presented here is intended to underpin the development of a general strategy for nature conservation at the global and regional scales. It also defines a baseline for monitoring deforestation and forest degradation that is well suited for use with operational and cost-effective satellite data. All project results and IFL maps are available on a dedicated web site (http://www.intactforests.org).