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首页> 外文会议>International Symposium on Remote Sensing of Environment >Landsat-based land cover time series from the early 1970s to 2003: comparing three East African rainforest areas in support of biodiversity research
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Landsat-based land cover time series from the early 1970s to 2003: comparing three East African rainforest areas in support of biodiversity research

机译：基于陆地卫星的土地覆盖时间序列，从1970年代初到2003年：比较三个东非雨林地区，以支持生物多样性研究

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Three East African forest areas are investigated, each having experienced different fragmentation and disturbance histories: Kakamega Forest in western Kenya as well as Mabira Forest and Budongo Forest in Uganda. Landsat imagery (for eight or seven time steps) is pre-processed and multispectrally classified following the same methodology, thus allowing for a true comparison. 9 of 12 land cover classes distinguished for Kakamega Forest could also be realised for Mabira Forest. The remaining three classes, of which two are forest plantations, are not found in the Mabira Forest area. Comparative analyses of the classification results reveal characteristic differences. Whereas Kakamega Forest has experienced steady forest loss, the Mabira Forest time series data show a tremendous loss in the late 1970s / early 1980s. In both forests exotic, but different secondary bushland species are found from the early 1990s onwards. The results are to form an important basis for extrapolating biological field findings in space and time.
机译：调查了三个东非森林地区，每个区域都有不同的破碎和干扰历史：肯尼亚西部的卡卡梅加森林以及乌干达的马比拉森林和布东戈森林。按照相同的方法对Landsat影像（八个或七个时间步长）进行预处理和多光谱分类，从而可以进行真正的比较。马比拉森林（Mabira Forest）也可以实现为卡卡梅加森林（Kakamega Forest）区分的12种土地覆盖类别中的9种。在马比拉森林地区没有找到其余的三个类别，其中两个是人工林。分类结果的比较分析揭示了特征差异。尽管Kakamega森林经历了稳定的森林砍伐，但马比拉森林的时间序列数据显示，在1970年代末/ 1980年代初，森林遭受了巨大损失。从1990年代初开始，在这两种森林中都发现了异国情调的但次生灌木丛的物种。这些结果将为推断生物学领域在时空上的发现提供重要的基础。

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