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首页> 外文期刊>Biotropia: the Southeast Asian journal of tropical biology >LANDSAT ANALYSIS OF INVASIVE ALIEN SPECIES Acacia Nilotica DISTRIBUTION IN BALURAN NATIONAL PARK, INDONESIA
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LANDSAT ANALYSIS OF INVASIVE ALIEN SPECIES Acacia Nilotica DISTRIBUTION IN BALURAN NATIONAL PARK, INDONESIA

机译：印度尼西亚巴鲁兰国家公园外来入侵种金合欢分布的LANDSAT分析

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A cacia nilotica introduced to Baluran National Park in the late 1960sto create fire breaks to prevent fire spread from Baluran Savanna to the adjacent teak forest. However, A. nilotica has spread rapidly and is threatening the existence of Baluran Savanna as it has been observed to cause changes the ecosystem from open savannas to a closed canopy of A. nilotica in some areas. This study is one of a few that examines Acacia nilotica invasion in Baluran National Park through remote sensing. Land cover dynamics were quantified by Landsat multitemporal images using a supervised classification algorithm. Results shows that savanna and Acacia nilotica can be recognized using the composite bands 6, 5 and 3 of the Landsat 8 image. Fourteen years later Acacia nilotica has spread far north and south from its original introduction location, invading not only savannas but also dry forests in the Baluran National Park areas. The savanna size has decreased by 1,361 ha, mean while, Acacia nilotica stand increase by 1,886 ha. Spatial distribution of Acacia nilotica in Baluran National Park shows a clumped pattern. Acacia nilotica which develops in to a homogeneous stand in the north-west and eastern parts of the national park occupied an area of 3,628 ha or about 14.5% of the total area of there. This study has demonstrated the use of remote sensing technology to estimate the patterns of distribution and amount of Acacia nilotica cover over the whole Baluran National Park. This is one of the advantages of remote sensing and GIS, where the conventional approach of vegetation analysis is difficult and expensive to make such calculations directly in the field.
机译：1960年代末引入到Baluran国家公园的一株洋槐树会造成火灾，以防止火灾从Baluran Savanna蔓延到附近的柚木林。但是，尼罗罗非鱼已经迅速传播，并威胁到Baluran Savanna的存在，因为已观察到它会导致某些地区的生态系统从开放的稀树草原变为封闭的尼罗罗非鱼冠层。这项研究是通过遥感技术研究了相思在Baluran国家公园中入侵的少数几个研究之一。使用监督分类算法，通过Landsat多时相图像对土地覆盖动态进行量化。结果表明，使用Landsat 8图像的合成条带6、5和3可以识别稀树草原和刺槐。十四年后，相思树已经从最初的引入位置向北和向南扩散，不仅入侵热带稀树草原，还入侵了Baluran国家公园地区的干旱森林。大草原面积减少了1,361公顷，而刺槐相思木则增加了1,886公顷。 Baluran国家公园中相思树的空间分布呈团块状。在国家公园西北和东部发展成均匀林分的刺槐占地3,628公顷，约占该地区总面积的14.5％。这项研究证明了使用遥感技术估算整个Baluran国家公园中相思树的分布格局和覆盖量。这是遥感和GIS的优势之一，在传统的植被分析方法中，直接在野外进行此类计算既困难又昂贵。

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