Forest Cover Change and the Effectiveness of Protected Areas in the Himalaya since 1998
作者： Changjun Gu , Pei Zhao , Qiong Chen , Shicheng Li , Lanhui Li
DOI: 10.3390/SU12156123
关键词:
摘要: Himalaya, a global biodiversity hotspot, has undergone considerable forest cover fluctuation in recent decades, and numerous protected areas (PAs) have been established to prohibit degradation there. However, the spatiotemporal characteristics of this change across whole region are still unknown, as effectiveness its PAs. Therefore, here, we first mapped Himalaya 1998, 2008, 2018 with high accuracy (>90%) using random (RF) algorithm based on Google Earth Engine (GEE) platform. The propensity score matching (PSM) method was applied eight control variables balance heterogeneity land inside outside PAs quantified matched samples. results showed that increased by 4983.65 km2 from 1998 but decreased 4732.71 2008 2018. Further analysis revealed deforestation reforestation mainly occurred at edge tracts, over 55% occurring below 2000 m elevation. Forest changes were analyzed; these indicated about 56% had decreasing trend 2018, including Torsa (Ia PA), an area representative most natural conditions, which is strictly protected. Even so, whole, played positive role halting deforestation.
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