评估因1992年至2023年土地使用变化的森林碎片化:利用遥感数据进行时空分析
Khadim Hussain1, Kaleem Mehmood2,3, Shoaib Ahmad Anees4,5
1State Forestry and Grassland Administration Key Laboratory of Forest Resources and Environmental Management, Beijing Forestry University, Beijing, 100083, China.
Heliyon
|August 16, 2024
概括
城市发展正在使巴基斯坦的森林覆盖面减少150多平方公里,并增加了森林碎片化. 这凸显了迫切需要保护战略和有效的土地管理,以保护重要的生态系统.
科学领域:
- 环境科学,遥感,地理信息系统,景观生态学,土地利用变化
背景情况:
- 城市发展和农业扩张对生态敏感地区的土地利用和土地覆盖 (LULC) 动态施加了重大压力.
- 巴基斯坦拉瓦尔宾迪地区的Murree和Kotli Sattian地区面临着严重的LULC变化,影响森林生态系统.
研究的目的:
- 在Murree和Kotli Sattian tehsils中评估LULC在三十年 (1992-2023) 的空间变化和时间动态.
- 用专门的景观分析工具分析森林碎片化模式及其演变.
- 为保护战略和土地管理政策提供见解,以应对环境变化.
主要方法:
- 使用Landsat 5和Landsat 9卫星图像进行远程传感数据.
- 使用的支持矢量机 (SVM) 分类器和ArcGIS用于图像处理和LULC分类.
- 应用交叉表格用于LULC变化检测和景观碎片化工具 (LFTv2.0) 用于森林碎片化分析.
主要成果:
- 森林覆盖面显著减少:针叶森林减少了72.4平方公里 (45.0%至36.0%),常青森林减少了78.1平方公里 (22.0%至12.3%).
- 森林碎片化增加:大型核心森林面积从20.3%减少到7.2%,而补丁森林面积从2.4%增加到5.9%.
- 过渡矩阵和桑基图可视化了LULC类之间的动态转移,表明了大量的土地使用变化.
结论:
- 该研究揭示了森林覆盖面的严重下降以及研究区域森林碎片化的显著增加.
- 调查结果强调,迫切需要强有力的保护战略和有效的土地管理实践,以减轻负面影响.
- 这项研究为巴基斯坦喜马拉雅地区的未来土地管理和政策制定提供了必要的数据,因为环境正在迅速变化.
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