在不断变化的种植景观中,植被干扰和再生动态
Yamini Bhat1, Subrata Nandy2, Krishna Das1
1Indian Institute of Remote Sensing, Indian Space Research Organisation, Department of Space, Government of India, Dehradun, 248001, India.
Scientific reports
|November 16, 2024
概括
特里普拉的转移耕作显示出不断变化的模式,转向永久农业和更短的休期. 这影响了森林覆盖和传统做法,迫使种植者更频繁地返回姆地块.
科学领域:
- 环境科学 环境科学
- 遥感 遥感 遥感 遥感
- 农业科学 农业科学
背景情况:
- 转移耕作是东南亚森林覆盖面变化的重要驱动因素,具有重大环境和社会经济后果.
- 了解植被干扰和再生的动态对于可持续的土地管理至关重要.
研究的目的:
- 评估1991年至2020年印度特里普拉邦转移种植造成的植被干扰和再生的时空模式.
- 分析转移式种植实践的变化及其对土地利用和土地覆盖的影响.
主要方法:
- 利用Landsat的时间序列数据和LandTrendr的时间细分来分析植被干扰和再生.
- 采用正常化的燃烧比趋势和TimeSync工具进行验证.
- 使用随机森林分类器绘制了六个土地使用/土地覆盖类别,准确度为83.08%.
主要成果:
- 分析显示了不同程度的干扰:2533.96平方公里不受干扰,568.43平方公里低,1501.11平方公里中等,和184.82平方公里高干扰.
- 鉴定了由商业作物激励推动的从传统转移耕作转向更永久的农业实践的趋势.
- 由于单一种植的扩张减少了可用的面积,观察到重新访问jhum补丁的频率增加.
结论:
- 特里普拉的转移式种植模式正在演变,显著转向长期种植商用作物.
- 单一种植的扩张和转移的种植周期中较短的休息期对传统做法和森林生态系统构成挑战.
- 这项研究为印度环境中转移种植的变化动态提供了新的见解.
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