欢迎访问林草资源研究

林业资源管理 ›› 2022›› Issue (3): 73-80.doi: 10.13466/j.cnki.lyzygl.2022.03.012

• 科学研究 • 上一篇    下一篇

西双版纳天然林丧失时空变化及其景观生态响应

彭燕(), 史正涛(), 何丽, 沈润, 徐瑞, 陈越豪   

  1. 云南师范大学 地理学部,昆明 650500
  • 收稿日期:2022-03-28 修回日期:2022-04-21 出版日期:2022-06-28 发布日期:2022-08-04
  • 通讯作者: 史正涛
  • 作者简介:彭燕(1998-),女,云南西双版纳人(瑶族),在读硕士,研究方向为资源环境遥感。Email: 1444826975@qq.com
  • 基金资助:
    云南省水利厅水利科技项目“云南主要人工经济林对区域水资源安全的影响调查研究”(2014003)

Temporal and Spatial Changes of Natural Forest Loss in Xishuangbanna and its Landscape Ecological Response Based on Landsat Data

PENG Yan(), SHI Zhengtao(), HE Li, SHEN Run, XU Rui, CHEN Yuehao   

  1. Faculty of Geography,Yunnan Normal University,Kunming 650500,China
  • Received:2022-03-28 Revised:2022-04-21 Online:2022-06-28 Published:2022-08-04
  • Contact: SHI Zhengtao

摘要:

基于Landsat影像,采用随机森林方法提取了1990—2019年西双版纳天然林,分析了天然林的时空变化特征及其对景观生态影响。结果表明:1)1990—2019年西双版纳天然林面积呈持续减少的趋势,30年共减少了369 601 hm2,减少的天然林主要转化为经济林和耕地;2)人类活动是西双版纳天然林丧失的主要影响因素,人口的激增和社会经济发展增加了农业用地的需求,从而加剧了天然林的丧失,其中勐腊县天然林丧失最为严重;3)西双版纳天然林丧失导致森林景观破碎化严重,生境质量下降,边缘效应显著。1990—2019年,天然林斑块数量增加了1 950个,平均斑块面积减少了1 996.55 hm2;景观形状指数从1990年的48.06增加到了2019年的82.79。

关键词: 天然林丧失, Landsat数据, 转移矩阵, 景观生态响应, 西双版纳

Abstract:

This paper extracted natural forest in Xishuangbanna in 1990 and 2019 using random forest method based on Landsat images.Meanwhile,the spatial-temporal variation characteristics and the impact on landscape ecology of natural forest losses in Xishuangbanna were analysed.The results showed that: 1) The area of natural forest in Xishuangbanna showed a variation tendency of continuous decrease from 1990 to 2019,with a decrease area of 369,601hm2,which was mainly converted into economic forest and cultivated land.2)Human activities were the main driving forces of natural forests losses in Xishuangbanna.The rapid population growth and the development of the social economy have increased the demand for agricultural land,thus exacerbating the loss of natural forests,and the loss of natural forests in Mengla County was the most serious.3)The loss of natural forest in Xishuangbanna resulted in severe forest landscape fragmentation,as well as the deterioration of habitat quality and significant edge effect.From 1990 to 2019,the number of natural forest patches increased by 1 950,and the average patch area decreased by 1 996.55 hm2.The landscape shape index increased from 48.06 in 1990 to 82.79 in 2019.

Key words: natural forest loss, landsat data, transfer matrix, landscape ecological response, Xishuangbanna

中图分类号: