基于Landsat的生态系统格局及其变化评估研究——以吉林省西部地区为例
Evaluation of Ecosystem Pattern and Changes Based on Landsat——A Case Study of Western Jilin Province
孟彩红 1王媛 1苏伟 1金玉哲 2李东秋 1李景新 1周美杉1
作者信息
- 1. 吉林环境科学研究院,吉林 长春 130012
- 2. 吉林省生态环境监测中心,吉林 长春 130011
- 折叠
摘要
基于2000-2020年的3期Landsat TM/OLI影像,分析了西部地区生态系统格局及其变化情况.结果表明:通过对2000-2020年吉林省西部地区生态系统类型的分布与构成、面积变化率、转换特征的统计分析,系统地掌握了其格局状况及变化特征.评估得到:2000-2010年生态格局指标变化只有乾安县(0.85)为正向变化,上升幅度为1.71％;其余县域均为负向变化,生态格局指数减少最少为宁江区(4.27),下降幅度为8.95％.2010-2020年生态格局指标变化只有建成区的宁江区(0.07)和洮北区(0.42)为正向变化,上升幅度分别为0.15％、1.09％,其余的县域生态格局指标都减少,减少最少的为洮南市(1.82),减少幅度为3.91％.2000-2020年生态格局指标只有乾安县(0.33)为增多,增加幅度为0.67％;其余县域生态格局指标都减少,减少最少的为镇赉县(4.87),上升幅度为7.91％.生态格局为社会经济发展宏观决策和生态文明建设提供有力支撑,为维护西部地区生态安全提供科学决策依据.
Abstract
Based on three Landsat TM/OLI images from 2000 to 2020,the ecosystem pattern and changes in the western region are analyzed.The results indicate that through statistical analysis of the distribution and composi-tion,area change rate,and transformation characteristics of ecosystem types in the western region of Jilin Province from 2000 to 2020,the pattern status and change characteristics were systematically grasped.The evaluation shows that only Qian'an County(0.85)showed a positive change in ecological pattern indicators between 2000 and 2010,with an increase of 1.71％;The other counties have negative changes,and the ecological pattern index has de-creased the least in Ningjiang District(4.27),with a decrease of 8.95％.From 2010 to 2020,the changes in ecolog-ical pattern indicators were only positive in the built-up areas of Ningjiang District(0.07)and Taobei District(0.42),with an increase of 0.15％and 1.09％,respectively.The remaining county ecological pattern indicators de-creased,with Taonan City(1.82)showing the least decrease,with a decrease of 3.91％.From 2000 to 2020,only Qian'an County(0.33)showed an increase in ecological pattern indicators,with an increase rate of 0.67％;The ec-ological pattern indicators of other counties have decreased,with Zhenlai County(4.87)showing the least de-crease,with an increase of 7.91％.The ecological pattern provides strong support for macroeconomic decision-making and ecological civilization construction in social and economic development,and provides scientific deci-sion-making basis for maintaining ecological security in the western region.
关键词
西部地区/遥感影像/生态系统格局/生态系统转换Key words
western region/remote sensing image/ecosystem pattern/ecosystem transformation引用本文复制引用
基金项目
科技可行性项目(吉环院字[2022]2号)
出版年
2024
NETL
NSTL
万方数据