艾比湖流域草地生态系统环境健康遥感诊断

doi:10.11686/cyxb2019542

摘要/Abstract

摘要： 为了能更好地了解艾比湖流域草地生态系统的健康状况,本研究以MODIS与Landsat数据为本底,引入信息熵分析艾比湖流域2001-2017年草地生态系统健康变化趋势,选用压力-状态-响应(pressure-state-response,PSR)模型评价2017年草地的健康现状,结合流域草地生态系统生态环境健康变化趋势和现状,完成草地生态系统环境健康诊断。结果表明:1)2001-2017年艾比湖流域草地生态系统环境健康变化趋势为变好、基本不变、变差的区域分别占总草地面积的29.5%,59.4%和11.1%,呈现“稳中向好”的特点。2)2017年草地生态系统生态环境健康指数的范围为0.1097~0.3892,整体健康水平不高,需要加强对草地资源的保护管理。3)根据艾比湖流域草地生态系统综合治理建议图,治理区占总草地面积的39.1%,主要分布在山前草地和荒漠草地;保护区占总草地面积的34.2%,分布在部分山前草地;预防区占总草地面积的26.7%,主要在城镇较为集中的区域。

关键词: 草地生态系统, 信息熵, PSR模型, 健康诊断

Abstract: This study analyzed the changes in grassland ecosystem health from 2001 to 2017 in the Ebinur Lake Basin. The research was based on MODIS and Landsat data, and used information entropy principles and a pressure-state-response (PSR) model to evaluate the health status of grassland in the Ebinur Lake Basin in 2017, based on the change trends and current data. It was found that: 1) From 2001 to 2017, the proportions of land area in the Ebinur Lake Basin for which environmental health of the grassland ecosystem has improved, remained unchanged or deteriorated were, respectively, 29.5%, 59.4% and 11.1% of the total grassland area. The ecological environmental health of the environment is generally stable or is improving. 2) In 2017, grassland ecosystem ecological environment health index ranged between values of 0.1097 and 0.3892, indicating that the overall health level was not high. Hence there is a need strengthen the protection and management provisions for grassland resources. 3) The results were used to devise and map three proposed grassland management categories for the grassland ecosystems in Ebinur Lake Basin: a governance area, a protection area and a prevention area. The governance area (in which management should be strengthened to ensure current health status is maintained) accounts for 39.1% of the total grassland area, mainly located in mountain foothills and desert grassland. The protection area (where effort is needed to reverse a current degradation trend) accounts for 34.2% of the total grassland area, mainly distributed in particular mountain foothill regions. The prevention area (generally with good health status but needing management of population pressures from nearby cities) accounts for 26.7% of the total grassland area, mainly in the areas with relatively concentrated towns.

Key words: grassland ecosystem, time information entropy, PSR model, health diagnosis

刘思怡, 丁建丽, 张钧泳, 张振华, 陈香月, 玛依拉·热西丁. 艾比湖流域草地生态系统环境健康遥感诊断[J]. 草业学报, 2020, 29(10): 1-13.

LIU Si-yi, DING Jian-li, ZHANG Jun-yong, ZHANG Zhen-hua, CHEN Xiang-yue, Mayira·Raxidin. Remote sensing diagnosis of grassland ecosystem environmental health in the Ebinur Lake Basin[J]. Acta Prataculturae Sinica, 2020, 29(10): 1-13.

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