|【目的】建立一个简单的草地参照生态系统筛选方法。【方法】基于遥感数据源,从草地生态系统结构、功能与服务等角度,选取主观性相对较弱且简单的指标体系开展生态系统评价；引入Holdridge生命地带模型并进行区域适宜性改进,将草地生态系统划分为34个生态区。基于生态系统结构、功能、服务的评价结果对草地各分区开展参照生态系统的筛选。【结果】在甘孜州对新的方法进行了测试,基于遥感数据对生态系统结构、功能和服务开展质量评估。选取各个生态区前10%的值作为质量基线,高于质量基线的区域选为参照生态系统。基于生态系统结构、功能和服务筛选出的草地参照生态系统的面积分别为5323.75 km2、5274.75 km2和5274.25 km2。【结论】提供了一个简单、清晰的方法,有助于开展生态修复时,为受损草地生态系统确定参照生态系统,分析评价生态系统退化程度,并判断其恢复能力,为研究区的生态修复计划、目标和最终评估提供依据与基准。
|关键词: 参照生态系统 生态系统质量 生态系统分区 生态修复规划
|Reference Selection of Grassland Ecosystem Based on Remote Sensing—A Case Study of Ganzi, China
Huangzengjing1, Chenshengbin1, Shaochangliang2, Huangwenjie1, Chenzhiyang3, Lixianfu4
1.Chengdu University of Technology;2.Institute of Agricultural Resources and Regional Planning;3.Sichuan Huadi Construction Engineering Co., Ltd;4.Sichuan Shuxi Geological Engineering Survey Group Co., Ltd
|[Purpose] Establish a basic method to simply screen the grassland reference ecosystem. [Method] Based on remote sensing data sources, from the perspective of grassland ecosystem structure, function and service, a relatively weak and simple index system was selected to carry out ecosystem evaluation. By introducing the Holdridge life zone model and improving the regional suitability, the grassland ecosystem was divided into 34 ecological zones. Based on the evaluation results of ecosystem structure, function and service, the reference ecosystem was screened for each grassland partition. [Result] The new method was tested in Ganzi Prefecture, and the quality assessment of ecosystem structure, function and service was carried out based on remote sensing data. The top 10 % of each ecological zone was selected as the quality baseline, and the area higher than the quality baseline was selected as the reference ecosystem. The area of grassland reference ecosystem based on ecosystem structure, function and service was 5323.75 km2, 5274.75 km2 and 5274.25 km2, respectively. [Conclusion] This paper provides a simple and clear method, which is helpful to determine the reference ecosystem for the damaged grassland ecosystem, analyze and evaluate the degree of ecosystem degradation, and judge its recovery ability when carrying out ecological restoration. It provides the basis and benchmark for the ecological restoration plan, goal and final evaluation of the study area.
|Key words: reference ecosystem ecosystem quality ecosystem division ecological restoration planning