生态学报2017，Vol.37Issue(11)：3849-3861,13.DOI:10.5846/stxb201702200273
基于PSR框架的内蒙古自治区土壤保持服务分区
Soil conservation service zoning in the Inner Mongolia Autonomous Region based on PSR framework
摘要
Abstract
Soil erosion has been a critical ecological issue in northern China.Inner Mongolia Autonomous Region is located in the arid and semi-arid area,which is a typical soil erosion area in northern China.Based on the analytical framework of pressure-state-response (PSR),this study takes the Inner Mongolia Autonomous Region as the study area,and constructs the index system from three aspects:climatic background,soil conservation,and vegetation condition.It aims at addressing the remaining issue of complexity and subjectiveness in weigh specification towards ecological function zoning in the previous studies.In the study,self-organizing feature map (SOFM) neural network and GIS spatial analysis technique were applied to carry out the soil conservation service zoning with the 1280 small watersheds as the basic unit and the schemes were optimized according to the aggregation degree of the zoning units.The Inner Mongolia Autonomous Region was divided into three ecological functional zones and eleven sub-zones based on the principle of regional conjugation.The three ecological functional zones include Soil Conservation Services Protection Area,Soil Conservation Services Controlling Area,and Soil Conservation Services Rehabilitation Area.According to the characteristics of zoning,the results clearly indicate the zonal distribution of climatic background,soil conservation service and vegetation condition in Inner Mongolia,and quantify the characteristics and spatial differences of the ecological functions at watershed scale more comprehensively.The result of the optimal soil conservation service zoning was compared to the annual average temperature contours and annual precipitation contours in Inner Mongolia.It shows that the ecological function zoning results obtained by SOFM neural network model were in good agreement with the spatial patterns of basic ecological elements.The zoning scheme indicates a significant gradient and is consistent with changes in temperature and precipitation.关键词
土壤保持服务/RUSLE模型/RWEQ模型/SOFM神经网络/内蒙古自治区Key words
soil conservation service/RUSLE model/RWEQ model/SOFM neural network/Inner Mongolia Autonomous Region引用本文复制引用
彭建,武文欢,刘焱序,胡熠娜..基于PSR框架的内蒙古自治区土壤保持服务分区[J].生态学报,2017,37(11):3849-3861,13.基金项目
国土资源部公益性行业科研专项经费课题(201511001-01) （201511001-01）
