喀斯特生态系统退化诊断特征及风险评价研究--以毕节石漠化为例  

Study on Diagnostic Characteristics and Risk Evaluation of Degraded Ecosystem in Karst Area——A Case Study of Bijie Karst Rocky Desertification

作　　者：梁玉华[1] 张军以[2,1] 樊云龙[1] 

机构地区：[1]贵州师范学院地理与旅游学院,贵阳550003 [2]南京大学地理与海洋科学学院,南京210046

出　　处：《水土保持研究》2013年第1期240-245,共6页Research of Soil and Water Conservation

基　　金：贵州省科技攻关项目“喀斯特退化生态系统土壤动物生态指示功能研究”(黔科合SY字[2011]3017);贵州省科学技术基金“基于农户视角的喀斯特峰丛洼地生态恢复替代性生计模式选择研究”(黔科合J字[2012]2294);国家科技支撑计划子项目(2007BAD53B001);贵州师范学院环境科学特色重点学科专项基金

摘　　要：对喀斯特退化生态系统进行定量评价,是实现退化生态系统恢复的基础。以"自然—干扰—响应"框架为基础,将喀斯特退化生态系统分为系统特征、干扰及状态特征、响应特征。在分析喀斯特退化生态系统诊断特征及喀斯特环境特性的基础上,建立了喀斯特生态系统石漠化评价指标体系。采用分级赋值、综合评价的方法,以毕节地区为例,对生态系统退化(石漠化)的风险程度进行了初步评价,结果显示毕节地区喀斯特生态系统退化风险评价综合得分2.40分,生态系统退化风险较大评定为3等,其中系统特征、干扰及状态、响应分别得分3.1,1.83,2.25分。外界干扰是系统退化的最主要因素,其次是地区社会经济发展落后,导致社会经济等响应力度小。The quantitative evaluation of karst degraded ecosystems is the basis for restoring degraded ecosystem. Taking the karst degraded ecosystems as the case study, based on the ＇Natural-Interference-response＇ frame, the karst degraded ecosystem evaluation indicator system was established which included the system feature, interference and state feature, response feature and so on. Based on the analysis of diagnostic feature of degraded ecosystem and environment characteristics in karst region, the karst ecological deterioration （rocky desertification） evaluation index system was established. As a case of Bijie region, it has been preliminary evaluated with method of grade evaluation and comprehensive evaluation. The results showed that the karst ecological deterioration risk comprehensive evaluation scored 2.40 points, ecological deterioration risk assessment was the third Class, and the characteristics of the system, the disturbance and the state, response were scored 3.1, 1.83, 2.25 points, respectively. The results also showed that interference was the main reason for degraded system, followed by the local social economic development lag behind, leading to social economic strength small response.

关 键 词：退化生态系统 石漠化 风险评价 指标体系 

分 类 号：X826[环境科学与工程—环境工程]