Quantitative Evaluation of Ecosystem Health in a Karst Area of South China
Quantitative Evaluation of Ecosystem Health in a Karst Area of South China
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DOI：
10.3390/su8100975
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发表时间：
2016-10-01
期刊：
影响因子：
3.9
通讯作者：
Li, Bo
中科院分区：
文献类型：
--
作者：
Chen, Shengzi;Zhou, Zhongfa;Li, Bo
本研究的目的是提出一个基于GIS的喀斯特石漠化生态系统健康诊断机制。以贵州省花江示范区为例，提出了一个多因子的KRD生态系统健康诊断指标体系。一套地质，环境和社会经济健康指标的基础上，从实地调查，水文和气象监测数据的遥感图像。利用栅格GIS技术，提出了一种在5 m/5 m栅格尺度上荒漠化空间表现的诊断指标。采用基于栅格数据的空间叠加技术，对花江示范区10年来生态系统健康的时空动态进行了跟踪研究。分析结果表明，花江示范区生态系统健康状况存在区域差异，总体上随着时间的推移有所改善。健康面积比例从2000年的3.7%提高到2010年的8.2%。但是，到2010年，不健康和中等健康地区仍占总面积的78.7%。生态系统健康的改善最明显的是在一个实施了遏制KRD的综合控制措施的地区。研究结果表明，综合治理KRD可以有效缓解中国南方喀斯特地区生态系统的恶化，改善生态系统健康。
The purpose of this study is to propose a GIS-based mechanism for diagnosing karst rocky desertification (KRD) ecosystem health. Using the Huajiang Demonstration Area in Guizhou Province as a case study, this research offers a multi-factor indicator system for diagnosing KRD ecosystem health. A set of geologic, environmental, and socio-economic health indicators were developed based on remote sensing images from field-investigation, hydrological, and meteorological monitoring data. With the use of grid GIS technology, this study gives an indicator for diagnosing the spatial expression of desertification at a 5 m mu 5 m grid scale. Using spatial overlaying technology based on grid data, the temporal and spatial dynamics of ecosystem health in the Huajiang Demonstration Area were tracked over a 10 year time span. The results of the analysis indicate that ecosystem health in the Huajiang Demonstration Area varies regionally, and has overall improved over time. The proportion of healthy area increased from 3.7% in 2000 to 8.2% in 2010. However, unhealthy and middle-health areas still accounted for 78.7% of the total area by 2010. The most obvious improvement of ecosystem health was in an area where comprehensive control measures for curbing KRD were implemented. These results suggest that comprehensive control of KRD can effectively mitigate ecosystem deterioration and improve ecosystem health in karst regions of South China.