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### 基于植被覆盖与生产力视角的亚喀斯特区域生态环境特征研究——以黔中部分地区为例

1. 1. 贵州师范大学地理与环境科学学院, 贵阳 550001
2. 贵州省山地资源与环境遥感应用重点实验室, 贵阳 550001
• 收稿日期:2014-10-23 修回日期:2015-01-11 出版日期:2015-04-10 发布日期:2015-04-10
• 作者简介:

作者简介：许璟(1990- ),女,安徽黄山人,硕士,研究方向为地理信息与遥感应用。E-mail: 460096669@qq.com

• 基金资助:
国家自然科学基金项目(41161002);贵州省省长基金项目(黔省专合字(2011)46号);全国生态环境十年(2000-2010)变化遥感调查与评估贵州专题项目(2012-2013)

### Research on characteristics of ecological environment in a semi-karst region based on vegetation cover and NPP : A case study in central Guizhou province

Jing XU1,2(), Yulun AN1,2(), Feng HU1,2, Liangrui MA1

1. 1. School of Geographic and Environmental Science, Guizhou Normal University, Guiyang 550001,China
2. Guizhou Mountain Resources and Environmental Remote Sensing Application Laboratory, Guiyang 550001,China
• Received:2014-10-23 Revised:2015-01-11 Online:2015-04-10 Published:2015-04-10

Abstract:

In order to study the ecological environmental characteristics of a semi-karst region, the paper takes the central area of Guizhou Province as a research area, which includes the Anshun city, Pingba County and Huaxi District. The region is the typical representative of semi-karst and karst Guanling group and Anshun group rocks. By using the TM image data and MODIS-NPP image data in April 2010, the paper makes a comparative study on the vegetation coverage and net primary productivity (NPP) and explores the ecological characteristics such as status of vegetation, vegetation net primary productivity, land carrying capacity and landscape diversity in semi-karst and karst regions by the method of NDVI dimidiate pixel model and grid computation. The research showed that the semi-karst region has different ecological features from a traditional karst region. Under the same land use type conditions, the vegetation growth of the semi-karst region has obvious advantages, which indicates arbor as the representative of the high vegetation coverage has wide and continuous concentration distribution. By contrast, high vegetation coverage area of the karst region is mainly composed of shrubs, scattered and broken. Overall the semi-karst region has the high land carrying capacity; its net primary productivity level is also significantly higher than that of the karst region. However, close attention should be paid to sensitivity of the ecological environment to human activities in the semi-karst region. Landscape analysis shows that although the vegetation coverage degree is bigger, the number of plaque is larger, the unit area is lesser and the plaque is more broken. The phenomenon shows that the semi-karst vegetation is prone to disturbance and degradation under the interference of environment and vegetation component is not stable. Fragmentation index and Shannon Diversity index also shows that the degree of landscape heterogeneity is larger and landscape structure is more complicated. Therefore, through the analysis of the characteristics of the semi-karst region's eco-environment, the paper pointed out that the ecological environment problems in the region need more concern, and the eco-environment in this region needs further research. Also we should take appropriate measures to restore and protect the ecology and implement better ecological development strategy. By using the superior conditions of the regional ecological environment and implementing reasonable human production activities, we are able to promote the harmonious development of human and nature.