城市生态源地识别与生态廊道构建

City ecological source recognition and ecological corridor construction

针对当前城市化对生态系统的破坏逐渐加剧问题,该文构建了南昌市生态廊道。基于南昌市自身生态环境状况,采用遥感生态指数,结合高等级河网覆盖的流域,对生态源地进行识别,构建阻力面,模拟潜在生态廊道,提取主要生态廊道。研究结果表明:①南昌市生态源地主要由林地、水系和生态保护区等生态元素构成,呈现东多西少的分布趋势;②北部和东部生态信息流通性较高,生物多样性保持较好;③中部建成区较多,人类活动密集,生态廊道形成难度较高;④建议加强人类活动密集区域生态廊道沿线的绿化,以维持其生态功能和生物多样性。

In view of the damage of urbanization to ecological system increases gradually,the ecological corridor in Nanchang city was constructed in this paper.Based on the ecological environment in Nanchang,the remote sensing ecological index was used combining with high grade river basin for the ecological source recognition,the surface resistance and potential ecological corridor building in order to extract the main ecological corridor.Research results showed that the ecological source area in Nanchang city was mainly composed of forest land,water system and ecological protection area,and the distribution trend was more in east and less in west;the circulation of ecological information was higher and the biological diversity was better in north and east area of city;it was more difficult to form ecological corridors in central area of city with high altitude and intensive human activities;the greenness should be increased along ecological corridors in intensive human activities area to maintain ecological functions and biodiversity.