摘要
快速城市化背景下,经济发达区生境斑块日益破碎化,生物多样性受到严重威胁,构建生态网络是有效连接生境斑块和保护物种栖息地的重要手段。以江苏省为例,采用形态学空间格局分析(MSPA)方法识别重要生态源地,基于最小累积阻力模型构建生态网络连接生态源地,并选取整体连通性指数(IIC)量化生态源地斑块和生态廊道的重要性,最后提出江苏省生态网络优化建议,为江苏省生态安全格局构建提供参考和借鉴。主要研究结果如下:(1)核心区斑块主要用地类型为大型水体、湿地和林地,主要包括太湖、洪泽湖、高邮湖、骆马湖等大型湖泊、东部沿海地区的湿地以及江苏西南部的林地斑块;(2)由于江苏省耕地面积广阔,因此耕地在生态网络中有较大比例;(3)水域、林地、湿地也是生态廊道的主要组成部分,为减小水体对动物迁徙的阻碍作用,可以在水域周边人工造林,为动物迁徙提供暂栖地;(4)生态廊道构成中,建设用地占比15.44%,这是近年来江苏省快速城镇化和建设用地的过度扩张的结果。
Rapid urbanization and economic development in China have led to urban sprawl and habitat fragmentation,especially in economically developed regions.Habitat fragmentation and the resultant decrease in habitat connectivity have become a serious challenge for biodiversity conservation.The development of ecological networks is regarded as an effective way to increase the connectivity between fragmented habitat patches and promote biodiversity conservation.Taking Jiangsu province,a rapidly urbanization district in the east of China,as a case study,ecological sources were identified by using morphological spatial pattern analysis(MSPA)and ecological corridors between sources were established by using minimum cumulative resistance(MCR)model.And the importance of ecological sources and corridors was ranked based on the integral index of connectivity(IIC).The research results show that:(1)the core areas mainly contain Taihu Lake,Hongze Lake,Gaoyou Lake,Luoma Lake,wetlands in the eastern coastal areas and forest in the southwest of Jiangsu Province;(2)there is a large proportion of cultivated land in the ecological corridors because there are vast farmlands in our study area;(3)waters,woodlands and wetlands are the major components of ecological corridors.Artificial afforestation around waters is an effective way to provide temporary habitat for animal migration;(4)some ecological corridors has to go across construction land,resulting from rapid urbanization in Jiangsu Province.
作者
王玉莹
沈春竹
金晓斌
鲍桂叶
刘晶
周寅康
WANG Yuying;SHEN Chunzhu;JIN Xiaobin;BAO Guiye;LIU Jing;ZHOU Yinkang(School of Geographic and Oceanographic Science,Nanjing University,Nanjing 210023,China;Institute of Land Surveying and Planning of Jiangsu,Jiangsu 210017,China;Key Laboratory of Coastal Zone Exploitation and Protection,Ministry of Natural Resources,Jiangsu 210017,China;Natural Resources Research Center of Nanjing University,Jiangsu 210023,China)
出处
《生态科学》
CSCD
2019年第2期138-145,共8页
Ecological Science
基金
长三角经济发达地区土地生态空间管控红线划定技术示范(201511001-03)
