摘要
文中以塞罕坝地区为研究对象,采用形态学空间格局分析方法(MSPA)提取出对生态网络构建具有重要作用的核心区,并从中筛选出对维持景观连通性贡献最大的15个斑块作为研究区生态源地,利用最小累积阻力模型(MCR)提取有利于物种迁移与扩散的潜在廊道,并结合重力模型对潜在廊道进行分级从而构建形成生态网络,在对生态网络结构特征分析的基础上提出了生态网络优化策略。结果表明:1)塞罕坝地区植被覆盖度高,生态源地面积大,占研究区总面积的57%,源地分布较为均匀,但内部连通性不强,景观呈现破碎化。2)基于MCR模型提取了潜在生态廊道105条,其中重要廊道44条,主要分布于三道河口和阴河林区内。3)将生态源地与结构性廊道相连接形成了一个闭合生态网络,中部千层板林区和西部三道河口林区网络结构较为复杂,稳定性强,生境状况更好,北部和南部地区结构简单且与其他区域连通性较差。4)结合塞罕坝地区实际情况,提出保护生态源地,划定源地保护红线,拓宽廊道宽度等生态网络优化策略。旨在为高原山地过渡带或特殊地理单元保护生物多样性,更好发挥其生态功能,加强可持续发展能力,进一步融入大尺度范围的生态网络提供一些方法与建议。
Taking Saihanba area as the research object,morphological spatial pattern analysis(MSPA)was used to extract the core areas that play an important role in the construction of ecological network,and the 15 patches that contribute the most to the maintenance of landscape connectivity were selected as the ecological source of the study area,the minimum cumulative resistance model(MCR)was used to extract potential corridors that is conducive to species migration and diffusion,and the potential corridors were graded by gravity model to form an ecological network.Based on the analysis of the characteristics of the ecological network structure,the ecological network optimization strategy was proposed.The results show that:1)The vegetation coverage in Saihanba area is higher,ecological source area is large,accounting for 57%of the total area of the study area.The source areas are evenly distributed,but the internal connectivity is weak,and the landscape is fragmented.2)Based on the MCR model,105 potential ecological corridors are extracted,including 44 important corridors,mainly distributed in the Sandaohekou and Yinhe forest areas.3)The ecological source is connected with the structural corridor to form a closed ecological network.The network structure in the central Qiancengban forest region and the western Sandaohekou forest region is relatively complex,with strong stability and better habitat conditions.The network structure in northern and southern regions is simple and connectivity with other regions is poor.4)According to the actual situation of Saihanba area,the ecological network optimization strategies such as protecting the ecological source,delimiting the source protection red line,and widening the corridor are proposed.
作者
韩阳媚
王锦
于世涛
程顺
李玉灵
HAN Yangmei;WANG Jin;YU Shitao;CHENG Shun;LI Yuling(College of Forestry,Agricultural University of Hebei,Baoding 071000;College of Humanities and Social Sciences,Agricultural University of Hebei,Baoding 071000;Saihanba Mechanical Forest Farm of Hebei,Weichang 068450,China)
出处
《干旱区资源与环境》
CSSCI
CSCD
北大核心
2023年第5期112-121,共10页
Journal of Arid Land Resources and Environment
基金
承德国家可持续发展议程创新示范区建设科技专项(222104F009)资助
