摘要
以西北典型半干旱城市包头市为研究区,运用复杂网络的评价指标对包头市复杂层级网络的拓扑结构与空间鲁棒性进行评价,提取了第1、2、3级生态源地和第1、2、3层生态廊道,并识别了重要生态节点,构建了包头市层级生态网络。结果表明:第1、2、3层生态源地数量分别为8、31、123,生态廊道数量分别为8、35、151,重要生态节点数量分别为7、28、47。通过拓扑结构与空间鲁棒性分析可知:第1层生态网络连通度最低,核数为2,结构简单但重要性最高,其稳定性影响整个层级生态网络的稳定;第2层生态网络由于增加连通性较低的生态节点,可增加小尺度的生态稳定性,但对大尺度层级生态网络稳定性提升没有明显作用;第3层生态网络核数为4,生态网络连通性最高且结构复杂。在第1、2、3层网络恶意攻击比随机攻击的破坏性均更强。第2、3层生态网络中源地节点数量较多,但低等级源地比例高,对增强网络的抗打击能力与恢复能力效果不明显。
Baotou is a typical semi-arid city in Northwest China.The hierarchical ecological network model was used to construct the hierarchical ecological network of Baotou City.Based on the complex network theory,the static characteristic index and spatial robustness index were calculated,and the topological structure of the complex hierarchical ecological network was analyzed.The results showed that the first,second and third ecological sources and the first,second and third ecological corridors were extracted by using the hierarchical ecological network model,and the important ecological nodes were identified.The number of ecological sources in the first,second and third layers was 8,31 and 123,the number of ecological corridors was 8,35 and 151,and the number of important ecological nodes was 7,28 and 47,respectively.The first layer of ecological network had the lowest connectivity and two cores.Its structure was simple but its importance was the highest.The stability of the first layer of ecological network affected the stability of the whole region s hierarchical ecological network.The second layer of ecological network can increase the small-scale ecological stability by increasing the ecological nodes with low connectivity,and had no obvious effect on the stability improvement of the large-scale ecological network.The third layer had four cores,and the highest connectivity structure of the ecological network was complex.Malicious attacks were more destructive than random attacks.The number of source nodes in the second layer and the third layer ecological network was large,but the proportion of low-level source sites was high,and the anti-attack ability and recovery ability of the network were not obviously enhanced.
作者
王戈
于强
YANG Di
张启斌
岳德鹏
刘建华
WANG Ge;YU Qiang;ZHANG Qibin;YUE Depeng;LIU Jianhua(Beijing Key Laboratory of Precision Forestry,Beijing Forestry University,Beijing 100083,China;Department of Geography,University of Florida,Gainesville FL 32611,USA)
出处
《农业机械学报》
EI
CAS
CSCD
北大核心
2019年第7期258-266,312,共10页
Transactions of the Chinese Society for Agricultural Machinery
基金
中央高校基本科研业务费专项资金项目(BLX201806)
中国博士后科学基金面上项目(2018M641218)
关键词
包头市
层级生态网络
复杂网络分析方法
拓扑结构
结构鲁棒性
Baotou City
hierarchical ecological network
complex network analysis method
topology
structural robustness
