文献类型：期刊文献

中文题名：宜昌市生态安全网络要素时空动态及其影响因素

英文题名：Spatio-temporal dynamics and influencing factors of ecological security network elements in Yichang,Hubei Province

作者：李彤[1,2,3] 贾宝全[1,2,3] 刘文瑞[1,2,3] 张秋梦[1,2,3] 姜莎莎[1,2,3]

第一作者：李彤

机构：[1]中国林业科学研究院林业研究所,北京100091;[2]国家林业和草原局林木培育重点实验室,北京100091;[3]国家林业局城市森林研究中心,北京100091

年份：2023

卷号：43

期号：15

起止页码：6154-6169

中文期刊名：生态学报

外文期刊名：Acta Ecologica Sinica

收录：CSTPCD;;Scopus;北大核心:【北大核心2020】；CSCD:【CSCD2023_2024】；

基金：中央级公益性科研院所基本科研业务费专项资金项目(CAFYBB2020ZB008)。

语种：中文

中文关键词：生态安全网络;生态源地;生态廊道;生态夹点;生态障碍点;地理探测器

外文关键词：ecological security network;ecological source;ecological corridor;ecological pinch point;ecological barrier;Geographic Detector

分类号：S15

摘要：生态安全网络是维持城市生态系统结构完整性与功能多样性的重要框架,连接其中的生态要素对协调城市建设与生态系统可持续发展具有导向性意义。以三峡大坝所在地宜昌市为研究对象,基于“源地识别-阻力面构建-廊道提取-节点分析”的网络范式,对2000—2020年不同生态安全网络要素的时空动态特征及其影响因素进行分析。研究结果显示:(1)基于核心区筛选、生境质量热点提取、景观连通性判断以及自然保护地检验等步骤综合识别的宜昌市生态源地在三个时期分别为43.41、49.03万hm~2和47.76万hm~2,集中分布在三峡库区水土保持区;生态廊道数量、里程及覆盖面积逐渐减少,其中廊道数量与里程集中在平原浅丘生态建设区,而廊道覆盖面积聚集在三峡库区水土保持区,生态夹点数量与面积先增后减,均集中在三峡库区水土保持区,生态障碍点集中在三峡库区水土保持区和平原浅丘生态建设区;(2)生态阻力结构自西向东逐渐增加,不同时期阻力值分别为38.90、42.19和40.66,平原浅丘生态建设区内生态阻力强度显著高于其他分区;(3)以降水量为代表的气候要素对生态源地空间分布驱动效果最为显著,土壤类型影响最为薄弱,不同影响因子之间以降水与其它因素的交互作用更加强烈。围绕宜昌市生态安全网络要素的时空异质性及其影响机制所展开的系统性论述一定程度上解释了地区生态安全现状的发展趋向与潜在挑战,为以三峡屏障构筑工程为代表的生态安全建设与管理工作提供了科学支撑。
Ecological security network is an important framework for maintaining the structural integrity and functional diversity of the urban ecosystem.The interconnected ecological elements are of great significance for balancing construction and sustainable development of the urban ecosystem.Taking Yichang City,where the Three Gorges Dam is located,as the object,the ecological security network was constructed based on the paradigm of“ecological source,ecological resistance,ecological corridors,ecological pinch points,and ecological barriers”.We analyzed the spatio-temporal dynamics of different ecological security network elements in 2000,2010,and 2020 and explored the influencing mechanism.The results showed that:(1)the ecological source was identified based on the MSPA(Morphological spatial pattern analysis),habitat quality aggregation analysis,landscape connectivity analysis,and natural reserve area analysis.In 2000,2010,and 2020,the area of the ecological source was 43.41×10^(4),49.03×10^(4),and 47.76×10^(4)hm^(2),respectively.They were concentrated in the Three Gorges Dam water and soil conservation zone.The number,length,and area of the ecological corridor decreased gradually from 2000 to 2020.The number and length of the ecological corridor were mainly concentrated in the plain shallow mound ecological construction zone,while the area was mainly concentrated in the Three Gorges Dam water and soil conservation zone.The number and area of the ecological pinch point first increased and then decreased from 2000 to 2020.They were concentrated in the Three Gorges Dam water and soil conservation zone.The number and area of the ecological barrier were concentrated in the Three Gorges Dam water and soil conservation zone and the plain shallow mound ecological construction zone.(2)The value of the ecological resistance was 38.90,42.19,and 40.66,respectively.They increased gradually from west to east.The resistance value of the plain shallow mound ecological construction zone was significantly higher than that in other zones;(3)The influencing mechanism of the ecological source showed that the precipitation had the strongest explanatory effect,while the soil type had the weakest effect.The interaction between different influencing factors showed that the precipitation and other factors had more intense interaction.The systematic discussion on the spatio-temporal heterogeneity of the ecological security network elements and its impact mechanism in Yichang explained the development trend and the potential challenge of the current situation of ecological security network.It could provide scientific support for the construction and management of related projects of ecological security network,such as the Three Gorges Barrier Construction Project.