[基于碳汇和景观连通性的跨流域生态安全格局构建]。

Q2 Environmental Science Huanjing Kexue/Environmental Science Pub Date : 2024-10-08 DOI:10.13227/j.hjkx.202310035
Meng-Wei Han, Shuai-Pu Zhang, Qin-Xue Xu, Jun-Feng Dai, Guang-Ling Huang
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引用次数: 0

摘要

人工水系的建立和土地利用的变化对生态系统产生了巨大影响。构建基于碳汇和景观连通的跨流域生态安全格局在区域生态环境保护中发挥着关键作用。本研究选取湘江与漓江联动区为研究对象。本研究基于 2000-2020 年的土地利用数据,利用 InVEST 模型结合形态空间格局分析(MSPA)对湘漓连通区域的生态安全网络进行了研究,并对其时空格局进行了评价。并对碳储量和生态安全格局的时空演变进行了评价。结果表明:①2000-2020 年,湘漓结合部土地覆被类型以林地和耕地为主。土地利用类型的变化特点是耕地、林地和草地减少,水域和建设用地增加。湘漓结合部碳储量呈块状分布,以高、中碳储量区为主。受土地利用变化的影响,2000-2010 年碳储量缓慢增加,2010-2020 年碳储量急剧下降,累计减少 18.32×103 t。③ 生态源面积(共 5 个)先减后增。生态廊道长度(共 10 条)先增加后减少。先增加后减少)。总体而言,在城市化进程中,湘漓结合部生态阻力值较高的区域分布逐渐向东北方向扩展,而生态安全格局的临界点则向西南方向移动。通过碳储存斑块与景观格局的耦合,确定生态源的动态分布与稳定性,可为构建跨流域生态系统的生态安全格局提供新的途径。
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[Construction of Cross-basin Ecological Security Patterns Based on Carbon Sinks and Landscape Connectivity].

Artificial water system creation and land use changes have great effects on ecosystems. The construction of cross-basin ecological security patterns based on carbon sinks and landscape connectivity plays a key role in regional ecological environment protection. The linkage area between the Xiang River and the Li River was selected as the research object. Based on the land use data from 2000 to 2020, this study examined the ecological security network of the Xiang-Li connected region using the InVEST model combined with morphological spatial pattern analysis (MSPA) and evaluated the temporal and spatial evolution of carbon storage and ecological security patterns. The results showed that: ① From 2000 to 2020, the land cover types of the Xiang-Li linkage area were mainly forest land and arable land. The changes of land use types were characterized by decreases in arable land, forest land, and grassland and by increases in watersheds and construction land. ② The carbon storage in the Xiang-Li linkage area was characterized by a blocky distribution, and the high and medium areas were dominant. The carbon stock increased slowly from 2000 to 2010 and decreased dramatically from 2010 to 2020, with a cumulative decrease of 18.32×103 t due to the influence of land use changes. ③ The area of ecological sources (five in total) decreased firstly and then increased, whereas the length of ecological corridors (ten in total) increased firstly and then decreased in the Xiang-Li linkage area. Overall, in the process of urbanization, the distribution of the high ecological resistance value in the Xiang-Li linkage area gradually shifted to the northeast with an expansion, whereas the barycenter of the ecological safety pattern shifted to the southwest. Determining the dynamic distribution and stability of ecological sources by coupling carbon storage patches and landscape patterns can provide a new way to construct ecological security patterns in cross-basin ecosystems.

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来源期刊
Huanjing Kexue/Environmental Science
Huanjing Kexue/Environmental Science Environmental Science-Environmental Science (all)
CiteScore
4.40
自引率
0.00%
发文量
15329
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