Chen Xiao Ping, Chen Wen Bo
Nanchang Key Laboratory of Environment and Landscape, Jiangxi Agricultural University, Nanchang 330045, China.
Ying Yong Sheng Tai Xue Bao. 2016 May;27(5):1611-1618. doi: 10.13287/j.1001-9332.201605.016.
Large-scale ecological patches play an important role in regional biodiversity conservation. However, with the rapid progress of China's urbanization, human disturbance on the environment is becoming stronger. Large-scale ecological patches will degrade not only in quantity, but also in quality, threatening the connections among them due to isolation and seriously affecting the biodiversity protection. Taking Poyang Lake Eco-economic Zone as a case, this paper established the potential ecological corridors by minimum cost model and GIS technique taking the impacts of landscape types, slope and human disturbance into consideration. Then, based on gravity quantitative model, we analyzed the intensity of ecological interactions between patches, and the potential ecological corridors were divided into two classes for sake of protection. Finally, the important ecological nodes and breaking points were identified, and the structure of the potential ecological network was analyzed. The results showed that forest and cropland were the main landscape types of ecological corridor composition, interaction between ecological patches differed obviously and the structure of the composed regional ecological network was complex with high connectivity and closure. It might provide a scientific basis for the protection of biodiversity and ecological network optimization in Poyang Lake Eco-economic Zone.
大规模生态斑块在区域生物多样性保护中发挥着重要作用。然而，随着中国城市化进程的快速推进，人类对环境的干扰日益增强。大规模生态斑块不仅在数量上会退化，质量也会下降，由于隔离而威胁到它们之间的连通性，严重影响生物多样性保护。本文以鄱阳湖生态经济区为例，考虑景观类型、坡度和人类干扰的影响，利用最小成本模型和GIS技术建立了潜在生态廊道。然后，基于重力定量模型，分析了斑块间生态相互作用的强度，并将潜在生态廊道划分为两类进行保护。最后，识别出重要生态节点和断点，分析了潜在生态网络的结构。结果表明，森林和农田是生态廊道构成的主要景观类型，生态斑块间的相互作用差异明显，所构建的区域生态网络结构复杂，连通性和闭合性较高。这可能为鄱阳湖生态经济区生物多样性保护和生态网络优化提供科学依据。
