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应用生态学报 ›› 2016, Vol. 27 ›› Issue (5): 1611-1618.doi: 10.13287/j.1001-9332.201605.016

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鄱阳湖生态经济区生态网络构建与评价

陈小平, 陈文波*   

  1. 江西农业大学南昌市景观与环境重点实验室, 南昌 330045
  • 收稿日期:2015-09-02 出版日期:2016-05-18 发布日期:2016-05-18
  • 通讯作者: cwb1974@126.com
  • 作者简介:陈小平,男,1990年生,硕士研究生. 主要从事土地利用规划、景观生态学研究. E-mail: 844989387@qq.com
  • 基金资助:
    本文由国家自然科学基金项目(41161031,41561043)资助

Construction and evaluation of ecological network in Poyang Lake Eco-economic Zone, China.

CHEN Xiao-ping, CHEN Wen-bo*   

  1. Nanchang Key Laboratory of Environment and Landscape, Jiangxi Agricultural University, Nanchang 330045, China
  • Received:2015-09-02 Online:2016-05-18 Published:2016-05-18

摘要: 大型生态斑块是区域生物多样性保护的重要基础.然而,随着我国城镇化的快速推进,人类活动对环境的干扰越来越强烈,不仅大型生态斑块数量不断减少、质量不断下降,而且斑块之间连接出现弱化, “孤岛化”现象严重,严重影响区域生物多样性保护.本文以鄱阳湖生态经济区为例,通过GIS技术手段,充分考虑景观类型、坡度和人类活动干扰的影响,采用最小费用模型构建了该区域的潜在生态廊道.基于重力模型定量分析了生态斑块间的相互作用强度,并以此将潜在生态廊道分成2级以便区别保护,识别了研究区重要生态节点和生态断裂点,分析了该潜在生态网络结构的连通性.结果表明: 森林和农田是构成研究区生态廊道的主要景观类型;生态斑块之间的相互作用强度差异显著;区域生态网络结构较复杂,网络连接度和闭合度较高.研究结果可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.

Abstract: 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.