基于林鸟连接度的宁乡县城绿地生态网络优化

发布时间：2018-05-29 07:06

  本文选题：城市绿地生态网络 + 连接度　； 参考：《中南林业科技大学》2017年硕士论文

【摘要】：当前城市生态格局的生境破碎化越来越严重,城市发展对景观格局、原生物种的分割及干扰日趋严重,因此针对特定物种利用景观连接度对城市生态网络进行分析及优化的意义十分显著:其对解决景观空间类型破碎化和丰富景观空间异质性提供了理论基础,对优化景观空间格局与了解研究区域生态现状提供了技术指导和参考依据,对整个景观生态学进一步深化指导城市建设具有重要的现实意义。本文首先通过对国内外相关文献及案例进行研读,对相关理论基础、城市绿地生态网络的含义与构建的方法进行分析与总结,对当前城市绿地生态网络的现状、构建方法有了一定的理论基础,为后文的实证研究提供坚实的理论依据。本文的核心内容为基于林鸟连接度的现状对宁乡县中心城区绿地生态网络进行分析及优化。本研究基于城市绿地生态网络的相关理论,以长沙市宁乡县中心城区作为研究区域,以灰椋鸟作为研究区域中林鸟的指示物种,采用景观组分指数NC、综合连接度指数ⅡC、连接度概率指数pC以及重要性指数dI对研究区域的现有绿地生态网络的景观连接度进行分析,并选取了 11个与15个绿地斑块分别作为核心绿地斑块和重要绿地斑块,11条与16条连线分别作为核心飞行廊道和重要飞行廊道;再利用累积阻力模型MCR对绿地斑块及斑块间的连线进行分析,并识别不利于灰椋鸟进行生态扩散过程的绿地斑块及飞行廊道,发现其中核心绿地斑块中绿地斑块31受周边土地覆盖类型影响及本身的面积大小呈受中度干扰,绿地斑块43受居民点之人为干扰呈受中度干扰,核心飞行廊道中廊道50-42、28-3处于中度阻碍的状态。之后根据相关理论基础及原则,针对研究区域中存在的林鸟连接度问题进行生态保护及优化途径、新增“踏脚石”途径以及人文繁荣途径三个途径进行优化。
[Abstract]:At present, the habitat fragmentation of urban ecological pattern is becoming more and more serious, and urban development is becoming more and more serious to landscape pattern, division and interference of native species. Therefore, it is of great significance to analyze and optimize the urban ecological network by using landscape connectivity for specific species: it provides a theoretical basis for solving the fragmentation of landscape spatial types and enriching the spatial heterogeneity of landscape. It provides the technical guidance and reference basis for optimizing the landscape spatial pattern and understanding the ecological status of the study area, and has important practical significance for the whole landscape ecology to further deepen and guide the urban construction. First of all, this paper analyzes and summarizes the relevant theoretical basis, the meaning and construction methods of urban green space ecological network, and analyzes the current situation of urban green space ecological network through the study of relevant literature and cases at home and abroad. The construction method has a certain theoretical basis and provides a solid theoretical basis for the later empirical research. The core content of this paper is the analysis and optimization of green space ecological network in the central urban area of Ningxiang county based on the current situation of forest bird connectivity. Based on the theory of urban green space ecological network, this study took the central urban area of Ningxiang county of Changsha as the research area, and the grey starling as the indicator species of the forest birds in the study area. Landscape component index (NC), connectivity index (鈪，

本文编号：1949962