Research On Urban Landscape Ecological Security In Fuzhou City

This essay uses landscape ecology theory and urban ecological security theory, according to three aspects of landscape structure, landscape function and landscape balanced degree for the first time, preliminarily establishes the comprehensive evaluation index system of urban landscape ecological security. And puts forward the evaluation method for urban landscape ecological security. Based on the above, taking Fuzhou, this historical cultural city, as an example, the essay makes a map of Urban landscape ecological classification in Fuzhou by the technique of remote sensing and geographic information system. Then selects landscape index,and socioeconomic and ecological environmental assessment indicators,makes a comprehensive assessment of landscape ecological security in Fuzhou city by the improved AHP methods of analysis. And then analyzes limiting factors which have impacts on the landscape ecological security in Fuzhou city.The results show that the landscape eco-security of Fuzhou city is belong to the average or early-warning condition which is a bit gap from the better level 4 condition, indicating that the security situation could not be neglected. Why? Landscape pattern security have a negative impact on urban landscape ecological security, and there are the degree of ecological landscape fragmentation, the degree of building landscape contagion, urban vegetations rate in built-up areas, and per-capita public greenland, etc, which become the most important limiting factors to have impacts on Fuzhou city's landscape eco-security.The study finds that the existing problems are mainly as follows: The first one, the pattern and distribution of urban building landscape is unreasonable; Second, intervention and destroy by people in ecological landscape tends to be serious; Third, landscape beauty effectiveness is pretty bad, which is mostly resulted from some environmental conditions; Fourth, thelevel of science-education input and environmental protection innvestment have to be further enhanced; Fifth, urban vegetation development is not enough ,which has impacts on urban landscape eco-security. The above results tallies with the facts of urban landscape and ecological environment in Fuzhou city, showing that evaluation target system of urban landscape ecological security has certain feasibility and its credibility is high.According to the above assessment results, the research on landscape ecological security construction would be conducted. Firstly, thoses results are applied to the design of landscape ecological security pattern. By constructing such as urban landscape ecological conservation sources, important ecological corridors and landscape strategic points, it thus is favourable to improve ecological environment between town and country, to greatly improve the unity and continuity of urban landscape,and to exert initiative and efficient effects on preserving urban ecological security. Besides, the essay puts forward some measures in optimizing urban landscape and some strategies of ecological environment management so as to generally improve the degree of urban landscape ecological security.