Stability of Landscape Pattern of Land Use:A Case Study of Changde

Land use reflects stability of the ecological process in land use pattern. Stability is the characteristic of land use and durative of ecological process, reflecting the coordinate between regional land use patterns and environmental condition. This article selects such elements as landscape pattern acreage, landscape number,patch number rate, patch density, patch average, average patch area, patch change coefficient, patch shape index, diversity index, landscape dominance index, landscape evenness, fractal dimension, etc., to analyse landscape pattern from landscape pattern structure, landscape pattern patch characteristics and landscape pattern heterogeneity. Based on the characteristic of landscape pattern through principal components analysis, it established landscape stability synthetic evaluation system for evaluation of land use landscape stability. Results show that, 1) cultivated land and woodland are the main part of landscape pattern in Changde City. They are important in controlling land use landscape stability. In the whole of landscape pattern, the cultivated land is in a dominant position, has a great significance on landscape overall spatial framework.. At the same time, not exploited land, agricultural land, land for urban and rural housing and public facilities, land for mining use and livestock farming are in minor status. Farmland patches are evenly disposed, transportation land patches form are complicated. On the whole, the landscape diversity is rich, the advantages and evenness are obvious, and the overall spatial framework is different. 2) Through the research of land use stability in Changde City, we know that, the difference of stability in land use landscape is obvious. Taoyuan County is most stable, and the order of the stability is Shimen, Lixian, Dingcheng district, Linli, Hanshou. Wuling district is most unstable, and the diversity of landscape patches is poor, landscape pattern is single. 3) Structure is able to determine function, this article researched land use stability function with that principle. The relation with structure driving ecosystem mechanism and effect, coupling mechanism of social and economic development are awaiting further study.