基于不同尺度的干旱区城市景观生态研究--以陕西榆林市为例

从区域与城市两个尺度水平 ,对毛乌素沙漠南缘的榆林市城市景观进行研究认为 :在大尺度水平上 ,区域景观生态特征对城市景观特征具有一定的控制作用 ,而城市景观强大的功能流对区域景观产生干扰作用。城市景观的空间扩展与演化 ,既受区域景观特征的影响 ,也是区域景观演化的一个有机构成部分 ;在小尺度空间上 ,景观功能区、景观斑块与廊道的格局与功能 ,对城市景观格局动态以及维持城市景观多样的生态功能具有重要意义。在不同的利益追求下形成的景观文化 ,将深刻地影响到区域与城市景观演化的方向与过程。

Study on the Urban Landscape Ecology in Arid Areas on the Different Scales --A Case Study in Yulin City, Shaaxi Province

There is a coordination problem between the urban development and the protection of vulnerable ecological environment in arid areas during the implementation of great development of west China. It is not only of significance for achieving sustainable development in arid areas but also plays an important role for maintaining the ecological safety pattern of China to deal with well the relationship between the urban development and the protection of the regional ecological environment in arid areas. In this paper, the urban landscapes in Yulin City, Shaaxi Province, are researched on urban and regional scales by using the theory of landscape ecology. It is considered that, on the horizontal scale, the characteristics of the regional landscape ecology play a certain control role to the urban landscape characteristics, and the strong function current of the urban landscapes disturbs the regional landscapes greatly. The spatial enlargement and evolution of the urban landscapes are affected by the characteristics of the regional landscapes, and they are also the organic component parts of the regional landscape evolution. On a small scale, the patterns and functions of the landscape functional districts, landscape spots and corridors are of significance to the dynamical status of urban landscape patterns and for maintaining the ecological function of the urban landscapes. The landscape culture formed under the pursuit of the different interests affects strongly the direction and process of the regional and urban landscape evolution.