The expansion speed of urban construction land-use was the fastest of all in the process of urbanization, thus led

to transferring from the other types of land-use. The present research methods of land-use change of urban land scape were mainly base on the remote sensing image data, and combined with GIS technology to make a quantitative or spatial analysis on land-use change of urban landscape [7] - [10] . In the research on land-use change of Suzhou-Wuxi-Changzhou from 1980 to 2000, Tu X.S. [7] pointed out that cultivated land reduced heavily due to a large number of urban and rural construction land expansion, in addition, the types of land-use change tended to be diversification, the system of land-use tended to be complex disorder and accelerated evolution. In the research on land-use change of Xi’an city from 1980 to 2000, Zhong Y. [8] pointed out that, in the urban landscape, the areas of construction land, forestland and park land have increased largely, but the areas of grassland, cultivated land, waters and unused land have decreased heavily, and the structure of land-use was simplified. Among which are construction land and forestland. Meanwhile, Wu X.Q. [9] also found that the urban construction land would expand continually with an average annual increase as 10.7 km² in the future, and a large number of cultivated lands would be occupied, by the process simulation method using the SLEUTH mode to compare the land-use changes of Shenyang city from 2005 to 2030. Furthermore, many domestic papers [10] were pointed out that the urban construction land expanded sharply and occupied the other types of land (especially the cultivated land), which had become the major characteristic of land-use change in the urban landscape.

The research on driving mechanisms of urban landscape land-use change from China mainly focused on revealing the reasons, the internal mechanism and the process of land-use change [11] - [14] . In the driving mechanism analysis of land-use change of Shenzhen city, Shi P.J. [11] pointed out that the speedy expansion of urban land-use was the most important driving factor, such as the growth of population, the opening of policy, the influx of foreign capital, the development of tertiary industry and so on. In the research on driving mechanisms of land-use change of Daqing city from 1988 to 2007 by using the panel data model, Dong J. [12] pointed out that the higher agricultural labor productivity and industrial output value, the more agricultural land-use and natural land-use transformed into urban land-use. In the driving force analysis of land-use change of Shanghai city from 1994 to 2006, Shi L.J. [13] pointed out that the prominent characteristic of land-use changes of Shanghai are the growth of population, the development of economy, and the policy, promoted a large number of cultivated land to transform into urban construction land. In the research on driving mechanisms of land-use change of Kunshan city by constructing the driving force model, He M. [14] pointed out that the main driving factors of land-use change from Kunshan were the development of economy and the growth of population, followed by scientific-technical progress. Accordingly, the driving mechanism of land-use change of urban landscape was relatively complex, the main driving factors of different regions were different, and these researches could provide useful information to predict the results and trends of land-use change in the future.

The single environmental factor affected by land-use change of urban landscape mainly referred to regional climate, soil, hydrology or biodiversity. In the research on thermal environment influence of land-use change of Dongguan city, Deng Y.J. [15] pointed out that the urban construction land had the largest thermal effect and contribution indexes, and it was the most concentrated land of high-temperature across the region. In the analysis of soil functions affected by suburban land-use change of Zhengzhou city, Lu Q.L. [16] pointed out that the producing functions of soil evolved into the bearing functions of soil on most of the urban construction land, meanwhile most of the ecological functions of soil would disappear forever. In the research on watery environment affected by land-use change of Wuxi city, Shen S.Y. [17] pointed out that the decrease of water area, the increase in impervious surface area, the increase in surface runoff with serious water pollution during the period of rainfall, all affected by land-use change. In addition, the urban land-use change had a serious influence on biodiversity. For example, in the research on diversity of green space plant communities in the central city of Shanghai, the result of Da L.J. [18] showed that the highest frequency of community was formed by only 5 species in the central city, and the species abundance of communities in the central city was less than in the suburbs. Above all, the land-use change of urban landscape had some negative influences on the single environmental factor, the present researches mainly focused on revealing and analyzing the process and results of influences, to emphasize the importance of eco-environmental protection in the process of urbanization.

The comprehensive ecological effect of land-use change of urban landscape was based on the service function of urban ecosystems to evaluate the ecological environment effect comprehensively by assigning quantitative values of the types of land-use of urban landscape [19] - [22] . In the analysis of comprehensive ecological effect of suburban land-use change of Beijing city, Wan L. [19] pointed out that the ecological value index was generally stable, the comprehensive ecological effect maintained relatively stable in the research area over a ten-year period. In the analysis of ecological environment effect of land-use change of Suzhou city from 1980 to 2005, Zhang F.Y. [20] pointed out that the eco-environmental quality index decreased continuously in the research area, and the speed of decrease was faster and faster, then the comprehensive quality of eco-environment was becoming more and more bad. In the research on ecological effect of town land-use of Beijing by using the comprehensive evaluation of ecological service value, Hou L.G. [21] pointed out that the massive reduced area of cultivated land and forest land led to the decrease of ecological service value in the area, and the comprehensive ecological effect weakened rapidly. In the analysis of ecological environment effect of land-use change of Linyi city from 1990 to 2009, Ma Q.S. [22] pointed out that the decrease of comprehensive ecological value and the weak ecological service function of the area were the results of these changes of the forestland and cultivated land to the construction land. Therefore, the change of land-use types of urban landscape had significant influences on the urban eco-environmental quality, especially the decrease of ecological environment indexes caused by the expansion of construction land. If there were no other types of land-use contributed to the ecological environment, the environmental quality of entire city would tend to be deteriorated continuously and the ecological environment would be worse and worse.