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hina has been undergoing a period of economic reform and expansion since the late 1970s, accompanied by rapid and widespread urbanization. During the early 1980s, 18% of China's population lived in cities, but this rose to 39% by 2003, while the number of cities increased from 190 to 660 (including about 170 cities with a population greater than 1 million)(More)
Negative air ions are natural components of the air we breathe. Forests are the main continuous natural source of negative air ions (NAI). The spatio-temporal patterns of negative air ions were explored in Shanghai, based on monthly monitoring in 15 parks from March 2009 to February 2010. In each park, sampling sites were selected in forests and open(More)
Chongqing Municipality, located on the upper reaches of the Yangtze River, is one of China’s four largest megacities, comparable with Shanghai, Beijing, and Tianjin. In recent years, Chongqing and its surroundings have been experiencing severe environmental problems, such as urbanization, pollution, and deforestation, due to the rapid economic development(More)
Urbanization has resulted in obvious changes in plant species diversity. We analyzed the dynamics of ruderal species diversity in Harbin over the past half century using historical data collected in 1955 and data of the present spatial distribution in 2010–2011. The results show that, the number of ruderal species decreased from 611 to 175 with remarkable(More)
Paddy fields surrounded by forests are characteristic of the rural landscapes in East Asia. These characteristic landscapes are maintained by agricultural activities; recently, however, local and regional changes in economic and social systems have resulted in their deterioration. In order to conserve these landscapes, the diversity of land-use systems(More)
Evergreen broad-leaved forests (EBLFs, lucidophyllous forests) are vegetation types characteristic of East Asia. The extent of EBLFs has decreased significantly due to long-term anthropogenic disturbance, and remnant EBLFs in urban area are rare and important landscape types contributing to biodiversity and sustainable development. This study focuses on(More)
Longfeng wetland reserve is one of China's largest urban wetland and plays a significant role in the sustainable development of the urban eco-environment in Daqing city. However, The landscape pattern of Longfeng wetland reserve has undergone a significant change as a result of accelerated urbanization. Remote sensing data (1979, 1989, 2001 and 2008) and(More)
With the development of urban residential suburbanization, the urban living space is the basic type of urban society and the important function, living space extension and ecological environment relationship, which is are paid more attention by scholars. This paper does research on quantitatively measure in urban spatial extension and ecological environment(More)
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