Urban Development in China

Urban expansion profoundly alters the distribution and role of biodiversity. Many studies have shown that urbanization is an important reason for biodiversity reduction, alien species invasion and local extinction. The homogeneity of urban species composition also makes urban biodiversity facing important challenges. Fragmentation fragmentation, particularly due to infrastructure development, reduces the chance of biological dispersion and impacts on its ecological needs (e.g., access to specific habitats, adequate food and breeding areas). If ecosystems become too small or isolated, they may stop providing valuable services such as food and fresh water. Urban biodiversity is closely related to urbanization development intensity. The study found that moderate development of the city the highest biodiversity, city high strength city biodiversity minimum; in the same city in different stages of city development, city development in middle intensity area of the biological diversity was the highest, especially in the city land use change more severe peri urban areas or suburban areas, its biological diversity is not only higher than the city center area, and the natural ecosystem is significantly greater than the local 1. The distribution pattern of urban biodiversity is consistent with the moderate interference theory of traditional ecology [2.3]. The main reason may be: in the middle of the city area moderate disturbance intensity level, land use change and land use types formed severe heterogeneity of habitat, and diverse habitat to maintain higher biodiversity. Nevertheless, the effects of moderate interference mechanisms on the distribution patterns of urban biodiversity may be different for different species, and the impact on plant diversity may be much greater than that of other urban organisms [4]. City of the overall Chinese on the promotion of people's living standards improved, but there are also many problems in its development process, such as: city land resources are extensive encroachment on part of the city, overcrowding, excessive consumption of natural resources, the continued deterioration of the ecological environment etc..

What are the ecological impacts on semi-natural habitats and ecosystems of adjacent large developments (e.g. housing and airports) the city area (such as residential area, the airport will) to adjacent semi natural habitats and ecosystems have what ecological effects. Due to habitat fragmentation, often leaving habitat fragments like patches, called patch habitat. With the effect of fragmentation factors continuously increased, plaque area decreased, plaque data increased, the original landscape patches and the inverse back height change isolated from each other, and gradually shrink away, eventually developed into the habitat islands mentioned in the biogeography, resulting in a series of ecological effects or biological consequences in the population, community and ecosystem. Even the landscape at different levels. [5] habitat fragmentation reduces the dispersal of species