Study On Landscape Pattern Change And Ecological Construction Of Momoge Wetland

As the especial area between land and water, wetland is the important landscape covers type and ecosystem, which has the relation with human activity and land use. The change process of natural wetland landscape pattern has the great effect on other ecosystems and global climate.The research object of this thesis is Momoge wetland, which is the largest one in the droughty area of western jilin province. It has the prominent ecological functions on preventing sandiness, self-restraint water and adjusting climate. But because of the disturbance of nature and human factors, especially the exploitation of petroleum, the wetland has been developed to be a weak ecosystem gradually.Based on landscape ecology, this thesis analyses the landscape change driving forces and ecological construction countermeasures, with the content of Momoge wetland landscape pattern change about 15 years ago. And the main conclusions are underside:1. The climate, like rainfall and air temperature, is one of the driving forces for landscape change on Momoge wetland. The marsh and lake have the trend of being lessening. But the salt marsh trend to be larger.2. The reducing of wetland also has the relation with human movement. Water is the pivotal factor of wetland development. But the building reservoir and agriculture irrigation intercepted abundant water, which should enter into wetland. In addition, water pollution also expedites the speed of wetland degeneration.3. The landscape pattern indexes indicate that the amount and scope of marsh and lake wetland has been trend of reducing. The patch shape became complication, and the degree of landscape fragmentation aggravates. Simultaneity, the scope of salt marsh becomes bigger. The environment and functions of Momoge wetland go worsen.4. The rainfall and surface current are the primary modes of wetland water replenishment. The research indicates that the surface current depends on the rainfall and rainfall intensity. And the nutrient contents in the surface current are more than that in the rainfall.The thesis also gives some suggestions of landscape ecological construction to assort with the contradiction of economic development and environment protection and achieve the continuous development of Momoge wetland.