Acta Geographica Sinica ›› 2002, Vol. 57 ›› Issue (7s): 94-100.doi: 10.11821/xb20027s014

Previous Articles     Next Articles

The Spatial-temporal Dynamics of Marsh in the Sanjiang Plain

ZHANG Shuqing1, ZHUANG Yumin2, WANG Aihua1, HE Yanfen1   

  1. 1. Northeast Institute of Geography and Agricultural Ecology, CAS, Changchun 130012, China;
    2. Jilin Provincial Geologic Investigation Institute, Changchun 130061, China
  • Received:2002-05-15 Revised:2002-09-15 Online:2002-12-25 Published:2002-12-25
  • Supported by:

    Knowledge Innovation Project of CAS, No. KZCX2-308-3-5; No. INF105-SBD-1-24

Abstract:

Based on remote sensing data, the regional landscape dynamic patterns of wetland are firstly analyzed with the help of the quantitative analyzing models in landscape ecology in the Sanjiang Plain during the past decades. At the same time, in order to realize the situation of wetland shift into other types of land use, we take Fujin county as an example to make further analysis of land use. Results show that the wetland in the Sanjiang Plain has greatly reduced in the past decades with the decreasing rate up to 51.33% from 1980 to 1996 and 4.19% from 1996 to 2000. This shows that the reducing rate has become less and less. The fragmentation of wetland was serious from 1986 to 1996 and less serious from 1996 to 2000. This indicates that the wetland reclamation in the Sanjiang Plain has turned into wetland inning instead of wetland fragmentation. Paddy field and dry land are the basic land use types converted from wetland reclamation. The center of mass of wetland distribution has been moving from the northeast to the southwest. The wetland mass reclamation in the Sanjiang Plain resulted in regional climate change. The cold and humid climate in the Sanjiang Plain has become warm and dry. This makes the wetland in the northern part where the climate is cold and the wetland in the eastern part where the water is log become easier to be reclaimed. The paper also puts forward suggestions to protect and rehabilitate the wetland in the Sanjiang Plain.

Key words: marsh, wetland, spatial and temporal dynamics, dynamic characteristics, Sanjiang Plain, landscape pattern