辽河三角洲沼泽湿地时空变化及其生态效应

在遥感和地理信息系统的支持下，应用景观生态学的理论和方法，通过分析景观类型的斑块和面积大小、形状特征、主要景观及其相关土地覆盖类型间的转化关系，定量分析和研究了1986—2000年辽河三角洲沼泽湿地景观的动态变化．研究表明，15年来，辽河三角洲沼泽湿地变化的总趋势是沼泽面积变小，部分小面积的沼泽转化为水田或退化成草地等土地覆盖类型．本区沼泽景观发生变化的最主要原因是人类对沼泽的开垦．分析了沼泽湿地的动态变化引起的生态效应．

Space-time change of marsh wetland in Liaohe delta area and its ecological effect

Based on remote sensing technology and GIS and employing the method and theory of landscape ecology,analyzed by ration and studied the dynamic change of marsh landscape in Liaohe delta area from 1986 to 2000 through analyzing the patches of landscape type, size and shape characteristics of the patches, and the transforming relationship between the major landscape and its related land cover types .The research indicated that the general trend of marshland in Liaohe delta was that the area was getting smaller: some marshland was reclaimed into paddy, some degenerated into grassland. During the transforming from marshland to other land cover types, the greater patches had been reserved. This article argued that the major driving force of marshland area decreasing is not the climate change which had made the marshland degenerate into grassland, the main reason that lead to the change of marsh landscape in the area is the reclamation of marshland by mankind. Finally the article analyzed the ecological effect aroused by the dynamic change of marshland.