双台河口保护区湿地景观格局变化研究

在分析国内外主要湿地分类系统、总结有关湿地分类方法的基础上,结合双台河口保护区的实际情况,建立了适合研究区的湿地景观分类体系。利用1988年、2001年和2007年三个时相的Landsat TM/ETM+遥感影像数据,分析研究区内湿地景观类型的变化特点,以及影响研究区湿地景观格局变化的主要因素。分析结果表明:从1988年到2007年,研究区内以天然湿地为主,但天然湿地面积呈减少趋势,比重从72.68%降到56.64%;人工湿地面积比重逐渐上升,从2.93%上升到11.86%,增加量为1988年人工湿地面积的3.04倍;非湿地面积的比重从24.38%变化到31.50%。人为因素已成为研究区湿地景观格局变化的主导因素。

Study on the Changes in Wetland Landscape Pattern of Shuangtai Estuary Reserve

Based on the analysis and the summary of the main wetland classification systems at home and abroad and combining with the actual situation of Shuangtai estuary reserve,the paper establishes the wetland classification system that is suitable for the study area.By using the remote sensing images of Landsat TM/ETM+ respectively in 1988,2001 and2007,the paper analyzes the changing characteristics and the main driving factors.The results indicates that from 1988 to 2007 the natural wetlands constituted the main body of the study area,but the natural wetlands showed a trend of degradation and disappearance and its area percentage of the study area decreased from 72.68% to 56.64%;the area percentage of the constructed wetlands increased from 2.93% to 11.86%,and the area increased amount was 3.04 times of its area in 1988;the area percentage of the non-wetlands increased from 24.38% to 31.50%.The human driving force has been the main factor for the changes in wetlands landscape pattern of the study area.