【摘要】 基于遥感影像提取6个时期(1987年、1992年、1997年、2002年、2007年和2012年)盐城滨海湿地土地覆被变化信息,结合收集的资料,估算不同时期植物碳储量的变化,分析了植物碳储量的变化特征、原因及其对整个生态系统固碳的影响。结果表明,1987~2012年期间,盐城滨海湿地植物碳储量不断增长,净增长6.56×105t,年平均增长0.26×105t;土著种[獐茅(Aeluropus sinensis)、芦苇(Phragmites australis)和碱蓬(Suaeda salsa)]的碳储量所占比例不断下降,外来种互花米草(Spartina alterniflora)的碳储量所占比例显著上升,农田碳储量所占比例也有所上升;围垦和互花米草扩张是导致盐城滨海湿地植物碳储量变化的两个主要原因。更多还原

【Abstract】 This study estimated the vegetation carbon storage in 1987,1992,1997,2002 2007 and 2012 analyzed the characteristics the temporal variation and discussed its influence on carbon fixation of the whole ecosystem based on the land cover data of various landscape patterns with 5 year temporal stage and vegetation carbon density data calculated and collected from references.The results showed that vegetation carbon storage in Yancheng coastal wetlands had kept increasing,with a net increase of 6.56×105t and 0.26×105t/a on average.Ratios of carbon storage of native species(Aeluropus sinensis,Phragmites australis and Suaeda salsa)had been dropping,while ratio of carbon storage of the alien invasive species(Spartina alterniflora) showed an obvious increase,and the ratio of carbon storage of farmland had been increased slightly.Reclamation and alien invasions were the two most important reasons which resulted to the temporal variation of vegetation carbon storage in Yancheng coastal wetlands.The paper suggested that the effective and sustainable carbon fixation depended on both the natural law of salt marsh evolution and the exploitation rate of reclamation in Yancheng coastal wetlands.更多还原