%0 Journal Article %A Jianguo LI %A Lijie PU %A Caiyao XU %A Xinjian CHEN %A Yunfeng ZHANG %A Fangfang CAI %T The changes and dynamics of coastal wetlands and reclamation areas in central Jiangsu from 1977 to 2014 %D 2015 %R 10.11821/dlxb201501002 %J Acta Geographica Sinica %P 17-28 %V 70 %N 1 %X

Five remote sensing images (1977, 1984, 2000, 2007 and 2014) were obtained to study the spatial dynamics of coastal wetlands and reclamation area in central Jiangsu province. The results indicated that most of the coastal wetlands showed an accretion trend from the south of Sheyang estuary, while there still existed some erosion phenomena in the past 40 years. The mean rate of accretion/erosion of Jiangsu coastal wetlands was ±20 m per year, and the highest value was observed at Dongtai and Yangkou ports. Meanwhile, the reclamation rate was significantly higher than the accretion ones, and the former kept a level of 50 m per year. In addition, the key ecological areas of Jiangsu coastal wetlands reduced rapidly from 1977 to 2014, which can be found from the shrinkage of natural halophytic vegetation in the southern part of Sheyang County and the whole part of Dafeng County. It was found in field surveys that the evolution pattern of reclamation in coastal wetlands was in the order of bare flat → halophytic vegetation → aquaculture pond → cropland → built-up land. However, with the aid of new technology, the period of evolution pattern was shortened. Moreover, the development of coastal wetlands has been intensified due to reclamation activities. The hotspots of reclamation were presented at major ports and central towns.

%U https://www.geog.com.cn/EN/10.11821/dlxb201501002