SCIENTIA GEOGRAPHICA SINICA ›› 2019, Vol. 39 ›› Issue (7): 1155-1165.doi: 10.13249/j.cnki.sgs.2019.07.014

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Driving Forces Analysis and Landscape Succession Features of Coastal Wetland Both Outside and Inside Reclamation Areas in the Northern Liaodong Bay, China in Recent 40 Years

Yan Xiaolu1,2,Zhong Jingqiu1(),Han Zenglin1,Sun Caizhi1,Liu Miao2   

  1. 1. Center for Studies of Marine Economy and Sustainable Development, Liaoning Normal University, Dalian 116029, Liaoning, China
    2. Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, Liaoning, China
  • Received:2018-08-23 Revised:2019-01-11 Online:2019-07-10 Published:2019-07-10
  • Contact: Zhong Jingqiu E-mail:zjq@lnnu.edu.cn
  • Supported by:
    National Key Research and Development Program of China(2017YFC0505704);National Natural Science Foundation of China(41571122);Liaoning Planning Fund Project of Philosophy and Social Science(L17CJL002);Liaoning Planning Fund Project of Philosophy and Social Science(L17CJY003);Natural Science Foundation Guidance Program of Liaoning Province(20180551194);Social Science Federation 2019 Economic and Social Development of Liaoning Province(2019lslktjd-014);Education Fund Item of Liaoning Province(H201783631);Education Fund Item of Liaoning Province(WQ2019020);PhD Research Startup Foundation of Liaoning Normal University(BS2018L007)

Abstract:

Reclamation is considered to be an effective measure to solve the problem of land shortage in urban and industrial expansion. However, the extent and intensity of coastal development has caused serious damage to the coastal wetland ecosystem. Analyzing the characteristics and trends of coastal wetland evolution influenced by reclamation activities is of great significance for developing regional ecological coping strategies. Using Remote Sensing (RS) and Geographic Information System (GIS), this study took the northern area of Liaodong Bay as a case study to reveal shoreline changes and to delineate the paths and patterns of coastal wetland landscape succession both outside and inside reclamation areas. Results showed that: 1) The length of the coastline increased and showed a seaward advancing change in the period of research. In 1985-1993 and in 2002-2014, the coastal zone in the Northern Liaodong Bay experienced significant landward erosion and seaward expansion. The natural shorelines in the west banks of Daling River Estuary and Daliao River Estuary turn into artificial shorelines. 2) Reclamation has converted 85% of natural coastal wetlands into artificial coastal wetlands and non-wetland, landscape fragmentation increased. But in the 2002-2014, reed and intertidal salt marsh grew gradually outside reclamation area, the landscape diversity increased. 3) The traditional landscape succession over nearly four decades went from natural coastal wetlands to inland halophytes/reed swamps to aquaculture ponds/cultivated lands and then to built-up areas. Due to advanced reclamation and fast desalination technologies, the successional process was simplified and the time was shortened. 4) The evolution of regional landscape pattern is significantly influenced by different reclamation intensity and way. Strengthening the protection of the reverse succession from aquaculture ponds to inland halophytes on the west bank of the Daliao River and the wetland area on both sides of the Shuangtaizi Estuary is of great significance for the improvement of regional ecological environment.

Key words: coastal wetlands, reclamation area, landscape succession, Northern Liaodong Bay

CLC Number: 

  • K903