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Chinese Journal of Applied Ecology ›› 2020, Vol. 31 ›› Issue (10): 3499-3508.doi: 10.13287/j.1001-9332.202010.013

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Characteristics and driving forces of wetland landscape pattern evolution of the city belt along the Yellow River in Ningxia, China

GAO Zu-qiao1, BAI Yong-ping1*, ZHOU Liang2,3, QIAO Fu-wei1, SONG Long-jun1, CHEN Xiao-ning1   

  1. 1College of Geographic and Environmental Science, Northwest Normal University, Lanzhou 730070, China;
    2Faculty of Geomatics, Lanzhou Jiaotong University, Lanzhou 730070, China;
    3State Key Laboratory of Resources and Environmental Information System, Institute of Geographical Science and Natural Resource Research, Chinese Aca-demy of Sciences, Beijing 100101, China
  • Received:2020-06-10 Accepted:2020-07-28 Online:2020-10-15 Published:2021-04-15
  • Contact: * E-mail: baiyp@nwnu.edu.cn
  • Supported by:
    National Natural Science Foundation of China (41701173, 40771054, 41961027), the Key Research and Development Project of Gansu Province (18YF1FA052), the Ministry of Education Humanities and Social Sciences Research Youth Foundation (17YJCZH268), the General Project of the “Belt and Road” Research in Gansu Province (LDBR2018-017), and the Key Project of the Gansu Provincial Government Decision Advisory Committee in 2019.

Abstract: Wetlands are one of the most productive ecosystems in the world, with functions of water purification, climate regulation, and carbon sinks. Due to the stresses caused by human social development and changes of natural conditions, wetlands have been seriously damaged. We examined the evolutionary law of landscape pattern of wetland along the Yellow River, and acquainted the current situation of wetland resources and dynamic change. Based on satellite images of year 2000, 2009, and 2018 from Landsat, we used landscape indices and geographic detectors to quantitatively analyze the characteristics and driving forces of wetland landscape pattern evolution of the city belt along the Yellow River in Ningxia from 2000 to 2018. The results showed that the wetland area of the city belt along the Yellow River in Ningxia enlarged first and then decreased from 2000 to 2018. The wetland area increased by 52.2 km2 in the early stage of the study with an increasing rate of 8.2%, and decreased by 26.8 km2 with a reduction rate of 3.9% in the later stage. The wetland was mainly transformed to construction land and unused land, with transfer out area being 166.7 and 158.4 km2 respectively. New wetland was mainly transformed from unused land, forest, and grassland, with an area of 543.1 km2. The fragmentation degree of wetland landscape in city belt was increasing, the balanced distribution of all kinds of wetlands was gradually strengthened, the landscape diversity was increasing, and the dominant landscape types were gradually weakening. Natural factors and socio-economic factors jointly affected the evolution of wetland landscape pattern in city belt. Among all socio-economic factors population was the most important one. Among natural factors, precipitation and temperature were important. Other driving factors were relatively weak, but could not be ignored.

Key words: wetland, landscape pattern, high quality development in the basin, arid area, city belt