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Chinese Journal of Applied Ecology ›› 2023, Vol. 34 ›› Issue (8): 2215-2225.doi: 10.13287/j.1001-9332.202308.021

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Spatiotemporal variations of ecosystem security pattern in Horqin sandy dune meadow alternating area, China

MA Kuo1,2,3, HAO Lina1,2,3, TONG Xin1,2,3, DUAN Limin1,2,3, CAO Wenmei4, KANG Xueer1,2,3, LIU Xiaoyong5, LIU Tingxi1,2,3*   

  1. 1College of Water Conservancy and Civil Engineering, Inner Mongolia Agricultural University, Hohhot 010018, China;
    2Inner Mongolia Key Laboratory of Protection and Utilization of Water Resources, Hohhot 010018, China;
    3Collaborative Innovation Center for Integrated Management of Water Resources and Water Environment in the Inner Mongolia Reaches of the Yellow River, Hohhot 010018, China;
    4College of Civil and Architectural Engineering, North China University of Science and Technology, Tangshan 063210, Hebei, China;
    5Wulanchab Hydrological Survey Bureau, Wulanchabu 012000, Inner Mongolia, China
  • Received:2023-03-09 Accepted:2023-06-08 Online:2023-08-15 Published:2024-02-15

Abstract: The natural and geographical environment of ecologically fragile areas in northern China is complex. Due to heavy human disturbance and impacts of climate change, the sustainable development of ecosystems is facing serious challenges. Constructing ecological security pattern can provide decision-making basis for ecological environment protection in desertification areas. Based on land use change data of Horqin dune-meadow interphase area from 1985 to 2021, we identified ecological sources with the importance of ecosystem services and ecological sensitivity, and constructed the ecological security pattern using the minimum cumulative resistance model. We further analyzed the ecological security pattern and its development trend in 1985, 1995, 2005, 2015 and 2021, and explored the ecological spatial layout adjustment strategy. The results showed that the proportion of source area in the ecological security pattern of the study area was always small and scattered from 1985 to 2021, the network of ecological corridors was low, and the connectivity between ecological patches was lacking. The ecological security pattern had experienced a trend of deterioration first and then gradually improving. Ecological policies such as returning farmland to forest and grassland and afforestation had significantly improved the environmental security. We optimized the study area by combining the cultivated land suitability evaluation method. The ecological security pattern showed a spatial trend of ‘dual-core, scattered and semi-surrounded'. The results could provide references for the construction of county-scale ecological security pattern in ecologically fragile areas and the ecological management of Horqin sands.

Key words: land use change, ecological source, ecological corridor, ecological security pattern, Horqin sandy land dune meadow alternate area.