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Chinese Journal of Ecology ›› 2023, Vol. 42 ›› Issue (4): 946-955.doi: 10.13292/j.1000-4890.202304.012

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Spatiotemporal variation and driving forces of ecological environment of Giant Panda National Park in Sichuan Province based on geographical detector.

DONG Xin1,2,3*, CHEN Xiaorui3, LI Yanzhong4, GU Xiaodong5, YANG Cunjian1#br#

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  1. (1Key Laboratory of Southwest Land Resource Assessment and Monitoring, Ministry of Education, Chengdu 610066, China; 2China Key Laboratory of Southwest Wildlife Resources Protection, Ministry of Education, Nanchong 637009, Sichuan, China; 3College of Environmental Science and Engineering, China West Normal University, Nanchong 637009, Sichuan, China; 4School of Hydrology and Water Resources, Nanjing University of Information Science & Technology, Nanjing 210044, China; 5Forestry and Grassland Administration of Sichuan Province & Sichuan Giant Panda National Park Administration, Chengdu 610081, China).

  • Online:2023-04-03 Published:2023-04-06

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Abstract: The ecological environment of giant panda (Ailuropoda melanoleuca) habitat directly determines the reproduction and continuation of giant panda population. The quantitative evaluation of giant panda ecological environment and its influencing factors is of great scientific and application significance for the planning and management of Giant Panda National Park (GPNP) in the Qionglai-Daxiangling Mountain region of Sichuan Province. Based on the remote sensing ecological index (RSEI), we analyzed ecological environment status and its spatiotemporal variation of the study area before (2015) and after (2021) establishment of GPNP. The contribution of natural and social driving factors to the ecological environment status of the park was quantitatively analyzed by using the geographical detector. The results showed that: (1) The proportion of “excellent” and “good” grades of ecological environment status in the park was high (～70% in total), and most of them were distributed in the core zone of the GPNP. The overall ecological environment status of the region was good. (2) Compared with 2015, the RSEI levels of “excellent” and “poor” in 2021 were reduced and transferred to the other levels. The ecological quality of the region changed slightly as a whole, with obvious regional differences. The ecological environment status fluctuated greatly in the northwest region with higher elevation and the general control zone with more human activities in the southwest of the study area. (3) Natural factors were the main driving forces leading to the change of ecological environment status, followed by human factors. The order of contribution of the top six factors was: the normalized vegetation index (NDVI, 0.87) > dryness index (0.58) > wetness (0.54) > altitude (0.38) > land-cover type (0.37) > annual average temperature (0.36), with strong interactions between NDVI and the other factors. More attention should be paid to the most suitable areas, such as those of NDVI value of 0.875-1, altitude of 1720-2150 m, annual average temperature of 14.1-16.3 ℃, and those covered by coniferous forests. This study can provide an important reference for the evaluation and protection of giant panda habitat quality in the GPNP.


Key words: Giant Panda National Park, remote sensing ecological index, functional zone, Qionglai-Daxiangling region.