Resources Science ›› 2021, Vol. 43 ›› Issue (11): 2356-2368.doi: 10.18402/resci.2021.11.17

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Change of human activity intensity in ecological resettlement villages of Tibet

LI Zhennan1,2(), PAN Ying1, WU Junxi1(), ZHANG Yanjie3, ZHAO Zhongxu1,2, YU Chengqun1   

  1. 1. Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China
    2. University of Chinese Academy of Sciences, Beijing 100049, China
    3. College of Agronomy and Biological Sciences, Dali University, Dali 671003, China
  • Received:2020-09-14 Revised:2021-03-01 Online:2021-11-25 Published:2022-01-25
  • Contact: WU Junxi

Abstract:

In view of the significant changes of human activity intensity and ecological carrying capacity (EC) caused by ecological resettlement, this study analyzed the impact of ecological resettlement on human activity intensity of typical semi-agricultural and semi-pastoral villages in the Lhasa River Basin of Tibet by using the methods of ecological footprint (EF) and human appropriation of net primary production (HANPP). The results show that the per capita ecological footprint of Bailang Village the case study village decreased from 2.79 hm2 to 1.80 hm2, and the per capita ecological carrying capacity decreased from 4.44 hm2 to 2.47 hm2 from 2010 to 2019. The ecological footprint index (EFI) value decreased from 51.72% to 27.25%, implying that the sustainability of the village has been weakened. The HANPP increased from 20.17 g C/m2 to 34.01 g C/m2, that is, HANPP in percent of potential net primary production ranges from 10.09% to 12.0%. Land-use induced human appropriation of net primary production (HANPPluc) raised and exceeded biomass harvest (HANPPharv), and the semi-agricultural and semi-animal husbandry industries tend to develop in the direction of agricultural dominance. The valley plain area, which accounts for 11.46% of the village area, bears 72.96% of the HANPP after resettlement in 2019. The newly reclaimed cultivated land and artificial grassland reduce the grazing pressure of mountain grassland, make the intensity of human activities in the village more concentrated, and help to realize the coordinated improvement of ecosystem supply services and regulation services. The results of the two methods show that the resettlement has significantly enhanced the intensity of human activities in Bailang Village. Ecological footprint is more specific in the evaluation of sustainability while HANPP has more advantages in spatial analysis and ecosystem function analysis, and the two methods are complementary. In the subsequent resettlement program, the number of resettlement villages shall be determined according to the local ecological carrying capacity, and the coordinated improvement of ecosystem service function shall be realized through the rational allocation of supply services and regulation services between different terrain and vegetation types. By comparing the characteristics of the two evaluation methods, this study provides a reference for the selection of human activity intensity evaluation indicators in other regions. It also provides a scientific basis for the relocation and sustainable development of ecological resettlement sites in Tibet.

Key words: ecological footprint, ecological resettlement, human appropriation of net primary production, human activity intensity, sustainable development, Tibet