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Dynamic Response and Adaptation of Grassland Ecosystems in the Three-River Headwaters Region under Changing Environment: A Review

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  • Yaowen Kou

    (Institute of Geography and Resources Science, Sichuan Normal University, Chengdu 610101, China
    Sustainable Development Research Center of Resource and Environment of Western Sichuan, Chengdu 610066, China)

  • Quanzhi Yuan

    (Institute of Geography and Resources Science, Sichuan Normal University, Chengdu 610101, China
    Sustainable Development Research Center of Resource and Environment of Western Sichuan, Chengdu 610066, China)

  • Xiangshou Dong

    (Institute of Geography and Resources Science, Sichuan Normal University, Chengdu 610101, China
    Sustainable Development Research Center of Resource and Environment of Western Sichuan, Chengdu 610066, China)

  • Shujun Li

    (Institute of Geography and Resources Science, Sichuan Normal University, Chengdu 610101, China
    Sustainable Development Research Center of Resource and Environment of Western Sichuan, Chengdu 610066, China)

  • Wei Deng

    (Institute of Geography and Resources Science, Sichuan Normal University, Chengdu 610101, China
    Sustainable Development Research Center of Resource and Environment of Western Sichuan, Chengdu 610066, China)

  • Ping Ren

    (Institute of Geography and Resources Science, Sichuan Normal University, Chengdu 610101, China
    Key Lab of Land Resources Evaluation and Monitoring in Southwest, Ministry of Education, Sichuan Normal University, Chengdu 610066, China)

Abstract

The Three-River Headwaters Region (TRHR) is crucial to the sustainable development of China and Southeast Asia. The sustainability of grassland ecosystems in the region has been seriously challenged in recent years. This paper reviewed the changes in the grasslands of the TRHR and their responses to climate change and human activities. The review showed that accurate monitoring of grassland ecological information is the basis for effective management. Although alpine grassland coverage and the above-ground biomass of the alpine grassland have generally increased in the region over the past 30 years, the degradation has not been fundamentally curbed. Grassland degradation substantially reduced topsoil nutrients and affected their distribution, deteriorated soil moisture conditions, and aggravated soil erosion. Grassland degradation led to loss of productivity and species diversity, and this is already harming the well-being of pastoralists. The “warm and wet” trend of the climate promoted the restoration of alpine grasslands, but widespread overgrazing is considered as one of the main reasons for grassland degradation, and related differences still exist. Since 2000, the grassland restoration policy has achieved fruitful results, but the formulation of the policy still needs to integrate market logic effectively and strengthen the understanding of the relationship between ecological protection and cultural protection. In addition, appropriate human intervention mechanisms are urgently needed due to the uncertainty of future climate change. For mildly and moderately degraded grassland, traditional methods are applicable. However, the severely degraded “black soil beach” needs to be restored by artificial seeding, and the stability of the plant–soil system needs to be emphasized to establish a relatively stable community to prevent secondary degradation.

Suggested Citation

  • Yaowen Kou & Quanzhi Yuan & Xiangshou Dong & Shujun Li & Wei Deng & Ping Ren, 2023. "Dynamic Response and Adaptation of Grassland Ecosystems in the Three-River Headwaters Region under Changing Environment: A Review," IJERPH, MDPI, vol. 20(5), pages 1-30, February.
  • Handle: RePEc:gam:jijerp:v:20:y:2023:i:5:p:4220-:d:1081755
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    References listed on IDEAS

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