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A Study of Carbon Stock Changes in the Alpine Grassland Ecosystem of Zoigê, China, 2000–2020

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  • Rui Qu

    (State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059, China
    College of Earth Sciences, Chengdu University of Technology, Chengdu 610059, China)

  • Li He

    (State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059, China
    College of Tourism and Urban-Rural Planning, Chengdu University of Technology, Chengdu 610059, China)

  • Zhengwei He

    (State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059, China
    College of Earth Sciences, Chengdu University of Technology, Chengdu 610059, China)

  • Bing Wang

    (State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059, China
    College of Earth Sciences, Chengdu University of Technology, Chengdu 610059, China)

  • Pengyi Lyu

    (State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059, China
    College of Earth Sciences, Chengdu University of Technology, Chengdu 610059, China)

  • Jiaxian Wang

    (State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059, China
    College of Earth Sciences, Chengdu University of Technology, Chengdu 610059, China)

  • Guichuan Kang

    (State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059, China
    College of Earth Sciences, Chengdu University of Technology, Chengdu 610059, China)

  • Wenqian Bai

    (State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059, China
    College of Earth Sciences, Chengdu University of Technology, Chengdu 610059, China)

Abstract

Terrestrial carbon sequestration capacity is an important indicator of ecosystem service function, and the carbon storage value can reflect the climate regulation capacity of the regional ecological environment. The Zoigê alpine grassland is a representative area of the Qinghai-Tibet Plateau grassland ecosystem, with carbon sequestration types such as alpine grassland and marsh meadow and also an important water-conserving area in the upper reaches of the Yangtze River and the Yellow River. In this study, based on the land use/cover change pattern of the Zoigê alpine grassland region from 2000 to 2020, the carbon density coefficients corrected by the regional average annual precipitation and temperature factors were used to assess the carbon stocks of the Zoigê alpine grassland for three periods from 2000 to 2020 using the InVEST model. The results showed that the carbon stocks of the Zoigê alpine grassland region were 786.19 Tg, 780.02 Tg, and 775.22 Tg in 2000, 2010, and 2020, respectively, with a cumulative loss of 10.97 Tg and carbon densities of 183.70 t/ha, 182.26 t/ha, and 181.14 t/ha, showing a decreasing trend year by year. The carbon stock of the grassland ecosystem is the absolute contributor to the regional carbon stock, and the carbon stock accounts for 75.28% of the total carbon stock. The increase in the cultivated land area with a lower carbon density and the decrease in the grassland area with a higher carbon density are the main factors leading to the decrease in the carbon stock in the regional ecosystem of the Zoigê alpine grassland.

Suggested Citation

  • Rui Qu & Li He & Zhengwei He & Bing Wang & Pengyi Lyu & Jiaxian Wang & Guichuan Kang & Wenqian Bai, 2022. "A Study of Carbon Stock Changes in the Alpine Grassland Ecosystem of Zoigê, China, 2000–2020," Land, MDPI, vol. 11(8), pages 1-15, August.
    • Handle: RePEc:gam:jlands:v:11:y:2022:i:8:p:1232-:d:879933
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    1. Haotian Zhang & Jianheng Wang & Yichen Zhang & Hongyu Qian & Zhiyi Xie & Yufu Hu & Yongjie Huang & Chuan Zhao & Wanli Cheng & Xiaoxuan Feng & Haoran Qi & Siqi Du, 2023. "Soil Organic Carbon Dynamics and Influencing Factors in the Zoige Alpine Wetland from the 1980s to 2020 Based on a Random Forest Model," Land, MDPI, vol. 12(10), pages 1-20, October.

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