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Quantifying and Mapping Human Appropriation of Net Primary Productivity in Qinghai Grasslands in China

Author

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  • Xiaotao Huang

    (Key Laboratory of Restoration Ecology for Cold Regions Laboratory in Qinghai, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining 810008, China
    Key Laboratory of Adaptation and Evolution of Plateau Biota, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining 810008, China
    University of the Chinese Academy of Sciences, Beijing 100049, China)

  • Yongsheng Yang

    (Key Laboratory of Restoration Ecology for Cold Regions Laboratory in Qinghai, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining 810008, China
    Key Laboratory of Adaptation and Evolution of Plateau Biota, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining 810008, China)

  • Chunbo Chen

    (University of the Chinese Academy of Sciences, Beijing 100049, China
    State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China)

  • Hongfei Zhao

    (University of the Chinese Academy of Sciences, Beijing 100049, China
    College of Natural Resources and Environment, Northwest A&F University, Yangling, Xianyang 712100, China)

  • Buqing Yao

    (Key Laboratory of Restoration Ecology for Cold Regions Laboratory in Qinghai, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining 810008, China
    Key Laboratory of Adaptation and Evolution of Plateau Biota, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining 810008, China)

  • Zhen Ma

    (Key Laboratory of Restoration Ecology for Cold Regions Laboratory in Qinghai, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining 810008, China
    Key Laboratory of Adaptation and Evolution of Plateau Biota, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining 810008, China)

  • Li Ma

    (Key Laboratory of Restoration Ecology for Cold Regions Laboratory in Qinghai, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining 810008, China
    Key Laboratory of Adaptation and Evolution of Plateau Biota, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining 810008, China)

  • Huakun Zhou

    (Key Laboratory of Restoration Ecology for Cold Regions Laboratory in Qinghai, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining 810008, China
    Key Laboratory of Adaptation and Evolution of Plateau Biota, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining 810008, China)

Abstract

Human appropriation of net primary productivity (HANPP) is an important indicator for assessing ecological sustainability. However, the spatiotemporal dynamics of HANPP in the Qinghai grasslands remain unclear. In this study, we used the spatially explicit Biome-BGCMuSo model to quantify and map HANPP in the Qinghai grasslands from 1979 to 2018. Generally, the actual net primary productivity (NPP act ) was slightly lower than the potential net primary productivity (NPP pot ), and the difference between the NPP pot and NPP act increased slightly over time. From 1979 to 2001, the NPP pot and NPP act were relatively stable; however, from 2001 to 2018, both showed significant fluctuating upward trends. From 1979 to 2018, HANPP showed a fluctuating upward trend from 6.36 to 31.85 gC/m 2 /yr, with an average increase of 2.14 gC/m 2 /yr. The average HANPP was 16.90 gC/m 2 /yr, which represented 18.80% of the NPP pot of Qinghai grasslands. High HANPP mainly occurred in eastern Qinghai, whereas it was low in central and western Qinghai. Conversely, from 1979 to 2018, the HANPP efficiency decreased in a fluctuating way from 98.28% to 72.05%, with an average annual decrease of 0.66%. The interannual variations in the HANPP efficiency and harvest were negatively correlated, with a correlation coefficient of −0.46 ( p < 0.01). The average HANPP efficiency was 85.33%, and the values in most grids were between 80% and 100%, being relatively low in southern and eastern Qinghai. In rare cases, the HANPP efficiency was greater than 1. This study clarifies the details of spatiotemporal dynamics of HANPP in the Qinghai grasslands and indicates the need to optimize local management of grassland resources to ensure future ecological sustainability.

Suggested Citation

  • Xiaotao Huang & Yongsheng Yang & Chunbo Chen & Hongfei Zhao & Buqing Yao & Zhen Ma & Li Ma & Huakun Zhou, 2022. "Quantifying and Mapping Human Appropriation of Net Primary Productivity in Qinghai Grasslands in China," Agriculture, MDPI, vol. 12(4), pages 1-13, March.
    • Handle: RePEc:gam:jagris:v:12:y:2022:i:4:p:483-:d:782736
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    References listed on IDEAS

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    Cited by:

    1. Tian Zhang & Jian Peng & Xiaoshu Cao, 2023. "China’s Urban and Rural Development Significantly Affects the Pattern of Human Appropriation of Net Primary Production," Land, MDPI, vol. 12(5), pages 1-21, May.
    2. Yina Ma & Shixiong Wang & Qing Zhang & Kun Guo & Yuejun He & Danmei Chen & Mingzhen Sui & Guangqi Zhang & Lipeng Zang & Qingfu Liu, 2022. "Aerial Seeding Promotes the Restoration of Ecosystem Health in Mu Us Sandy Grasslands in China," Agriculture, MDPI, vol. 12(8), pages 1-13, August.

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