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Assessing the Impacts of Urbanization and Climate Change on NPP Under Different Habitat Quality Conditions over the Last Two Decades in the Tibetan Plateau, China

Author

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  • Tanlong Xia

    (School of Civil Engineering and Geomatics, Shandong University of Technology, Zibo 255000, China
    These authors contributed equally to this work.)

  • Liusheng Han

    (School of Civil Engineering and Geomatics, Shandong University of Technology, Zibo 255000, China
    These authors contributed equally to this work.)

  • Chen Ren

    (School of Civil Engineering and Geomatics, Shandong University of Technology, Zibo 255000, China)

  • Qian Xu

    (School of Civil Engineering and Geomatics, Shandong University of Technology, Zibo 255000, China)

  • Dafu Zhang

    (School of Civil Engineering and Geomatics, Shandong University of Technology, Zibo 255000, China)

  • Guangwei Sun

    (School of Civil Engineering and Geomatics, Shandong University of Technology, Zibo 255000, China)

  • Zhaohui Feng

    (College of Urban and Environmental Sciences, Peking University, Beijing 100871, China)

Abstract

The processes of urbanization and climate change have exerted a marked influence on net primary productivity (NPP). However, the underlying mechanisms that drive these effects remain intricate and insufficiently understood. The processes of urbanization and climate change both have an adverse effect on habitat quality (HQ) and biodiversity loss. The HQ has a direct influence on the health and stability of ecosystems, which regulate the level of NPP. A higher HQ is associated with stronger NPP. Now, the quantification and assessment of the impacts of climate change and urbanization on NPP are still challenging because of the various driving factors and the intricate mechanisms influencing the production of terrestrial vegetation. Therefore, a new perspective was adopted to study the effects of urbanization and climate change on NPP in the Qinghai–Tibet Plateau in China during 2000–2020. The spatiotemporal analysis method was employed to investigate the impact of the night light urbanization index and climate factors on NPP in different HQ regions (the HQ is divided into five levels, with each area type corresponding to a specific HQ level). Then, the coupled coordination model (CCD) was used to analyze the coupling coordination relationship between NPP and HQ. Finally, the relative contribution of urbanization and climate change to NPP was studied using scenario simulation. The results showed that (1) NPP in the whole Tibetan Plateau increased very little, with an average growth rate of 0.42 g C m⁻ 2 per year. (2) It was surprising to find that NPP in urban areas did not decline significantly as a result of urbanization. However, there was a notable decline in NPP in higher HQ areas. (3) The mean contribution of urbanization to NPP change was found to be 17%, while the mean contribution of climate change and other factors to NPP change was 69% and 14%, respectively. These findings provide valuable insights into the interactions between human development and environmental factors, enhancing our comprehension of their role in the Tibetan Plateau’s carbon cycle.

Suggested Citation

  • Tanlong Xia & Liusheng Han & Chen Ren & Qian Xu & Dafu Zhang & Guangwei Sun & Zhaohui Feng, 2024. "Assessing the Impacts of Urbanization and Climate Change on NPP Under Different Habitat Quality Conditions over the Last Two Decades in the Tibetan Plateau, China," Land, MDPI, vol. 13(12), pages 1-26, December.
    • Handle: RePEc:gam:jlands:v:13:y:2024:i:12:p:2139-:d:1539899
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    References listed on IDEAS

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