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The Analysis of NPP Changes under Different Climatic Zones and under Different Land Use Types in Henan Province, 2001–2020

Author

Listed:
  • Yi Cao

    (Faculty of Land Resource Engineering, Kunming University of Science and Technology, Kunming 650093, China)

  • Xingping Wen

    (Faculty of Land Resource Engineering, Kunming University of Science and Technology, Kunming 650093, China
    Key Laboratory of Geohazard Forecast and Geoecological Restoration in Plateau Mountainous Area, Ministry of Natural Resources of the People’s Republic of China, Kunming 650093, China
    Yunnan Key Laboratory of Geohazard Forecast and Geoecological Restoration in Plateau Mountainous Area, Kunming 650216, China)

  • Yixiao Wang

    (Faculty of Land Resource Engineering, Kunming University of Science and Technology, Kunming 650093, China)

  • Xuanting Zhao

    (Faculty of Land Resource Engineering, Kunming University of Science and Technology, Kunming 650093, China)

Abstract

Net Primary Productivity (NPP) is a crucial indicator of ecological environment quality. To better understand the carbon absorption and carbon cycling capabilities of Henan Province, this study investigates the trends and driving factors of NPP across different climatic zones and land use types. The Theil–Sen Median trend analysis method and the Mann–Kendall trend test are employed to monitor NPP changes from 2001 to 2020. The average annual NPP in Henan Province during this period was 414.61 gC·m −2 ·year −1 , showing a significant increasing trend with a growth rate of 3.73 gC·m −2 ·year −1 . Spatially, both the annual average NPP and its increase rate were higher in the western part of Henan compared to the eastern part, and NPP variability was more stable in the southern region than in the northern region. By classifying climatic zones and using the Geodetector method to assess NPP sensitivity to natural factors, the results show that climate and vegetation factors jointly influence NPP variations, with annual precipitation being the primary natural factor affecting NPP trends in Henan Province from 2001 to 2020. By analyzing the NPP gain and loss matrix, the impact of land use changes on NPP was evaluated. Forests had the highest average annual NPP at 483.52 gC·m −2 ·year −1 , and the conversion of arable land to urban areas was identified as the primary land change type leading to NPP reductions. In the subtropical zone of Henan, forests, croplands, and grasslands exhibited higher NPP values and increase rates compared to those in the warm belt. This study provides new insights into the spatial variation of NPP caused by changes in climatic zones and land use types.

Suggested Citation

  • Yi Cao & Xingping Wen & Yixiao Wang & Xuanting Zhao, 2024. "The Analysis of NPP Changes under Different Climatic Zones and under Different Land Use Types in Henan Province, 2001–2020," Sustainability, MDPI, vol. 16(18), pages 1-22, September.
  • Handle: RePEc:gam:jsusta:v:16:y:2024:i:18:p:8096-:d:1479303
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    References listed on IDEAS

    as
    1. Vicky Espinoza & Lorenzo Ade Booth & Joshua H. Viers, 2023. "Land Use Misclassification Results in Water Use, Economic Value, and GHG Emission Discrepancies in California’s High-Intensity Agriculture Region," Sustainability, MDPI, vol. 15(8), pages 1-17, April.
    2. Linye Zhu & Mingming Shi & Deqin Fan & Kun Tu & Wenbin Sun, 2023. "Analysis of Changes in Vegetation Carbon Storage and Net Primary Productivity as Influenced by Land-Cover Change in Inner Mongolia, China," Sustainability, MDPI, vol. 15(6), pages 1-18, March.
    3. Dandan Zhao & Wenyue Jia & Jiping Liu, 2023. "Dynamic Changes and Driving Mechanisms of Net Primary Production (NPP) in a Semi-Arid Region of China," Sustainability, MDPI, vol. 15(15), pages 1-12, August.
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