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Spatial and temporal change patterns of net primary productivity and its response to climate change in the Qinghai-Tibet Plateau of China from 2000 to 2015

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Abstract

The vegetation ecosystem of the Qinghai-Tibet Plateau in China, considered to be the “natural laboratory” of climate change in the world, has undergone profound changes under the stress of global change. Herein, we analyzed and discussed the spatial-temporal change patterns and the driving mechanisms of net primary productivity (NPP) in the Qinghai-Tibet Plateau from 2000 to 2015 based on the gravity center and correlation coefficient models. Subsequently, we quantitatively distinguished the relative effects of climate change (such as precipitation, temperature and evapotranspiration) and human activities (such as grazing and ecological construction) on the NPP changes using scenario analysis and Miami model based on the MOD17A3 and meteorological data. The average annual NPP in the Qinghai-Tibet Plateau showed a decreasing trend from the southeast to the northwest during 2000–2015. With respect to the inter-annual changes, the average annual NPP exhibited a fluctuating upward trend from 2000 to 2015, with a steep increase observed in 2005 and a high fluctuation observed from 2005 to 2015. In the Qinghai-Tibet Plateau, the regions with the increase in NPP (change rate higher than 10%) were mainly concentrated in the Three-River Source Region, the northern Hengduan Mountains, the middle and lower reaches of the Yarlung Zangbo River, and the eastern parts of the North Tibet Plateau, whereas the regions with the decrease in NPP (change rate lower than −10%) were mainly concentrated in the upper reaches of the Yarlung Zangbo River and the Ali Plateau. The gravity center of NPP in the Qinghai-Tibet Plateau has moved southwestward during 2000–2015, indicating that the increment and growth rate of NPP in the southwestern part is greater than those of NPP in the northeastern part. Further, a significant correlation was observed between NPP and climate factors in the Qinghai-Tibet Plateau. The regions exhibiting a significant correlation between NPP and precipitation were mainly located in the central and eastern Qinghai-Tibet Plateau, and the regions exhibiting a significant correlation between NPP and temperature were mainly located in the southern and eastern Qinghai-Tibet Plateau. Furthermore, the relative effects of climate change and human activities on the NPP changes in the Qinghai-Tibet Plateau exhibited significant spatial differences in three types of zones, i.e., the climate change-dominant zone, the human activity-dominant zone, and the climate change and human activity interaction zone. These research results can provide theoretical and methodological supports to reveal the driving mechanisms of the regional ecosystems to the global change in the Qinghai-Tibet Plateau.

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Acknowledgements

This work was supported by the Natural Science Foundation of Shandong Province (ZR2018BD001), the Project of Shandong Province Higher Educational Science and Technology Program (J18KA181), the Key Research Program of Frontier Science of Chinese Academy of Sciences (QYZDY-SSW-DQC007), the Open Fund of Key Laboratory of Geographic Information Science (Ministry of Education), East China Normal University (KLGIS2017A02), the Open Fund of State Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University (17I04), the Open Fund of Key Laboratory of Geomatics and Digital Technology of Shandong Province, and the National Key R&D Program of China (2017YFA0604804).

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Authors and Affiliations

  1. School of Civil Architectural Engineering, Shandong University of Technology, Zibo, 255000, China

    Bing Guo, Baomin Han, Shuting Chen, Yue Liu, Xiao Yang, Tianli He, Xi Chen, Chunting Liu & Rui Gong

  2. Key Laboratory of Geomatics and Digital Technology of Shandong Province, Qingdao, 266590, China

    Bing Guo

  3. State Key Laboratory of Resources and Environmental Information System, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, 100101, China

    Bing Guo & Fei Yang

  4. State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University, Wuhan, 430079, China

    Bing Guo

  5. Key Laboratory of Geographic Information Science (Ministry of Education), East China Normal University, Shanghai, 200241, China

    Bing Guo

  6. Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beijing, 100101, China

    Wenqian Zang

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  1. Bing Guo
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  2. Wenqian Zang
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  3. Fei Yang
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  4. Baomin Han
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  5. Shuting Chen
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  6. Yue Liu
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  7. Xiao Yang
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  8. Tianli He
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  9. Xi Chen
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  10. Chunting Liu
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  11. Rui Gong
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Correspondence to Baomin Han.

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Guo, B., Zang, W., Yang, F. et al. Spatial and temporal change patterns of net primary productivity and its response to climate change in the Qinghai-Tibet Plateau of China from 2000 to 2015. J. Arid Land 12, 1–17 (2020). https://doi.org/10.1007/s40333-019-0070-1

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  • DOI: https://doi.org/10.1007/s40333-019-0070-1

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