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Responses to the Impact of Drought on Carbon and Water Use Efficiency in Inner Mongolia

Author

Listed:
  • Geer Cheng

    (College of Desert Control Science and Engineering, Inner Mongolia Agricultural University, Hohhot 010018, China)

  • Tiejun Liu

    (Yinshanbeilu National Field Research Station of Desert Steppe Eco-Hydrological System, China Institute of Water Resources and Hydropower Research, Beijing 100038, China
    Institute of Water Resources for Pastoral Area Ministry of Water Resources, Hohhot 010020, China)

  • Sinan Wang

    (Yinshanbeilu National Field Research Station of Desert Steppe Eco-Hydrological System, China Institute of Water Resources and Hydropower Research, Beijing 100038, China
    Institute of Water Resources for Pastoral Area Ministry of Water Resources, Hohhot 010020, China)

  • Yingjie Wu

    (Yinshanbeilu National Field Research Station of Desert Steppe Eco-Hydrological System, China Institute of Water Resources and Hydropower Research, Beijing 100038, China
    Institute of Water Resources for Pastoral Area Ministry of Water Resources, Hohhot 010020, China)

  • Cunhou Zhang

    (Meteorological Information Centre, Inner Mongolia Autonomous Region Weather Bureau, Hohhot 010050, China)

Abstract

The dynamics of plants’ carbon and water use efficiency and their responses to drought are crucial to the sustainable development of arid and semi-arid environments. This study used trend analysis and partial correlation analysis to examine the carbon use efficiency (CUE) and water use efficiency (WUE) of Inner Mongolia’s vegetation from 2001 to 2020. MODIS data for gross primary productivity (GPP), net primary productivity (NPP), potential evapotranspiration (PET), evapotranspiration (ET), drought severity index (DSI), and plant type were used. Altered trends were observed for drought during 2001–2020 in the study area. The results revealed that 98.17% of the research area’s drought trend was from dry to wet and 1.83% was from wet to dry, and the regions with decreased drought regions were broadly dispersed. In 2001–2020, CUE in Inner Mongolia declined by 0.1%·year −1 , whereas WUE reduced by 0.008 g C·mm −1 ·m −2 ·year −1 , but the total change was not significant. CUE decreased from west to east, whereas WUE increased from southwest to northeast. DSI and CUE had the highest negative connection, accounting for 97.96% of the watershed area, and 71.6% passed the significance test. The correlation coefficients of DSI and WUE were spatially opposite to those of CUE and DSI. In total, 54.21% of the vegetation cover exhibited a negative connection with DSI. The CUE and WUE of different vegetation types in Inner Mongolia were negatively correlated with the DSI index except for grasslands (GRA). Drought in Inner Mongolia mostly influenced the CUE of different plant types, which had a higher negative correlation than WUE. The study’s findings can inform climate change research on Inner Mongolia’s carbon and water cycles.

Suggested Citation

  • Geer Cheng & Tiejun Liu & Sinan Wang & Yingjie Wu & Cunhou Zhang, 2023. "Responses to the Impact of Drought on Carbon and Water Use Efficiency in Inner Mongolia," Land, MDPI, vol. 12(3), pages 1-14, February.
    • Handle: RePEc:gam:jlands:v:12:y:2023:i:3:p:583-:d:1083563
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    References listed on IDEAS

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    1. Liu, Hao & Li, Huanhuan & Ning, Huifeng & Zhang, Xiaoxian & Li, Shuang & Pang, Jie & Wang, Guangshuai & Sun, Jingsheng, 2019. "Optimizing irrigation frequency and amount to balance yield, fruit quality and water use efficiency of greenhouse tomato," Agricultural Water Management, Elsevier, vol. 226(C).
    2. Yanfei Zhang & Zilong Liao & Xiaomin Xu & Wentao Liang & Zhenhua Han & Gang Ji & Rui Jiao, 2023. "Investigation of lake shrinkage attributed to climate change over the past 33 years in Inner Mongolia, China," Climatic Change, Springer, vol. 176(2), pages 1-19, February.
    3. Qi Zhang & Jinxin Lu & Xuexuan Xu & Xiuzi Ren & Junfeng Wang & Xiaohong Chai & Weiwei Wang, 2022. "Spatial and Temporal Patterns of Carbon and Water Use Efficiency on the Loess Plateau and Their Influencing Factors," Land, MDPI, vol. 12(1), pages 1-16, December.
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    1. Sinan Wang & Xigang Xing & Yingjie Wu & Jianying Guo & Mingyang Li & Bin Fu, 2024. "Seasonal Response of the NDVI to the SPEI at Different Time Scales in Yinshanbeilu, Inner Mongolia, China," Land, MDPI, vol. 13(4), pages 1-17, April.

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