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Effects of intrinsic water-use efficiency and environmental factors on radial growth of Populus euphratica, Taklamakan Desert, China

Author

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  • Abdureyim, Anwar
  • Wan, Yanbo
  • Dai, Yue
  • Flora, Erkin
  • Shi, Qingdong

Abstract

Climate warming and human activities have altered water resource distribution in desert areas, accelerated water infiltration and evaporation, disrupted the water cycle, and increased drought stress in riparian forests. However, the effects of climate varying environmental conditions on intrinsic water use efficiency (iWUE) and tree growth in Populus euphratica Oliv. remain unexplored. Using tree-ring width and δ13C composition data, we analyzed the growth and iWUE of P. euphratica across three sample plots with varying groundwater depths in the Daliyaboyi Oasis. We found that P. euphratica basal area increment (BAI) and iWUE significantly increased across all sampling plots from 1980 to 2003 with no significant changes from 2004 to 2022. In the shallow-groundwater sample plot, P. euphratica BAI and iWUE were significantly positively correlated with temperature (TEM), vapor pressure difference (VPD), and runoff (RO) and significantly negatively correlated with relative humidity (RH). Conversely, in the deep-groundwater sample plot, P. euphratica iWUE was significantly and positively correlated with RH and negatively with VPD. The correlation between the intercellular and atmospheric CO2 concentration ratio (Ci/Ca) and meteorological factors shifted from non-significant to significant with increasing groundwater depth. Ci/Ca variations in P. euphratica were significantly positively correlated with TEM, VPD, and RO and significantly negatively correlated with RH. Thus, with continued climate warming, P. euphratica in deep-groundwater sample plots may face severe drought stress and growth declines in the future. Understanding the dynamic relationship between iWUE and BAI under varying environmental conditions is crucial for predicting forest responses to climate change and informing conservation strategies.

Suggested Citation

  • Abdureyim, Anwar & Wan, Yanbo & Dai, Yue & Flora, Erkin & Shi, Qingdong, 2025. "Effects of intrinsic water-use efficiency and environmental factors on radial growth of Populus euphratica, Taklamakan Desert, China," Agricultural Water Management, Elsevier, vol. 319(C).
    • Handle: RePEc:eee:agiwat:v:319:y:2025:i:c:s0378377425005372
    DOI: 10.1016/j.agwat.2025.109823
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    References listed on IDEAS

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    1. David Bauman & Claire Fortunel & Guillaume Delhaye & Yadvinder Malhi & Lucas A. Cernusak & Lisa Patrick Bentley & Sami W. Rifai & Jesús Aguirre-Gutiérrez & Imma Oliveras Menor & Oliver L. Phillips & B, 2022. "Tropical tree mortality has increased with rising atmospheric water stress," Nature, Nature, vol. 608(7923), pages 528-533, August.
    2. Flora Erkin & Dai Yue & Anwar Abdureyim & Wanyuan Huang & Mawlida Tayir, 2023. "Link between the aboveground and belowground biomass allocation with growing of Tamarix sp. seedlings in the hinterland of Taklimakan Desert, China," PLOS ONE, Public Library of Science, vol. 18(8), pages 1-16, August.
    3. Xiaojin Bing & Keyan Fang & Xiaoying Gong & Wenzhi Wang & Chenxi Xu & Maihe Li & Chaoyue Ruan & Weiting Ma & Yingjun Li & Feifei Zhou, 2022. "The intra-annual intrinsic water use efficiency dynamics based on an improved model," Climatic Change, Springer, vol. 172(1), pages 1-19, May.
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