Biogeosciences
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Articles | Volume 22, issue 18
Articles | Volume 22, issue 18
https://doi.org/10.5194/bg-22-4993-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Special issue:
https://doi.org/10.5194/bg-22-4993-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 22, issue 18
Research article
 | 
26 Sep 2025
Research article |  | 26 Sep 2025

Tree growth and water-use efficiency at the Himalayan fir treeline and lower altitudes: roles of climate warming and CO2 fertilization

Xing Pu and Lixin Lyu

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Short summary
This study explores how rising CO₂ and increasing temperatures affect the growth of Himalayan fir trees on the Tibetan Plateau, particularly in relation to water availability. We found that, while tree growth in wet, high-elevation areas improved with increased CO₂, growth in dry, low-elevation areas declined due to water stress. These findings suggest that, while CO₂ may boost growth in some areas, the negative effects of drought may outweigh these benefits.
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Treeline ecotones under global change: linking spatial patterns...
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