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Forest Ecosystems 2022, 9(1): 100003 https://doi.org/10.1016/j.fecs.2022.100003
Research Article | Open Access | Issue | Published: 25 February 2022

Variation in water supply leads to different responses of tree growth to warming

Show Author's Information Pengfei Zhenga,  Dandan Wangb,  Guodong Jiaa( ),  Xinxiao Yua( ),  Ziqiang Liuc,  Yusong Wanga,  Yonge Zhanga
Key Laboratory of State Forestry Administration on Soil and Water Conservation, Beijing Forestry University, Beijing, 100083, China
State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing, 100038, China
Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing, 210037, China
Keywords:
Climate change, Drought stress, Temperate forests, Stable isotope, Tree rings, Snowmelt
Cite this article:
Zheng P, Wang D, Jia G, et al. Variation in water supply leads to different responses of tree growth to warming. Forest Ecosystems, 2022, 9(1): 100003. https://doi.org/10.1016/j.fecs.2022.100003
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Abstract Full text About this article
Background

Global climate change, characterized by changes in precipitation, prolonged growing seasons, and warming-induced water deficits, is putting increased pressure on forest ecosystems globally. Understanding the impact of climate change on drought-prone forests is a key objective in assessing forest responses to climate change.

Methods

In this study, we assessed tree growth trends and changes in physiological activity under climate change based on measurements of tree ring and stable isotopes. Additionally, structural equation models were used to identify the climate drivers influencing tree growth for the period 1957–2016.

Results

We found that the mean basal area increment decreased first and then increased, while the water use efficiency showed a steady increase. The effects of climate warming on tree growth switched from negative to positive in the period 1957–2016. Adequate water supply, especially snowmelt water available in the early critical period, combined with an earlier arrival of the growing season, allowed to be the key to the reversal of the effects of warming on temperature forests. The analysis of structural equation models (SEM) also demonstrated that the growth response of Pinus tabuliformis to the observed temperature increase was closely related to the increase in water availability.

Conclusions

Our study indicates that warming is not the direct cause of forest decline, but does indeed exacerbate droughts, which generally cause forest declines. Water availability at the beginning of the growing season might be critical in the adaptation to rising temperatures in Asia. Temperate forests may be better able to withstand rising temperatures if they have sufficient water, with boosted growth even possible during periods of rising temperatures, thus forming stronger carbon sinks.


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About this article

Variation in water supply leads to different responses of tree growth to warming

Show Author's information Pengfei Zhenga, Dandan Wangb, Guodong Jiaa( ), Xinxiao Yua( ), Ziqiang Liuc, Yusong Wanga, Yonge Zhanga
Key Laboratory of State Forestry Administration on Soil and Water Conservation, Beijing Forestry University, Beijing, 100083, China
State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing, 100038, China
Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing, 210037, China

Abstract

Background

Global climate change, characterized by changes in precipitation, prolonged growing seasons, and warming-induced water deficits, is putting increased pressure on forest ecosystems globally. Understanding the impact of climate change on drought-prone forests is a key objective in assessing forest responses to climate change.

Methods

In this study, we assessed tree growth trends and changes in physiological activity under climate change based on measurements of tree ring and stable isotopes. Additionally, structural equation models were used to identify the climate drivers influencing tree growth for the period 1957–2016.

Results

We found that the mean basal area increment decreased first and then increased, while the water use efficiency showed a steady increase. The effects of climate warming on tree growth switched from negative to positive in the period 1957–2016. Adequate water supply, especially snowmelt water available in the early critical period, combined with an earlier arrival of the growing season, allowed to be the key to the reversal of the effects of warming on temperature forests. The analysis of structural equation models (SEM) also demonstrated that the growth response of Pinus tabuliformis to the observed temperature increase was closely related to the increase in water availability.

Conclusions

Our study indicates that warming is not the direct cause of forest decline, but does indeed exacerbate droughts, which generally cause forest declines. Water availability at the beginning of the growing season might be critical in the adaptation to rising temperatures in Asia. Temperate forests may be better able to withstand rising temperatures if they have sufficient water, with boosted growth even possible during periods of rising temperatures, thus forming stronger carbon sinks.

Keywords: Climate change, Drought stress, Temperate forests, Stable isotope, Tree rings, Snowmelt

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Published: 25 February 2022
Issue date: February 2022

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© 2022 Beijing Forestry University.

Acknowledgements

Acknowledgements

We thank Erdie Zi and Weiwei Lu for their help with fieldwork.

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This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by/4.0/).

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