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Related Experiment Video

Updated: May 15, 2025

A Telemetric, Gravimetric Platform for Real-Time Physiological Phenotyping of Plant–Environment Interactions
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Tree Growth, Contraction and Recovery: Disentangling Soil and Atmospheric Drought Effects.

Erez Feuer1, Yakir Preisler2,3,4, Eyal Rotenberg4

  • 1Institute of Environmental Sciences, The Hebrew University of Jerusalem, Rehovot, Israel.

Plant, Cell & Environment
|May 14, 2025
PubMed
Summary

Soil water availability is key to tree resilience during drought. Even with heatwaves, trees with sufficient soil moisture can recover growth, while those without may contract.

Keywords:
compound droughtdendrometerdry forestgrowth raterecoveryresistance

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Area of Science:

  • Ecology
  • Forest Science
  • Climate Change Biology

Background:

  • Droughts, driven by soil and atmospheric conditions, significantly impact forest ecosystems.
  • Understanding tree responses to compound drought events is crucial for predicting forest resilience under climate change.

Purpose of the Study:

  • To investigate the combined effects of soil and atmospheric droughts on tree growth and recovery in a semi-arid pine forest.
  • To differentiate the impacts of atmospheric drought from compound drought stress using an irrigation experiment.

Main Methods:

  • Utilized high-resolution stem diameter variation data to analyze tree growth dynamics.
  • Implemented an irrigation experiment to create distinct soil water availability scenarios (irrigated vs. control plots).
  • Employed stem diameter variation analysis to identify growth modes linked to soil water status.

Main Results:

  • Heatwaves consistently reduced stem expansion rates in all trees.
  • During dry seasons, irrigated trees maintained positive growth despite heatwaves, while control trees experienced net stem contraction.
  • Control trees exhibited minimal growth in the dry season but recovered rapidly with the onset of the wet season.

Conclusions:

  • Soil water availability acts as a critical buffer against the negative impacts of atmospheric drought and heatwaves on tree growth.
  • Trees balance growth, contraction, and recovery based on seasonal water availability, highlighting the pivotal role of soil moisture.
  • This research provides vital insights for anticipating forest dynamics and resilience in the face of intensifying climate change-induced drought events.