Kathrin Kühnhammer with one of her wired trees. The group led by Dr Matthias Beyer and Kathrin Kühnhammer is one of the first in the world to measure stable water isotopes in situ - i.e. directly in the field - in the trunk of trees. Picture credits: Kathrin Kühnhammer/TU Braunschweig

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This image is part of: The diversity of plants’ water use strategies makes forests resilient to extreme drought. Please note the copyright of this image.