Abstract
The diameter of tree stems growing under open and controlled conditions undergoes rhythmic fluctuations independent of daily periodic factors such as light, temperature and humidity. We find a strong correlation between these fluctuations and the timing and strength of tides. This correlation suggests that the Moon is influencing the flow of water between different parts of the trees.
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Zürcher, E., Cantiani, MG., Sorbetti-Guerri, F. et al. Tree stem diameters fluctuate with tide. Nature 392, 665–666 (1998). https://doi.org/10.1038/33570
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DOI: https://doi.org/10.1038/33570
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