Summary
The enrichment of18O in the water of transpiring leaves under natural conditions is described. In the first series two, later three species at the same location and at the same time are compared (birchBetula pubescens L., oakQuercus robur Ehrh., larchLarix decidua Mill., and sprucePicea abies Karst). All four show parallel enrichment properties. In addition two beeches (Fagus silvatica L.) were observed, one at Jülich, the other at the Solling hills. They show a similar18O/16O ratio fluctuation in their leaves during the time of observation. Three plant communities (beech forest B1, spruce forest F1, and meadow W, sites of the “Solling-Project”, German Research Foundation, part of International Biological Program, at the Solling hills) show a daily course of the18O enrichment comparable to each other.
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Förstel, H. The enrichment of18O in leaf water under natural conditions. Radiat Environ Biophys 15, 323–344 (1978). https://doi.org/10.1007/BF01323459
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DOI: https://doi.org/10.1007/BF01323459