Abstract
The experimental site was a Mediterranean type forest located in Viols-en-Laval near Montpellier (France). The principal species studied were Quercus ilex and Quercus pubescens. The determination of biogenic emissions was carried out by the enclosure method, which consists in enclosing an intact branch in a Teflon cuvet. The evolution of global terpenic emissions were recorded on June 1995.
For Quercus ilex it appears that most terpenic emissions take place during the diurnal period. The evolution of terpenic emission rates versus light (PAR), internal temperature within the cuvet, CO2 exchange and transpiration (H2O) were carried out. A close relation between terpene emission and light-triggered physiological activities, was always found. It is obvious that there was no simple correlation between the leaf temperature and the terpenic emission. The temperature of the leaves does not seem to play a significant role in the regulation of the monoterpenic emission. This behaviour allows us to conclude that light with its effect on assimilation and stomatal behaviour is the most important factor for monoterpenic emission by Quercus ilex like for Quercus pubescens which is an isoprene emitter.
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Simon, V., Dutaur, L., Brouard-Darmais, S., Riba, M.L., Torres, L. (1998). Biogenic Emissions by Oak Trees Common to Mediterranean Ecosystems. In: Sokhi, R.S. (eds) Urban Air Quality: Monitoring and Modelling. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-5127-6_11
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DOI: https://doi.org/10.1007/978-94-011-5127-6_11
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