Homogeneous light in shade-house experiment overestimates carbon gains in Norway maple seedlings

Paquette, Alain; Fontaine, Bastien; Messier, Christian et Brisson, Jacques (2010). « Homogeneous light in shade-house experiment overestimates carbon gains in Norway maple seedlings ». Journal of Horticulture and Forestry, 26(6), pp. 117-121.

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Résumé

We set up a shade-house experiment with Norway maple growing at two light intensities typical of a disturbed and undisturbed forest canopy from either a homogeneous or a dynamic regime that mimics sunflecks. We show that although horticultural-grade shade-cloths can be finely tuned to provide daily averages of any light intensity, they do not appropriately mimic natural forest understories which are characterized by dynamic light environments composed of intense but short direct light events interspaced with prolonged period of low diffuse light. The results suggest that replicating the dynamic light environment of forests could be very important in experiments aimed at identifying the traits responsible for invasiveness in exotic species in forest understories, such as Norway maple in North America.

Type:	Article de revue scientifique
Mots-clés ou Sujets:	Norway maple (Acer platanoides), shade-house, tree seedling growth, photosynthetic response, forest understory, sunfleck, invasive tree species, pot experiment.
Unité d'appartenance:	Centres institutionnels > Centre d'étude de la forêt (CEF) Faculté des sciences > Département des sciences biologiques
Déposé par:	Christian Messier
Date de dépôt:	01 déc. 2011 13:32
Dernière modification:	01 nov. 2014 02:20
Adresse URL :	http://archipel.uqam.ca/id/eprint/4277

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