Predicting and managing light in the understory of boreal forests

Lieffers, V.J.; Messier, C.; Stadt, K.J.; Gendron, F. et Comeau, P.G. (1999). « Predicting and managing light in the understory of boreal forests ». Canadian Journal of Forest Research, 29, pp. 796-811.

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Résumé

This paper reviews current information relating to the dynamics of light in northern and boreal forests and discusses factors affecting overstory light transmission, seasonality of light, sunflecks, canopy gaps, and understory development, particularly with regard to tree regeneration. Techniques for measurement of light in forests such as radiometers, photosensitive paper or chemicals, hemispherical canopy photographs, the plant canopy analyzer, or visual estimators of canopy density are each discussed in terms of their accuracy, costs, ease of use, and conditions required during measurement. Predictive models of light transmission based on canopy architecture are also described in terms of their assumptions, accuracy, and input data costs. Lastly the paper discusses the relationship among overstory and understory densities, ground-level light, and 'windows of opportunity' for regeneration of trees in the understory following management interventions.

Type: Article de revue scientifique
Mots-clés ou Sujets: light, understory of boreal forests, densities, ground-level light
Unité d'appartenance: Faculté des sciences > Département des sciences biologiques
Déposé par: Christian Messier
Date de dépôt: 08 janv. 2009
Dernière modification: 01 nov. 2014 02:08
Adresse URL : http://www.archipel.uqam.ca/id/eprint/1611

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