A plot-based method for rapid estimation of forest canopy chemistry

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In this study we present a rapid method to scale the leaf-level chemistry of forest stands to the whole-canopy level. The method combines simple leaf-level measurements of mass and chemistry with a camera-based technique to estimate the fractional distribution of species' foliage area in a forest canopy. Results using this methodology for the estimation of whole-canopy N concentration (g/100 g) are presented and are shown to be comparable with those derived directly from litter fall collection. The ability to efficiently scale leaf-level traits to whole forest canopies enhances our ability to examine key relationships associated with these traits at various levels from the leaf to the forest stand and, with remote sensing technologies, to larger landscapes.

Cette étude présente une méthode rapide pour transposer les caractéristiques chimiques de la feuille au niveau de l'ensemble du couvert dans les peuplements forestiers. La méthode combine la mesure de la masse et des caractéristiques chimiques au niveau d'une simple feuille avec une technique utilisant une caméra pour estimer la proportion du couvert forestier occupée par la surface foliaire de chaque espèce. Dans le cas de la concentration (g/100 g) globale de N dans le couvert forestier, les résultats obtenus par cette méthode sont comparables à ceux qui découlent directement du captage de litière. La possibilité de transposer efficacement les caractéristiques d'une feuille à l'ensemble du couvert forestier augmente notre capacité d'étudier les relations fondamentales associées à ces caractéristiques à diverses échelles, de la feuille jusqu'au peuplement et, à l'aide des techniques de télédétection, à des paysages plus vastes.[Traduit par la Rédaction]

Document Type: Research Article

Publication date: March 1, 2001

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  • Published since 1971, this monthly journal features articles, reviews, notes and commentaries on all aspects of forest science, including biometrics and mensuration, conservation, disturbance, ecology, economics, entomology, fire, genetics, management, operations, pathology, physiology, policy, remote sensing, social science, soil, silviculture, wildlife and wood science, contributed by internationally respected scientists. It also publishes special issues dedicated to a topic of current interest.
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