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Titolo:
Predicting and managing light in the understory of boreal forests
Autore:
Lieffers, VJ; Messier, C; Stadt, KJ; Gendron, F; Comeau, PG;
Indirizzi:
Univ Alberta, Dept Renewable Resources, Edmonton, AB T6G 2H1, Canada Univ Alberta Edmonton AB Canada T6G 2H1 ces, Edmonton, AB T6G 2H1, Canada Univ Quebec, Dept Sci Biol, Grp Rech Ecol Forestiere GREF Interuniv, Montreal, PQ H3C 3P8, Canada Univ Quebec Montreal PQ Canada H3C 3P8 univ, Montreal, PQ H3C 3P8, Canada British Columbia Minist Forests, Res Branch, Victoria, BC V8W 9C2, Canada British Columbia Minist Forests Victoria BC Canada V8W 9C2 8W 9C2, Canada
Titolo Testata:
CANADIAN JOURNAL OF FOREST RESEARCH-REVUE CANADIENNE DE RECHERCHE FORESTIERE
fascicolo: 6, volume: 29, anno: 1999,
pagine: 796 - 811
SICI:
0045-5067(199906)29:6<796:PAMLIT>2.0.ZU;2-P
Fonte:
ISI
Lingua:
ENG
Soggetto:
PHOTON FLUX-DENSITY; LEAF-AREA INDEX; PHOTOSYNTHETICALLY ACTIVE RADIATION; PSEUDOTSUGA-MENZIESII SEEDLINGS; COASTAL BRITISH-COLUMBIA; CONTORTA VAR LATIFOLIA; TROPICAL RAIN-FOREST; WESTERN RED CEDAR; DIRECT-BEAM LIGHT; SOLAR-RADIATION;
Tipo documento:
Review
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
155
Recensione:
Indirizzi per estratti:
Indirizzo: Lieffers, VJ Univ Alberta, Dept Renewable Resources, 442 ESB, Edmonton, ABT6G 2H1, Canada Univ Alberta 442 ESB Edmonton AB Canada T6G 2H1 G 2H1, Canada
Citazione:
V.J. Lieffers et al., "Predicting and managing light in the understory of boreal forests", CAN J FORES, 29(6), 1999, pp. 796-811

Abstract

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.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 05/12/20 alle ore 20:16:16