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Titolo:
Effects of light availability and sapling size on the growth, biomass allocation, and crown morphology of understory sugar maple, yellow birch, and beech
Autore:
Messier, C; Nikinmaa, E;
Indirizzi:
Univ Quebec, GREFi, Montreal, PQ H3C 3P8, Canada Univ Quebec Montreal PQ Canada H3C 3P8 REFi, Montreal, PQ H3C 3P8, Canada Univ Helsinki, Dept Forest Ecol, FIN-00014 Helsinki, Finland Univ Helsinki Helsinki Finland FIN-00014 ol, FIN-00014 Helsinki, Finland
Titolo Testata:
ECOSCIENCE
fascicolo: 3, volume: 7, anno: 2000,
pagine: 345 - 356
SICI:
1195-6860(2000)7:3<345:EOLAAS>2.0.ZU;2-O
Fonte:
ISI
Lingua:
ENG
Soggetto:
SHADE TOLERANCE; TROPICAL TREES; EFFICIENT METHOD; HARDWOOD FOREST; ACER-SACCHARUM; FLUX-DENSITY; ARCHITECTURE; ENVIRONMENT; CANOPY; SIMULATION;
Keywords:
functional ecology; sugar maple; yellow birch; beech; understory trees; succession; crown morphology; biomass allocation; light availability; shade tolerance;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
47
Recensione:
Indirizzi per estratti:
Indirizzo: Messier, C Univ Quebec, GREFi, CP 8888,Succursale Ctr Ville, Montreal, PQ H3C 3P8, Canada Univ Quebec CP 8888,Succursale Ctr Ville Montreal PQ CanadaH3C 3P8
Citazione:
C. Messier e E. Nikinmaa, "Effects of light availability and sapling size on the growth, biomass allocation, and crown morphology of understory sugar maple, yellow birch, and beech", ECOSCIENCE, 7(3), 2000, pp. 345-356

Abstract

The patterns of above-ground growth, biomass allocation, crown morphology,and light attenuation were compared between small (50 to 250 cm tall) and tall (250 to 600 cm tall) yellow birch, sugar maple, and beech individuals in low (< 10% of above-canopy PPFD (Photosynthetic Photon Flux Density)) and high (10 to 40% PPFD) Light environments in a mature sugar maple-birch-beech stand near Quebec city, Canada. Significant differences in above-groundgrowth, crown morphology, and allocation patterns were found among (i) thethree co-dominating tree species, (ii) short and tall individuals, and (iii) low and high light environments. The direction of the differences in most baits investigated between low and high light environments were strikingly similar among the three species, but the magnitude of the differences often varied. Overall, yellow birch differed more in several traits in terms of its responses to light and size compared to beech and sugar maple. In general, differences found between light environments were smaller for the taller saplings, indicating that plasticity tends to decrease with increasing size in all three species. None of these crown structural differences foundamong species translated into differences in light attenuation within the sapling crowns. The maximum height observed in individual trees of all three species tended to decrease sharply below approximately 4% PPFD. We suggest that maximum tree height is restricted in such low light environments since the photosynthetic to non-photosynthetic tissue ratio, as measured by the leaf area ratio (LAR), declines rapidly with seedling size up to 150 cm. We suggest that these three species co-dominate in this forest due to a combination of small but effective differences in physiological, morphological, and allocational traits and responses to increases in the understory light environment.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 05/12/20 alle ore 18:59:43