Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Effects of light availability and sapling size on the growth and crown morphology of understory Douglas-fir and lodgepole pine
Autore:
Williams, H; Messier, C; Kneeshaw, DD;
Indirizzi:
UnivaQuebec, Grp Rech Ecol Forstiere Interuniv, Montreal, PQ H3C 3P8, Canad Univ Quebec Montreal PQ Canada H3C 3P8 runiv, Montreal, PQ H3C 3P8, Canad Univ Quebec, Dept Sci Biol, Montreal, PQ H3C 3P8, Canada Univ Quebec Montreal PQ Canada H3C 3P8 Biol, Montreal, PQ H3C 3P8, Canada Oikos Ecol Serv Ltd, Smithers, BC V0J 2N0, Canada Oikos Ecol Serv Ltd Smithers BC Canada V0J 2N0 ithers, BC V0J 2N0, Canada
Titolo Testata:
CANADIAN JOURNAL OF FOREST RESEARCH-REVUE CANADIENNE DE RECHERCHE FORESTIERE
fascicolo: 2, volume: 29, anno: 1999,
pagine: 222 - 231
SICI:
0045-5067(199902)29:2<222:EOLAAS>2.0.ZU;2-B
Fonte:
ISI
Lingua:
ENG
Soggetto:
SHADE TOLERANCE; ALLOCATION PATTERNS; EFFICIENT METHOD; ARCHITECTURE; SEEDLINGS; GRADIENT; TREES; HEIGHT;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
33
Recensione:
Indirizzi per estratti:
Indirizzo: Messier, C UnivMontreal,Grp Rech Ecol Forstiere Interuniv, POB 8888,Ctr Ville Branch, Univ Quebec POB 8888,Ctr Ville Branch Montreal PQ Canada H3C 3P8
Citazione:
H. Williams et al., "Effects of light availability and sapling size on the growth and crown morphology of understory Douglas-fir and lodgepole pine", CAN J FORES, 29(2), 1999, pp. 222-231

Abstract

Information on the dynamics of sapling growth of Douglas-fir (Pseudotsuga menziesii var, glauca (Beissn. ) France) and lodgepole pine (Pinus contorta Dougl. ex Loud. var. latifolia Engelm), two dominant species in the interior of British Columbia, Canada, is incomplete and thus the objective of thisstudy was to understand how light availability and sapling size interact to influence their growth and crown morphology. in an undisturbed forest, 360 saplings were randomly selected in three light classes 0-15, 15-30, and >30% PPFD (photosynthetic photon flux density). A number of morphological and growth parameters were measured, including height and lateral branch growth. Douglas-fir had a more plastic crown morphology than lodgepole pine with its leader to lateral branch growth ratio, live crown depth, and number of branches increasing with increasing light class. Sapling size had little effect on morphological characteristics, but larger saplings of both species had greater absolute height growth and lateral branch growth than did smaller saplings. Both Douglas-fir and lodgepole pine were able to survive up to 50 years and attain a height of 3 m at less than 5% PPFD. These results further suggest that shade tolerance is greater on drier sites, although the mechanisms for such increases in tolerance are unknown. The ecological implications of these findings are discussed in a forestry context.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 01/12/20 alle ore 10:29:35