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Titolo:
Leaf- and plant-level carbon gain in yellow birch, sugar maple, and beech seedlings from contrasting forest light environments
Autore:
Beaudet, M; Messier, C; Hilbert, DW; Lo, E; Wang, ZM; Lechowicz, MJ;
Indirizzi:
Univ Quebec, Dept Sci Biol, Grp Rech Ecol Forestiere Interuniv, Montreal, PQ H3C 3P8, Canada Univ Quebec Montreal PQ Canada H3C 3P8 univ, Montreal, PQ H3C 3P8, Canada McGill Univ, Dept Biol, GREFi, Montreal, PQ H3A 1B1, Canada McGill Univ Montreal PQ Canada H3A 1B1 REFi, Montreal, PQ H3A 1B1, Canada
Titolo Testata:
CANADIAN JOURNAL OF FOREST RESEARCH-REVUE CANADIENNE DE RECHERCHE FORESTIERE
fascicolo: 3, volume: 30, anno: 2000,
pagine: 390 - 404
SICI:
0045-5067(200003)30:3<390:LAPCGI>2.0.ZU;2-U
Fonte:
ISI
Lingua:
ENG
Soggetto:
NORTHERN HARDWOOD FOREST; ACER-SACCHARUM SEEDLINGS; CENTRAL NEW-ENGLAND; SHADE TOLERANCE; GAS-EXCHANGE; PHOTOSYNTHETIC CHARACTERISTICS; SUCCESSIONAL STATUS; CANOPY RECRUITMENT; FAGUS-GRANDIFOLIA; TREE SEEDLINGS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
90
Recensione:
Indirizzi per estratti:
Indirizzo: Messier, C Univ Quebec, Dept Sci Biol, Grp Rech Ecol Forestiere Interuniv,POB 8888,Ctr Ville Branch, Montreal, PQ H3C 3P8, Canada Univ Quebec POB 8888,Ctr Ville Branch Montreal PQ Canada H3C 3P8
Citazione:
M. Beaudet et al., "Leaf- and plant-level carbon gain in yellow birch, sugar maple, and beech seedlings from contrasting forest light environments", CAN J FORES, 30(3), 2000, pp. 390-404

Abstract

Leaf-level photosynthetic-light response and plant-level daily carbon gainwere estimated for seedlings of moderately shade-tolerant yellow birch (Betula alleghaniensis Britton) and shade-tolerant sugar maple (Acer saccharumMarsh.) and beech (Fagus grandifolia Ehrh.) growing in gaps and under a closed canopy in a sugar maple stand at Duchesnay, Que. All three species hada higher photosynthetic capacity (A(max)) in the gaps than in shade, but yellow birch and beech responded more markedly than sugar maple to the increase in light availability. The high degree of plasticity observed in beech suggests that the prediction that photosynthetic plasticity should decreasewith increasing shade tolerance may not hold when comparisons are made among a few late-successional species. Unit-area daily carbon gain (C-A) was significantly higher in the gaps than in shade for all three species, but nosignificant difference was observed between light environments for plant-level carbon gain (C-W). In shade, we found no difference of C-A and C-W among species. In gaps, beech had a significantly higher C-A than sugar maple but similar to that of birch, and birch had a significantly higher C-W thanmaple but similar to that of beech. Sugar maple consistently had lower carbon gains than yellow birch and beech but is nevertheless the dominant species at our study site. These results indicate that although plant-level carbon gain is presumably more closely related to growth and survival of a species than leaf-level photosynthesis, it is still many steps removed from the ecological success of a species.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 25/11/20 alle ore 07:35:37