RicardMessierDelagrangeEtAl2003

Référence

Ricard, J.P., Messier, C., Delagrange, S., Beaudet, M. (2003) Do understory sapling respond to both light and below-ground competition?: A field experiment in a north-eastern American hardwood forest and a literature review. Annals of Forest Science, 60(8):749-756.

Résumé

A study was initiated in 1993 to evaluate the potential effects of both above- and below-ground competition exclusion on yellow birch (Betula alleghaniensis Britton), sugar maple (Acer saccharum Marsh.) and American beech (Fagus grandifolia Ehrh.) sapling growth along an understory light gradient ranging from 3% to 50% of full sunlight. We compared four different growth variables between a control and a treatment (trenching and manual removal of nearby vegetation). Height growth, diameter growth, height over stem diameter ratio, and crown area varied with light availability in all three species, whereas trenching treatment had no significant effect. Our results show that light is the main factor affecting understory sapling growth following a selection cut in this northern hardwood forest, at least up to 50% full sunlight. The unresponsiveness of these three species to below-ground competition is discussed in relation to a literature review in which both soil richness and species functional ecology are considered.

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@ARTICLE { RicardMessierDelagrangeEtAl2003,
    AUTHOR = { Ricard, J.P. and Messier, C. and Delagrange, S. and Beaudet, M. },
    TITLE = { Do understory sapling respond to both light and below-ground competition?: A field experiment in a north-eastern American hardwood forest and a literature review },
    JOURNAL = { Annals of Forest Science },
    YEAR = { 2003 },
    VOLUME = { 60 },
    PAGES = { 749-756 },
    NUMBER = { 8 },
    NOTE = { Cited By (since 1996): 9 Export Date: 6 March 2007 Source: Scopus },
    ABSTRACT = { A study was initiated in 1993 to evaluate the potential effects of both above- and below-ground competition exclusion on yellow birch (Betula alleghaniensis Britton), sugar maple (Acer saccharum Marsh.) and American beech (Fagus grandifolia Ehrh.) sapling growth along an understory light gradient ranging from 3% to 50% of full sunlight. We compared four different growth variables between a control and a treatment (trenching and manual removal of nearby vegetation). Height growth, diameter growth, height over stem diameter ratio, and crown area varied with light availability in all three species, whereas trenching treatment had no significant effect. Our results show that light is the main factor affecting understory sapling growth following a selection cut in this northern hardwood forest, at least up to 50% full sunlight. The unresponsiveness of these three species to below-ground competition is discussed in relation to a literature review in which both soil richness and species functional ecology are considered. },
    KEYWORDS = { Above- and below-ground competition Growth Light Northern hardwood species Trenching },
    OWNER = { brugerolles },
    TIMESTAMP = { 2007.12.05 },
}

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