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

被引：71

作者：

Ricard, JP ^{[1
]}

Messier, C ^{[1
]}

Delagrange, S ^{[1
]}

Beaudet, M ^{[1
]}

机构：

[1] Univ Quebec, Dept Sci Biol, Grp Rech Ecol Forestiere Interuniv, CP 8888,Succursale Ctr Ville, Montreal, PQ H3C 3P8, Canada

来源：

ANNALS OF FOREST SCIENCE | 2003年 / 60卷 / 08期

关键词：

above- and below-ground competition; growth; light; northern hardwood species; trenching;

D O I：

10.1051/forest:2003069

中图分类号：

S7 [林业];

学科分类号：

0829 ; 0907 ;

摘要：

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.

引用

页码：749 / 756

页数：8

共 60 条

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