Mortality of western larch seedlings in relation to seedbed characteristics at the dry end of its ecological range

The effects of different seedbeds on western larch (Larixoccidentalis Nutt.) germination and seedling mortality were assessed in a grand fir/ninebark (Abies grandis ((Dougl. ex. D.Don) Lindl.))/(Physocarpus malvaceus((Greene) Kuntze)) habitat type in northern Idaho, U.S.A. Two plots were established...

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Bibliographic Details
Published in:Bulletin of the Torrey Botanical Club 1995-04, Vol.122 (2), p.101-108
Main Authors: Oswald, B.P. (Alabama AandM University, Normal, AL.), Neuenschwander, L.F
Format: Article
Language:English
Subjects:
BOSQUES
CRECIMIENTO
CROISSANCE
DEPREDACION
ESCARIFICACION
Forest ecology
Forest soils
FORESTS
FORET
GERMINACION
GERMINATION
GRAINE
Growing seasons
GROWTH
IDAHO
LARIX OCCIDENTALIS
Mineral soils
MORTALIDAD
MORTALITE
MORTALITY
OMBRAGE
PLANTULAS
PLANTULE
PREDATION
PREPARACION DEL ALMACIGO
PREPARATION DU LIT DE SEMENCE
SCARIFICATION
SEEDBED PREPARATION
Seedbeds
SEEDLINGS
SEEDS
SEMILLA
SHADING
Soil ecology
SOIL TYPES
SUPERVIVENCIA
SURVIE
SURVIVAL
TIPOS DE SUELOS
TYPE DE SOL
UMBRIA
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Description
Summary:The effects of different seedbeds on western larch (Larixoccidentalis Nutt.) germination and seedling mortality were assessed in a grand fir/ninebark (Abies grandis ((Dougl. ex. D.Don) Lindl.))/(Physocarpus malvaceus((Greene) Kuntze)) habitat type in northern Idaho, U.S.A. Two plots were established on each of four sites, and 150 western larch seeds (66% viable) were distributed on each of 16 randomly applied seedbed modification combinations (burned or mechanical scarified, mineral soil or duff, shaded or non-shaded, caged or non-caged for protection from predation). Germination percentages and seedling development were significantly greater (4-10 times) on caged units than on uncaged units by midJuly. Shading did not significantly affect germination percentage or initial seedling establishment. No significant differences occurred in germination or initial seedling establishment between burned and unburned treatments. Mortality of seedlings, most likely caused by a month-long dry period with high temperatures, resulted in no significant differences in seedling numbers among treatments by mid-August the first year after seed dispersal. On the dry end of this species' range, there does not appear to be any difference in seedling survival from seedbed modification.
ISSN:0040-9618
2325-8055
DOI:10.2307/2996448