The Phenology of Pythium (Peronosporomycetidae) in Soil

(1) Seasonal changes in availability of Phythium propagules occur in Pythium communities of both cultivated and uncultivated soils. (2) There is a winter peak and summer trough of Phythium propagule availability although there is some evidence for a secondary peak in late winter. (3) The fluctuation...

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Published in:The Journal of ecology 1986-09, Vol.74 (3), p.823-840
Main Authors: Ali-Shtayeh, M. S., Len, Lim-Ho Lhee, Dick, M. W.
Format: Article
Language:English
Subjects:
Agricultural soils
Agrology
Alluvial soils
Orchard soils
Phenology
Phytopathology
Population density
Pythium
Soil ecology
Soil water
Statistical variance
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container_title The Journal of ecology
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creator Ali-Shtayeh, M. S.
Len, Lim-Ho Lhee
Dick, M. W.
description (1) Seasonal changes in availability of Phythium propagules occur in Pythium communities of both cultivated and uncultivated soils. (2) There is a winter peak and summer trough of Phythium propagule availability although there is some evidence for a secondary peak in late winter. (3) The fluctuations have been modelled using a sine curve, and this model can explain a considerable percentage of the variance recorded. (4) The predominant species have been shown to have similar phenology. (5) Sites differ in phase of the fluctuation, with wetter sites tending to show an earlier increase in availability. (6) The amplitude of the fluctuation is related to the mean population density but these variables are independent of the phasing of the changes.
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source JSTOR Archival Journals and Primary Sources Collection
subjects Agricultural soils
Agrology
Alluvial soils
Orchard soils
Phenology
Phytopathology
Population density
Pythium
Soil ecology
Soil water
Statistical variance
title The Phenology of Pythium (Peronosporomycetidae) in Soil
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