LechowiczBell1991

Référence

Lechowicz, M.J., Bell, G. (1991) The ecology and genetics of fitness in forest plants. II. Microspatial heterogeneity of the edaphic environment. Journal of Ecology, 79(3):687-696.

Résumé

Variation in the physical environment was investigated at scales of 0.1-50 m in the understorey of a Quebec forest, near Montreal, dominated by Acer saccharum and Fagus grandifolia, to determine if the spatial heterogeneity necessary to account for the evolution and maintenance of genetically diverse populations of forest plants exists in this old-growth forest. To characterize spatial heterogeneity in the understorey during the late summer, soil pH and the availability of K+ and NO3- ions in the soil solution were measured. All three edaphic measures are predictably similar up to c2m, but at greater distances the predictability is negligible and the environmental regime is best estimated by the mean for the site as a whole. Results demonstrate environmental variance at scales relevant to seed dispersal and genetic neighbourhood size in understorey herbs such as Impatiens pallida. This spatial pattern of environmental variation may contribute to the maintenance of genetic variation through selection of locally adapted subpopulations. (See also 92L/07956 and 07963). -from Authors

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@ARTICLE { LechowiczBell1991,
    AUTHOR = { Lechowicz, M.J. and Bell, G. },
    TITLE = { The ecology and genetics of fitness in forest plants. II. Microspatial heterogeneity of the edaphic environment },
    JOURNAL = { Journal of Ecology },
    YEAR = { 1991 },
    VOLUME = { 79 },
    PAGES = { 687-696 },
    NUMBER = { 3 },
    NOTE = { 00220477 (ISSN) Cited By (since 1996): 98 Export Date: 26 April 2007 Source: Scopus Language of Original Document: English },
    ABSTRACT = { Variation in the physical environment was investigated at scales of 0.1-50 m in the understorey of a Quebec forest, near Montreal, dominated by Acer saccharum and Fagus grandifolia, to determine if the spatial heterogeneity necessary to account for the evolution and maintenance of genetically diverse populations of forest plants exists in this old-growth forest. To characterize spatial heterogeneity in the understorey during the late summer, soil pH and the availability of K+ and NO3- ions in the soil solution were measured. All three edaphic measures are predictably similar up to c2m, but at greater distances the predictability is negligible and the environmental regime is best estimated by the mean for the site as a whole. Results demonstrate environmental variance at scales relevant to seed dispersal and genetic neighbourhood size in understorey herbs such as Impatiens pallida. This spatial pattern of environmental variation may contribute to the maintenance of genetic variation through selection of locally adapted subpopulations. (See also 92L/07956 and 07963). -from Authors },
    KEYWORDS = { fitness neighbourhood effect seed dispersal understorey Canada, Quebec, Montreal Acer saccharum Fagus grandifolia Impatiens pallida },
    OWNER = { brugerolles },
    TIMESTAMP = { 2007.12.05 },
}

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