ClaydenBouchard1983

Référence

Clayden, S., Bouchard, A. (1983) Structure and dynamics of conifer- lichen stands on rock outcrops south of Lake Abitibi, Quebec. Canadian Journal of Botany, 61(3):850-871.

Résumé

The plant communities of shallow soil and bare rock on outcrops of ryolite and basalt are described. Most of the intersite variation in composition and structure is due to succession. The two rock types have distinctive assemblages of epilithic lichens and bryophytes but their thin soil communities do not differ significantly. Soil coverage and depth are controlled in part by bedrock slope and microtopography and increase uniformly in relation to the postfire age of the outcrop tree stands. The ground layer macrolichens and bryophytes undergo a succession of dominant species and growth forms, but the open-crown coniferous stands show little evidence of self-regeneration through tree seedling establishment or vegetative propagation. Stands of different age dominated by Pinus banksiana and Picea mariana do not form a clear successional sequence. Fire recurrence prevents complete closure of the outcrop tree canopy.-from Authors

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@ARTICLE { ClaydenBouchard1983,
    AUTHOR = { Clayden, S. and Bouchard, A. },
    TITLE = { Structure and dynamics of conifer- lichen stands on rock outcrops south of Lake Abitibi, Quebec },
    JOURNAL = { Canadian Journal of Botany },
    YEAR = { 1983 },
    VOLUME = { 61 },
    PAGES = { 850-871 },
    NUMBER = { 3 },
    NOTE = { 00084026 (ISSN) Cited By (since 1996): 7 Export Date: 26 April 2007 Source: Scopus Language of Original Document: English },
    ABSTRACT = { The plant communities of shallow soil and bare rock on outcrops of ryolite and basalt are described. Most of the intersite variation in composition and structure is due to succession. The two rock types have distinctive assemblages of epilithic lichens and bryophytes but their thin soil communities do not differ significantly. Soil coverage and depth are controlled in part by bedrock slope and microtopography and increase uniformly in relation to the postfire age of the outcrop tree stands. The ground layer macrolichens and bryophytes undergo a succession of dominant species and growth forms, but the open-crown coniferous stands show little evidence of self-regeneration through tree seedling establishment or vegetative propagation. Stands of different age dominated by Pinus banksiana and Picea mariana do not form a clear successional sequence. Fire recurrence prevents complete closure of the outcrop tree canopy.-from Authors },
    KEYWORDS = { bryophytes epilithic lichens Picea mariana Pinus banksiana },
    OWNER = { brugerolles },
    TIMESTAMP = { 2007.12.04 },
}

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