VanShipleyTheriault1987

Référence

Van Hulst, R., Shipley, B., Theriault, A. (1987) Why is Rhinanthus minor ( Scrophulariaceae) such a good invader? Canadian Journal of Botany, 65(11):2373-2379.

Résumé

Rhinanthus minor is an annual grassland hemiparasite often found where other annuals are rare or absent. In addition to its invasive abilities, R. minor has other characteristics seldom found in annuals: virtual lack of a seed bank; few seeds per plant; seeds too big to be readily dispersed under natural conditions; and a Deevey type I or II survivorship curve. Fecundity is positively correlated with surrounding biomass and negatively with R. minor density. Survivorship is negatively correlated with surrounding vegetation biomass and with R. minor density. Presumably, R. minor is an effective invader in relatively unproductive grassland because its finite rate of increase is a nonlinear function of the biomass of the surrounding vegetation, being maximized when the surrounding vegetation is dense enough to allow effective root parasitism (increasing R. minor fecundity) but not so dense that young R. minor plants are outcompeted for light (decreasing R. minor survivorship).-from Authors

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@ARTICLE { VanShipleyTheriault1987,
    AUTHOR = { Van Hulst, R. and Shipley, B. and Theriault, A. },
    TITLE = { Why is Rhinanthus minor ( Scrophulariaceae) such a good invader? },
    JOURNAL = { Canadian Journal of Botany },
    YEAR = { 1987 },
    VOLUME = { 65 },
    PAGES = { 2373-2379 },
    NUMBER = { 11 },
    NOTE = { 00084026 (ISSN) Cited By (since 1996): 26 Export Date: 26 April 2007 Source: Scopus Language of Original Document: English },
    ABSTRACT = { Rhinanthus minor is an annual grassland hemiparasite often found where other annuals are rare or absent. In addition to its invasive abilities, R. minor has other characteristics seldom found in annuals: virtual lack of a seed bank; few seeds per plant; seeds too big to be readily dispersed under natural conditions; and a Deevey type I or II survivorship curve. Fecundity is positively correlated with surrounding biomass and negatively with R. minor density. Survivorship is negatively correlated with surrounding vegetation biomass and with R. minor density. Presumably, R. minor is an effective invader in relatively unproductive grassland because its finite rate of increase is a nonlinear function of the biomass of the surrounding vegetation, being maximized when the surrounding vegetation is dense enough to allow effective root parasitism (increasing R. minor fecundity) but not so dense that young R. minor plants are outcompeted for light (decreasing R. minor survivorship).-from Authors },
    OWNER = { brugerolles },
    TIMESTAMP = { 2007.12.05 },
}

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