VellendMyersGardescuEtAl2003

Référence

Vellend, M., Myers, J.A., Gardescu, S. and Marks, P.L. (2003) Dispersal of Trillium seeds by deer: Implications for long-distance migration of forest herbs. Ecology, 84(4):1067-1072. (Scopus )

Résumé

Theoretical models of plant range expansion require the assumption of occasional long-distance seed-dispersal events to explain post-glacial migration rates. For the many forest herbs whose seeds are dispersed primarily by ants, there are few documented mechanisms of occasional long-distance dispersal, so models of forest-herb migration have been largely phenomenological. Here we show that viable seeds of Trillium grandiflorum, an ant-dispersed forest herb in eastern North America, are dispersed via ingestion and defecation by white-tailed deer. We also use data from the literature on movement patterns and gut retention times to model a deer-generated seed shadow, showing that most seeds dispersed by deer should travel at least several hundred meters from parent plants, and occasionally >3 km. Our results provide a mechanism of long-distance dispersal that has likely contributed to rates of post-glacial migration and post-agricultural forest colonization.

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@ARTICLE { VellendMyersGardescuEtAl2003,
    AUTHOR = { Vellend, M. and Myers, J.A. and Gardescu, S. and Marks, P.L. },
    TITLE = { Dispersal of Trillium seeds by deer: Implications for long-distance migration of forest herbs },
    JOURNAL = { Ecology },
    YEAR = { 2003 },
    VOLUME = { 84 },
    PAGES = { 1067-1072 },
    NUMBER = { 4 },
    ABSTRACT = { Theoretical models of plant range expansion require the assumption of occasional long-distance seed-dispersal events to explain post-glacial migration rates. For the many forest herbs whose seeds are dispersed primarily by ants, there are few documented mechanisms of occasional long-distance dispersal, so models of forest-herb migration have been largely phenomenological. Here we show that viable seeds of Trillium grandiflorum, an ant-dispersed forest herb in eastern North America, are dispersed via ingestion and defecation by white-tailed deer. We also use data from the literature on movement patterns and gut retention times to model a deer-generated seed shadow, showing that most seeds dispersed by deer should travel at least several hundred meters from parent plants, and occasionally >3 km. Our results provide a mechanism of long-distance dispersal that has likely contributed to rates of post-glacial migration and post-agricultural forest colonization. },
    COMMENT = { Cited By (since 1996): 82 Export Date: 11 March 2011 Source: Scopus CODEN: ECOLA },
    ISSN = { 00129658 (ISSN) },
    KEYWORDS = { Ant dispersal, Climate change and plant migration, Deer, white tailed, Dispersal biology, Forest herbs, long-distance migration of, Herbivore, Migration, Seed dispersal, long distance, Seed shadow, deer generated, Trillium, deer, herb, herbivore, range expansion, seed dispersal, zoochory, North America, Animalia, Cervidae, Formicidae, Odocoileus virginianus, Trillium, Trillium grandiflorum },
    OWNER = { Luc },
    TIMESTAMP = { 2011.03.11 },
    URL = { http://www.scopus.com/inward/record.url?eid=2-s2.0-0042315069&partnerID=40&md5=4129244c3cfe72d8f811f478bdb3bd77 },
}

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