Clonal diversity in an expanding community of arctic Salix spp. and a model for recruitment modes of arctic plants

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TitleClonal diversity in an expanding community of arctic Salix spp. and a model for recruitment modes of arctic plants
Publication TypeJournal Article
Year of Publication2010
AuthorsDouhovnikoff, V, Goldsmith, GR, Tape, KD, Huang, C, Sur, N, M Bret-Harte, S
JournalArctic, Antarctic and Alpine Research
Volume42
Issue4
Pagination406-411
Date PublishedNovember 2010
ISBN Number1523-0430
Accession NumberARC668
Abstract

Rapid climate change in arctic environments is leading to a widespread expansion in woody deciduous shrub populations. However, little is known about the reproductive, dispersal, and establishment mechanisms associated with shrub expansion. It is assumed that harsh environmental conditions impose limitations on plant sexual reproduction in the Arctic, such that population survival and expansion is predominately a function of clonal recruitment. We present contrary evidence from microsatellite genetic data suggesting the prevalence of recruitment by seed. Further, we present a conceptual model describing modes of recruitment in relation to the abiotic environment. Climate change may be alleviating abiotic stress so that resources are available for more frequent recruitment by seed. Such changes have widespread implications for ecosystem structure and functioning, including species composition, wildlife habitat, biogeochemical cycling, and surface energy balance.

URLhttp://dx.doi.org/10.1657/1938-4246-42.4.406
DOI10.1657/1938-4246.42.4.406
Short TitleClonal diversity in an expanding community of arctic Salix spp. and a model for recruitment modes of arctic plants