KembelDale2006

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Kembel, S.W. and Dale, M.R.T. (2006) Within-stand spatial structure and relation of boreal canopy and understorey vegetation. Journal of Vegetation Science, 17(6):783-790. (Scopus )

Résumé

Question: How do spatial patterns and associations of canopy and understorey vegetation vary with spatial scale along a gradient of canopy composition in boreal mixed-wood forests, from younger Aspen stands dominated by Populus tremuloides and P. balsamifera to older Mixed and Conifer stands dominated by Picea glauca? Do canopy evergreen conifers and broadleaved deciduous trees differ in their spatial relationships with understorey vegetation? Location: EMEND experimental site, Alberta, Canada. Methods: Canopy and understorey vegetation were sampled in 28 transects of 100 contiguous 0.5 m x 0.5 m quadrats in three forest stand types. Vegetation spatial patterns and relationships were analysed using wavelets. Results: Boreal mixed-wood canopy and understorey vegetation are patchily distributed at a range of small spatial scales. The scale of canopy and understorey spatial patterns generally increased with increasing conifer presence in the canopy. Associations between canopy and understorey were highly variable among stand types, transects and spatial scales. Understorey vascular plant cover was generally positively associated with canopy deciduous tree cover and negatively associated with canopy conifer tree cover at spatial scales from 5-15 m. Understorey non-vascular plant cover and community composition were more variable in their relationships with canopy cover, showing both positive and negative associations at a range of spatial scales. Conclusions: The spatial structure and relation of boreal mixed-wood canopy and understorey vegetation varied with spatial scale. Differences in understorey spatial structure among stand types were consistent with a nucleation model of patch dynamics during succession in boreal mixed-wood forests. © IAVS; Opulus Press.

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@ARTICLE { KembelDale2006,
    AUTHOR = { Kembel, S.W. and Dale, M.R.T. },
    TITLE = { Within-stand spatial structure and relation of boreal canopy and understorey vegetation },
    JOURNAL = { Journal of Vegetation Science },
    YEAR = { 2006 },
    VOLUME = { 17 },
    PAGES = { 783-790 },
    NUMBER = { 6 },
    ABSTRACT = { Question: How do spatial patterns and associations of canopy and understorey vegetation vary with spatial scale along a gradient of canopy composition in boreal mixed-wood forests, from younger Aspen stands dominated by Populus tremuloides and P. balsamifera to older Mixed and Conifer stands dominated by Picea glauca? Do canopy evergreen conifers and broadleaved deciduous trees differ in their spatial relationships with understorey vegetation? Location: EMEND experimental site, Alberta, Canada. Methods: Canopy and understorey vegetation were sampled in 28 transects of 100 contiguous 0.5 m x 0.5 m quadrats in three forest stand types. Vegetation spatial patterns and relationships were analysed using wavelets. Results: Boreal mixed-wood canopy and understorey vegetation are patchily distributed at a range of small spatial scales. The scale of canopy and understorey spatial patterns generally increased with increasing conifer presence in the canopy. Associations between canopy and understorey were highly variable among stand types, transects and spatial scales. Understorey vascular plant cover was generally positively associated with canopy deciduous tree cover and negatively associated with canopy conifer tree cover at spatial scales from 5-15 m. Understorey non-vascular plant cover and community composition were more variable in their relationships with canopy cover, showing both positive and negative associations at a range of spatial scales. Conclusions: The spatial structure and relation of boreal mixed-wood canopy and understorey vegetation varied with spatial scale. Differences in understorey spatial structure among stand types were consistent with a nucleation model of patch dynamics during succession in boreal mixed-wood forests. © IAVS; Opulus Press. },
    COMMENT = { Cited By (since 1996): 9 Export Date: 17 September 2012 Source: Scopus CODEN: JVESE doi: 10.1658/1100-9233(2006)17[783:WSSARO]2.0.CO;2 },
    ISSN = { 11009233 (ISSN) },
    KEYWORDS = { Mixed-wood, Picea glauca, Populus, Spatial pattern, Spatial scale, Wavelet, boreal forest, canopy architecture, deciduous forest, evergreen forest, interspecific interaction, mixed forest, patch dynamics, spatial variation, species-area relationship, stand dynamics, stand structure, transect, understory, wavelet analysis, Alberta, Canada, North America, Coniferophyta, Picea glauca, Populus, Populus balsamifera, Populus tremuloides, Tracheophyta },
    OWNER = { Luc },
    TIMESTAMP = { 2012.09.17 },
    URL = { http://www.scopus.com/inward/record.url?eid=2-s2.0-33846928013&partnerID=40&md5=b6c3c167c7b7518df73c2769350c600e },
}

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