NamroudParkTremblayEtAl2005

Référence

Namroud, M.C., Park, A., Tremblay, M.F. and Bergeron, Y. (2005) Clonal and spatial genetic structures of aspen (Populus tremuloides Michx.). Molecular Ecology, 14(10):2969-2980.

Résumé

To portray aspen clonal and spatial genetic structures, we mapped and genotyped trees in two 1-ha plots, each containing three aspen cohorts originating from fire or subsequent secondary disturbances. We used four microsatellite loci to identify aspen clones and increment core analysis to determine tree age. Clonal dimensions were measured by the maximum distance between two ramets and the number of ramets per genet. Standard normal deviate (SND) was used to assess the spatial distribution of aspen genets and cohorts, and multivariate spatial genetic autocorrelations to assess the spatial distribution of aspen genetic variation. Most aspen genets consisted of only one ramet (> 75%). Median clonal dimensions were 19 and 29 m (maxima: 104 and 72 m in the two plots). No segregation was observed between clones. Aspen cohorts were spatially segregated but trees were spatially aggregated within old and medium-aged cohorts. In contrast, trees were more randomly distributed within the youngest cohorts. This coincided with a spatial genetic autocorrelation at small scales (up to 30 m) in the older cohorts and a more random genetic distribution in the youngest ones. Our results suggest that aspen spatial genetic structuring reflects the spatial patterns produced by the regeneration of discrete cohorts at different stages of succession. Vegetative reproduction leads to aspen genetic spatial structuring at small scales (few metres) until midsuccession. However, as the stand gets older, the spatial distribution of aspen trees and genetic structure evolve from a structured pattern to a more random one under a gap disturbances regime. © 2005 Blackwell Publishing Ltd.

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@ARTICLE { NamroudParkTremblayEtAl2005,
    AUTHOR = { Namroud, M.C. and Park, A. and Tremblay, M.F. and Bergeron, Y. },
    TITLE = { Clonal and spatial genetic structures of aspen (Populus tremuloides Michx.) },
    JOURNAL = { Molecular Ecology },
    YEAR = { 2005 },
    VOLUME = { 14 },
    PAGES = { 2969-2980 },
    NUMBER = { 10 },
    NOTE = { 09621083 (ISSN) Cited By (since 1996): 3 Export Date: 25 April 2007 Source: Scopus CODEN: MOECE doi: 10.1111/j.1365-294X.2005.02653.x Language of Original Document: English Correspondence Address: Namroud, M.-C.; Chaire AFD; Universite? du Que?bec en Abitibi-Te?miscamingue; 445 boul. de, l'Universite? Rouyn-Noranda, Que. J9X 5E4, Canada; email: marie-claire.namroud@uqat.ca Chemicals/CAS: DNA, 9007-49-2; DNA, 9007-49-2 References: Barnes, B.V., The clonal growth habit of American aspens (1966) Ecology, 47, pp. 439-447; Belkhir, K., Borsa, P., Chikhi, L., Raufaste, N., Bonhomme, F., (2004) Genetix Version 4.05, Logiciel Sous Windows TM Pour la Ge?ne?tique des Populations., , Laboratoire Ge?nome, Populations, Interactions, CNRS UMR 5000, Universite? de Montpellier II, Montpellier, France; Bergeron, Y., The influence of island and mainland landscapes on boreal forest fire regimes (1991) Ecology, 72, pp. 1980-1992; Bergeron, Y., Species and stand dynamics in the mixed woods of Quebec's southern boreal forest (2000) Ecology, 81, pp. 1500-1516; Bergeron, Y., Charron, D., Postfire stand dynamics in a southern boreal forest (Que?bec): A dendroecological approach (1994) Ecoscience, 1, pp. 173-184; Bergeron, Y., Dubuc, M., Succession in the southern part of the Canadian boreal forest (1989) Vegetatio, 79, pp. 51-39; Birch, C., The influence of position on genet growth: A simulation of a population of bracken (Pteridium aquilinum (L.) Kuhn) genets under grazing (2002) Evolutionary Ecology, 15, pp. 463-483; Cheplik, G.P., Responses to severe competition stress in a clonal plant: Differences between phenotypes (1997) Oikos, 79, pp. 581-591; Chung, M.G., Epperson, B.K., Clonal and spatial genetic structure in Eurya emarginata (Theaceae) (2000) Heredity, 84, pp. 170-177; Chung, M.G., Chung, J.M., Chung, M.Y., Epperson, B.K., Spatial distribution of allozyme polymorphisms following clonal and sexual reproduction in populations of Rhus javanica (Anacardiaceae) (2000) Heredity, 84, pp. 178-185; Cronberg, N., Colonization dynamics of the clonal moss Hyloconium splendens on islands in a Baltic land uplift area: Reproduction, genet distribution and genetic variation (2002) Journal of Ecology, 90, pp. 925-935; Cumming, S.G., Schmiegelow, F.K.A., Burton, P.J., Gap dynamics in boreal aspen stands: Is the forest older than we think? (2000) Ecological Applications, 10, pp. 744-759; Dansereau, P.R., Bergeron, Y., Fire history in the southern boreal forest of northwestern Quebec (1993) Canadian Journal of Forest Research, 23, pp. 25-32; Dayanandan, S., Rajora, O.P., Bawa, K.S., Isolation and characterization of microsatellites in trembling aspen (Populus tremuloides) (1998) Theoretical and Applied Genetics, 96, pp. 950-956; Epperson, B.K., Spatial autocorrelation of genotypes under directional selection (1990) Genetics, 124, pp. 757-771; Epperson, B.K., Recent advances in correlation analysis of spatial patterns of genetic variation (1993) Evolutionary Biology, 27, pp. 95-155; Erickson, D., Hamrick, J., Genetic and clonal diversity for Myrica cerifera along a spatiotemporal island chronosequence (2003) Heredity, 90, pp. 25-32; Gregorius, H.R., The relationship between the concepts of genetic diversity and differentiation (1987) Theoretical and Applied Genetics, 74, pp. 397-401; Ha?mmerli, A., Reusch, T.B.H., Inbreeding depression influences genet size distribution in a marine angiosperm (2003) Molecular Ecology, 12, pp. 619-629; Kemperman, J.A., Barnes, B.V., Clone size in American aspens (1976) Canadian Journal of Botany, 54, pp. 2603-2607; Kneeshaw, D., Bergeron, Y., Ecological factors affecting the abundance of advance regeneration in Que?bec's southwestern boreal forest (1996) Canadian Journal of Forest Research, 26, pp. 888-898; Kneeshaw, D., Bergeron, Y., Canopy gap characteristics and tree replacement in the Southeastern boreal forest (1998) Ecology, 79, pp. 783-794; Kreher, S.A., Fore?, S.A., Collins, B.S., Genetic variation within and among patches of the clonal species, Vaccinium stamineum L (2002) Molecular Ecology, 9, pp. 1247-1252; Kudoh, H., Shibaike, H., Taksu, H., Whigham, D.F., Kawando, S., Genet structure and determinants of clonal structure in a temperate deciduous woodland herb, Uvularia perfoliata (1999) Journal of Ecology, 87, pp. 244-257; Little, L.R., Dale, M.R.T., A method for analyzing spatio-temporal pattern in plant establishment, tested on a Populus balsamifera clone (1999) Journal of Ecology, 87, pp. 620-627; Marshall, T.C., Slate, J., Kruuk, L.E.B., Pemberton, J.M., Statistical confidence for likelihood-based paternity inference in natural populations (1998) Molecular Ecology, 7, pp. 639-655; Mitton, J.B., Grant, M.C., Genetic variation and the natural history of quaking aspen (1996) BioScience, 46, pp. 25-31; Morin, H., Laprise, D., Bergeron, Y., Chronology of spruce budworm outbreaks in the Lake Duparquet region, Abitibi, Que?bec (1993) Canadian Journal of Forest Research, 23, pp. 1497-1506; Paetkau, D., Shields, G.F., Strobeck, C., Gene flow between insular, coastal and interior populations of brown bears in Alaska (1998) Molecular Ecology, 7, pp. 1283-1292; Park, A., Kneeshaw, D., Bergeron, Y., Leduc, A., (2005) Spatial Relationships and Tree Species Associations Across a 236-year Boreal Mixed Wood Chronosphere, 35, pp. 750-761. , Canadian Journal of Forest Research; Peakall, R., Smouse, P.E., (2001) Genalex (Version 5): Genetic Analysis in Excel. Population Genetic Software for Teaching and Research., , http://www.anu.edu.au/BoZo/GenAlEx/, Australian National University, Canberra; Perala, D.A., (1990) Populus Tremuloides Michx, pp. 555-569. , In: Silvics of North America, 2. Hardwoods. USDA Forest Service, pp. Washington, D.C; Pielou, E.C., (1969) An Introduction to Mathematical Ecology., , John Wiley, New York; Pleasants, J.M., Wendel, J.F., Genetic diversity in a clonal narrow endemic, Erythronium propullans, and in its widespread progenitor, Erythronium albidium (1989) American Journal of Botany, 76, pp. 1136-1151; Romme, W.H., Turner, M.G., Gardner, R.H., A rare episode of sexual reproduction in aspen (Populus tremuloides) following the 1988 Yellowstone fires (1997) Natural Areas Journal, 17, pp. 17-25; Schier, G.A., (1975) Deterioration of Aspen Clones in the Middle Rocky Mountains., , USDA Forest Service, Intermountain Forest and Range Experiment Station, Ogden, Utah; Smouse, P.E., Peakall, R., Spatial autocorrelation analysis of individual mutliallele and multilocus genetic structure (1999) Heredity, 82, pp. 51-573; Sokal, R.R., Oden, N.L., Spatial autocorrelation in biology. I. Methodology (1978) Biological Journal of the Linnean Society, 10, pp. 199-228; Takahashi, M., Psawind (version 1.1.1): A program for calculating spatial indices (2003) Journal of Heredity, 94, pp. 267-270; Waits, L., Luikart, G., Taberlet, P., Estimating the probability of identity among genotypes in natural populations: Cautions and guidelines (2001) Molecular Ecology, 10, pp. 249-256; Weir, B., Cockerham, C.C., Estimating F-statistics for the analysis of population structure (1984) Evolution, 38, pp. 1358-1370; Wyman, J., Bruneau, A., Tremblay, M.F., Microsatellite analysis of genetic diversity in four populations of Populus tremuloides in Quebec (2003) Canadian Journal of Botany, 81, pp. 360-367; Yeh, F., Chong, D., Yang, R., RAPD variation within and among natural populations of trembling aspen (Populus tremuloides, Michx.) from Alberta (1995) Journal of Heredity, 86, pp. 454-460. , This research was conducted at the NSERC/UQAT/UQAM Industrial Chair in Sustainable Forest Management and is part of a PhD thesis by Marie-Claire Namroud. Genetic analyses were done in F. Tremblay's laboratory. Y. Bergeron's research focuses on forest ecosystem dynamics, primarily in boreal forests. Dr Park was a postdoctoral fellow at the Groupe de Recherche en E?cologie Forestie?re Interunivesritaire (GREFI). The long-term objective of this research is to better understand the factors controlling the natural dynamic of mixed boreal forest. },
    ABSTRACT = { To portray aspen clonal and spatial genetic structures, we mapped and genotyped trees in two 1-ha plots, each containing three aspen cohorts originating from fire or subsequent secondary disturbances. We used four microsatellite loci to identify aspen clones and increment core analysis to determine tree age. Clonal dimensions were measured by the maximum distance between two ramets and the number of ramets per genet. Standard normal deviate (SND) was used to assess the spatial distribution of aspen genets and cohorts, and multivariate spatial genetic autocorrelations to assess the spatial distribution of aspen genetic variation. Most aspen genets consisted of only one ramet (> 75%). Median clonal dimensions were 19 and 29 m (maxima: 104 and 72 m in the two plots). No segregation was observed between clones. Aspen cohorts were spatially segregated but trees were spatially aggregated within old and medium-aged cohorts. In contrast, trees were more randomly distributed within the youngest cohorts. This coincided with a spatial genetic autocorrelation at small scales (up to 30 m) in the older cohorts and a more random genetic distribution in the youngest ones. Our results suggest that aspen spatial genetic structuring reflects the spatial patterns produced by the regeneration of discrete cohorts at different stages of succession. Vegetative reproduction leads to aspen genetic spatial structuring at small scales (few metres) until midsuccession. However, as the stand gets older, the spatial distribution of aspen trees and genetic structure evolve from a structured pattern to a more random one under a gap disturbances regime. © 2005 Blackwell Publishing Ltd. },
    KEYWORDS = { Aspen Clone Cohort Fire Gaps Spatial genetic structure Populus Populus tremuloides },
    OWNER = { brugerolles },
    TIMESTAMP = { 2007.12.05 },
}

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