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Spatial patterns of cone serotiny in Pinus banksiana in relation to fire disturbance

Spatial patterns of cone serotiny in Pinus banksiana in relation to fire disturbance,10.1016/j.foreco.2003.07.040,Forest Ecology and Management,Volker

Spatial patterns of cone serotiny in Pinus banksiana in relation to fire disturbance   (Citations: 10)
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Fire disturbance effects on tree species distribution and landscape pattern have been widely studied. However, the effects of differences among fire regimes on the spatial pattern of genetic variability within a tree species have received less attention. The objectives of this study were to examine (a) whether the marked gradient in serotiny in Pinus banksiana along its southern range limit is related to differences in fire regimes and (b) at what scale serotiny varies most strongly in P. banksiana in the US Midwest. P. banksiana in the 450,000ha Pine Barrens area in northwestern Wisconsin, USA showed a marked broad scale pattern in serotiny. The percentage of serotinous trees was highest in the northeast (mean 83%, S.D. 13.5) and lowest in the southwest (mean 9%, S.D. 3.7). Historic fire regimes were inferred from pre-European settlement (mid-1800s) vegetation data. Serotiny was highest in pine forests that exhibited stand-replacing fires, and lowest in savannas where more frequent but less intense ground fires occurred. The data presented in this study suggest possible spatial control of genetic variability within a tree species by an ecological process (disturbance) at the landscape-scale.
Journal: Forest Ecology and Management - FOREST ECOL MANAGE , vol. 189, no. 1, pp. 133-141, 2004
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    • ...Tree densities were often low (Curtis 1959; Radeloff et al. 1999), due to fire (Radeloff et al. 2004), and poor soil conditions (Hole 1976)...
    • ...Low-severity fires probably originally shaped the oak and pine savannas and woodlands at the southern end of the sand plain (Radeloff et al. 2004)...
    • ...Historic ‘‘true barrens’’ may have remained free of trees for relatively long periods (at least five years) due to a variety factors including repeated fires (Radeloff et al. 2004), drought and competition from Carex sp. or shrubs (Abrams et al. 1985), all of which could have limited tree establishment...
    • ...Before European settlement, there were extensive woodlands and savannas, and jack pine densities were highly variable at that time as well (Radeloff et al. 1999, 2004)...

    Emilie B. Grossmannet al. Open woodland and savanna decline in a mixed-disturbance landscape (19...

    • ...Fire provides services to conifer forests such as preparing a seedbed, recycling nutrients, regulating successional patterns, and influencing age and species mosaics (Kilgore, 1973; Parsons and DeBenedetti, 1979; Neary et al., 1999; Borchert et al., 2003; Radeloff et al., 2003; Stephens and Fry, 2005)...

    Janet Franklinet al. Impact of a high-intensity fire on mixed evergreen and mixed conifer f...

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