RaymondMunsonRuelEtAl2006

Référence

Raymond, P., Munson, A.D., Ruel, J.-C., Coates, K.D. (2006) Spatial patterns of soil microclimate, light, regeneration, and growth within silvicultural gaps of mixed tolerant hardwood - white pine stands. Canadian Journal of Forest Research, 36(3):639-651.

Résumé

Large gaps (equivalent to twice the height of the trees, 1590 m(2)) originating from group selection cutting in mixed tolerant hardwood - eastern white pine (Pinus strobus L.) stands of Quebec were used for geostatistical analysis of the seasonal mean of daily percent photosynthetic photon flux density (PPFD, which measures the quantity of light above the shrub layer, varied according to the north-south axis, the maximum being located in the northern portion of gaps. Surficial soil (5 cm) temperature and moisture varied according to both north-south and east-west axes. The southwest sector offered favourable conditions for white pine, yellow birch, and paper birch establishment, with maximum soil moisture and minimum soil temperature encountered in this position. There was no evidence of gap partitioning at the early establishment stage, although asymmetry in the microclimate was observed. However, results indicate that spatial patterns could change in the future and a partition resulting from differential survival among species could occur. Finally, results outline a possible discordance between optimal regeneration and growth niches for white pine, since planted seedlings (> 1 m) had the best growth in the central and northern section of gaps.

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@ARTICLE { RaymondMunsonRuelEtAl2006,
    AUTHOR = { Raymond, P. and Munson, A.D. and Ruel, J.-C. and Coates, K.D. },
    TITLE = { Spatial patterns of soil microclimate, light, regeneration, and growth within silvicultural gaps of mixed tolerant hardwood - white pine stands },
    JOURNAL = { Canadian Journal of Forest Research },
    YEAR = { 2006 },
    VOLUME = { 36 },
    PAGES = { 639-651 },
    NUMBER = { 3 },
    NOTE = { Times Cited: 0 Article English Cited References Count: 56 040yn },
    ABSTRACT = { Large gaps (equivalent to twice the height of the trees, 1590 m(2)) originating from group selection cutting in mixed tolerant hardwood - eastern white pine (Pinus strobus L.) stands of Quebec were used for geostatistical analysis of the seasonal mean of daily percent photosynthetic photon flux density (PPFD, which measures the quantity of light above the shrub layer, varied according to the north-south axis, the maximum being located in the northern portion of gaps. Surficial soil (5 cm) temperature and moisture varied according to both north-south and east-west axes. The southwest sector offered favourable conditions for white pine, yellow birch, and paper birch establishment, with maximum soil moisture and minimum soil temperature encountered in this position. There was no evidence of gap partitioning at the early establishment stage, although asymmetry in the microclimate was observed. However, results indicate that spatial patterns could change in the future and a partition resulting from differential survival among species could occur. Finally, results outline a possible discordance between optimal regeneration and growth niches for white pine, since planted seedlings (> 1 m) had the best growth in the central and northern section of gaps. },
    KEYWORDS = { species-diversity temperate forest british-columbia canopy gaps tree seeds dynamics size disturbance understory resources },
    OWNER = { brugerolles },
    TIMESTAMP = { 2007.12.05 },
}

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