Effect of gap size, aspect and slope on available light and soil temperature after patch-selection cutting in yellow birch–conifer stands, Quebec, Canada

Prévost, Marcel; Raymond, Patricia

doi:10.1016/j.foreco.2012.02.020

Cited by 60 publications

(27 citation statements)

References 47 publications

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“…6). In clear days PAR penetration depends signifi cantly on stand structure (eff ect of sunfl ecks and penumbra eff ect) (Gendron et al, 2001;Matthew et al, 2003;Hardy et al, 2004;Yirdaw and Luukkanen, 2004;Leuchner et al, 2011;Nilson et al, 2011;Prévost and Raymond, 2012). Signifi cantly diff erent correlations in the 4 th phenological phase, both in clear and in overcast day, could be due to a lower sun elevation, and therefore diff erent PAR penetration into the stand canopy.…”

Section: Resultsmentioning

confidence: 99%

“…(Baldocchi and Collineau, 1994;Gendron et al, 2001;Hamberg et al, 2009). Measurement of solar radiation below the forest canopy can characterize plant growth and morphology, estimates plant competition and documents temporal changes in plant structure (Gendron et al, 1998;Gendron et al, 2001;Prévost and Raymond, 2012). The aim of this article is to describe transmittance of young Norway spruce stand canopy for photosynthetically active radiation during the growing season and at the diff erent sky conditions.…”

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Transmittance of young Norway spruce stand canopy for photosynthetically active radiation during the growing season

Marková¹,

Kubásek²

2013

Acta Univ. Agric. Silvic. Mendelianae Brun.

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MARKOVÁ IRENA, KUBÁSEK JIŘÍ: Transmittance of young Norway spruce stand canopy for photosynthetically active radiation during the growing season. Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis, 2013, LXI, No. 1, pp. 129-135 Analysis of transmittance of young Norway spruce stand canopy for photosynthetically active radiation (PAR) was made at the study site of Bílý Kříž (the Moravian-Silesian Beskids Mts., the Czech Republic) at diff erent sky conditions during the growing season in 2010. For the description of PAR transmittance diff erent phenological phases of the spruce stand development in clear and overcast days were chosen. The mean daily PAR transmittance of the spruce canopy was signifi cantly higher in overcast days compared with clear ones. Diff use PAR thus penetrated into lower parts of the canopy more effi ciently than direct one. PAR transmittance of young Norway spruce stand canopy was diff erent in individual phenological phases of the spruce stand canopy which was caused by changes in the stand structure during the growing season. Thus monitoring of transmittance of young Norway spruce stand canopy for PAR can help to describe the development of spruce stand canopy. overcast and clear days, phonological phases

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Section: Resultsmentioning

confidence: 99%

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confidence: 99%

Transmittance of young Norway spruce stand canopy for photosynthetically active radiation during the growing season

Marková¹,

Kubásek²

2013

Acta Univ. Agric. Silvic. Mendelianae Brun.

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“…These factors increased transmittance to the southern quadrant. Prévost and Raymond (2012) examined solar radiation (MJ m -2 ) in two temperate mixedwood stands (47°N, 72°W) similar to the ones we studied. They found that the southern quadrant of northern aspects received 40% to 50% less radiation than all other quadrants of northern aspects.…”

Section: Discussionmentioning

confidence: 99%

White spruce(Picea glauca)restoration in temperate mixedwood stands using patch cuts and enrichment planting

HébertFrançois

RoyVincent

AugerIsabelle

et al. 2013

The Forestry Chronicle

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The use of gap-based silviculture and enrichment planting was tested in temperate mixedwood forests in eastern Canada. Four different sizes of canopy opening or patch cuts were applied to six stands in the maple-birch domain of Quebec. We evaluated the influence of opening size, cardinal quadrant within the opening, and distance from the forest edge of openings on white spruce height and ground-level diameter (GLD) five years after enrichment planting. At ≥5 m from the edge, initial canopy transmittance was generally >60% in all four canopy treatments. White spruce seedling height and GLD were lower within 10 m from the edge, and generally increased where understory light levels were higher. Seedling survival, height, and GLD in the smallest opening (0.05 ha) were comparable or higher than those found in relatively larger openings. The 0.05-ha opening that more closely emulates natural canopy gaps of temperate mixedwood forests provided satisfactory seedling development, and is therefore compatible with a gap-based stand dynamics approach to management of mixedwood stands in Quebec.Keywords: enrichment planting, ecosystem-based forest management, gap dynamics, temperate mixedwood stand, white spruce restoration résumé L'utilisation de la sylviculture par trouées et de la plantation d' enrichissement a été mise à l' essai dans les forêts mixtes tempérées de l' est du Canada. Quatre tailles différentes d' ouverture du couvert ou de trouées ont été appliquées à six peuplements dans le domaine de l' érablière à bouleau jaune du Québec. Nous avons évalué l'influence de la taille de l' ouverture, du quadrant cardinal dans l' ouverture et de la distance des semis à la lisière de la forêt sur la hauteur et le diamètre au niveau du sol (GLD) de l' épinette blanche, cinq ans après la plantation d' enrichissement. À ≥ 5 m du bord, la transmittance du couvert initial était généralement > 60 % dans les quatre traitements du couvert. La hauteur des semis d' épinette blanche et leur GLD étaient moins élevés à 10 m du bord, et tendaient à augmenter lorsque les niveaux de lumière dans le sous-bois étaient plus élevés. La survie des semis, leur hauteur et leur GLD dans les plus petites ouvertures (0,05 ha) étaient comparables ou supérieures à celles trouvées dans les ouvertures relativement plus grandes. L' ouverture de 0,05 ha qui imite de plus près les trouées naturelles dans le couvert des forêts tempérées mixtes a donné un développement de semis satisfaisant, et est donc compatible avec une approche basée sur la dynamique des trouées pour l'aménagement des peuplements mixtes au Québec.Mots-clés : plantation d' enrichissement, aménagement écosystémique, dynamique des trouées, peuplement mixte tempéré, restauration de l' épinette blanche.

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“…The onset of cambial activity and cell differentiation are mainly determined by temperature (Begum et al 2013;Rossi et al 2007Rossi et al , 2011; hence the higher spring temperature after thinning promotes earlier growth startup and extends the growing season (Linares et al 2009;Rossi et al 2011). Moreover, thinning also increases the availability of water and nutrient in soil (Jiang et al 2011;McDowell et al 2003;Prevost and Raymond 2012). Using carbon isotope for tree-ring study, McDowell et al (2003) confirmed that the improving soil moisture availability after thinning increased the radial growth of remained trees in the arid region.…”

Section: Introductionmentioning

confidence: 95%

Effects of gap-model thinning intensity on the radial growth of gap-edge trees with distinct crown classes in a spruce plantation

Zhao

Pang

Bao

et al. 2015

Trees

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Key message Radial growth responses of gap-edge trees to GT intensity greatly depends on microclimate condition (soil temperature and PAR) within gaps and their abilities in competing and utilizing the limited resources. Abstract Gap-model thinning (GT) is an effective management technique to improve the productivity of dense monoculture plantation. However, how GT intensity influence inter-and intra-annual radial growth of the gapedge trees remains an open question. In order to explore this question, we implemented an experiment with four treatments (control and gap sizes of 74, 109, and 196 m 2 ) in a 30-year-old spruce (Picea asperata) plantation in 2008. We used dendrochronological method to explore dynamic of the basal area increment (BAI) of gap-edge trees (n = 127) from 2009 to 2012 after GT treatments. We found that effects of GT on the BAI of gap-edge trees highly depended on GT intensity and their crown classes. The large gaps significantly increased the BAI of gap-edge trees and further the latewood growth responded more sensitively than the earlywood, whereas the influences of the small and intermediate gaps were weak; the large gaps effectively improved the BAI of the dominant trees, following by the intermediate, but not for the suppressed trees. Our results also displayed that the earlywood increment was strongly related to the soil temperature in spring and the latewood formation was influenced by the photosynthetically active radiation in autumn. It was eventually concluded that dynamic radial growth of gap-edge trees were driven by the improved microclimate caused by GT and their abilities in competing and utilizing resources. The present study highlights the importance of setting appropriate GT intensity and choosing the felled trees in GT operation.

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Effect of gap size, aspect and slope on available light and soil temperature after patch-selection cutting in yellow birch–conifer stands, Quebec, Canada

Cited by 60 publications

References 47 publications

Transmittance of young Norway spruce stand canopy for photosynthetically active radiation during the growing season

Transmittance of young Norway spruce stand canopy for photosynthetically active radiation during the growing season

White spruce(Picea glauca)restoration in temperate mixedwood stands using patch cuts and enrichment planting

Effects of gap-model thinning intensity on the radial growth of gap-edge trees with distinct crown classes in a spruce plantation

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