Microclimatic and spruce growth gradients adjacent to young aspen stands

Voicu, Mihai; Comeau, Philip G.

doi:10.1016/j.foreco.2005.09.016

Cited by 39 publications

(32 citation statements)

References 54 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Results from studies examining light, temperature and soil moisture patterns adjacent to aspen patches (Voicu and Comeau 2006) suggest that the ideal width of spruce patches over the rotation is likely to be 10 m to 15 m. Since average treated strip width was only 5.8 m in this study, with only one plot having a strip above 7 m in width, spruce growth responses are likely smaller than could be possible with wider strips. Treating plantations at younger ages might also increase growth responses (Wagner et al 1999).…”

Section: Discussionmentioning

confidence: 77%

“…Aspen cover can reduce frost damage of white spruce (Groot and Carlson 1996, Pritchard and Comeau 2004, Voicu and Comeau 2006, Filipescu and Comeau 2011, suppress growth of other competitors (such as Calamagrostis canadensis [Michx.] Beauv.…”

Section: Introductionmentioning

confidence: 99%

“…Beauv. ; Lieffers and Stadt 1994, Groot and Carlson 1996, Groot 1999, Voicu and Comeau 2006, and reduce damage to spruce due to white pine weevil (Pissodes strobi Peck; Taylor et al 1996). Long-term site productivity may also be enhanced by the presence of aspen (Pastor 1990, Légaré et al 2005.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effects of aerial strip spraying on mixedwood stand structure and tree growth

Comeau

2014

The Forestry Chronicle

View full text Add to dashboard Cite

Herbicide application in strips offers a cost-effective way to accelerate spruce growth in young mixedwood stands, while also retaining the mixedwood character of the stand. In June of 2006 data were collected to evaluate the effects of aerial strip spraying on subsequent growth of treated stands. These blocks had been planted in 1991 and treated in 2000 with Triclopyr ester herbicide applied in strips. Treated and untreated strips averaged 5.8 m and 8.4 m in width, respectively, with 38% of the block area being effectively treated. In 2006 aspen density, DBH, and height were significantly lower in the treated strips compared to either untreated strips or completely untreated blocks. Spruce growth was significantly larger in treated strips with diameter growth responses beginning in the first and height growth responses in the second growing season following treatment. Yield estimates from the Mixedwood Growth Model (MGM) indicate that the strip spray treatments result in the highest spruce yields. However, when understory protection (harvesting aspen at age 70 and spruce at 120) is applied, the untreated blocks provided higher total yield and net present value.Keywords: white spruce, trembling aspen, boreal mixedwoods, triclopyr, strip spray, yield , la densité, le dhp et la hauteur des trembles ont été significativement moindres dans les bandes traitées comparativement aux bandes intactes ou par rapport aux parcelles non traitées. La croissance des épinettes a été significativement plus importante dans les bandes traitées affichant des réactions au niveau de la croissance en diamètre en premier lieu et en hauteur à la deuxième année de croissance suivant le traitement. Les rendements estimés à partir du modèle de croissance des peuplements mélangés (MGM) indiquent que les traitements de pulvérisation par bandes permettent d' obtenir les plus forts rendements en épinette. Cependant, lorsque la protection du sousétage est retenue (récolte du tremble à l'âge de 70 ans et de l' épinette à 120 ans), les parcelles non traitées ont affiché un rendement total plus élevé et une valeur actualisée nette supérieure.Mots clés : épinette blanche, peuplier faux-tremble, peuplements mélangés nordiques, triclopyr

show abstract

Section: Discussionmentioning

confidence: 77%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effects of aerial strip spraying on mixedwood stand structure and tree growth

Comeau

2014

The Forestry Chronicle

View full text Add to dashboard Cite

show abstract

“…The presence of a residual canopy reduces light intensity and limits competition from undesirable shade-intolerant species, while protecting advance regeneration from environmental extremes (Lundmark and Hallgren 1987, Groot et al 1997, Orlander and Karlson 2000, Lazarus et al 2004, Pritchard and Comeau 2004, Voicu and Comeau 2006). However, the major impediment to managing red spruce under any partial harvest system has long been the risk of catastrophic windthrow, especially in dense stands (Westveld 1953, see Busing 2004.…”

Section: Shelterwood Cuttingmentioning

confidence: 99%

Management for red spruce conservation in Québec: The importance of some physiological and ecological characteristics – A review

Dumais¹,

Prévost²

2007

The Forestry Chronicle

View full text Add to dashboard Cite

The physiological and ecological characteristics of red spruce (Picea rubens Sarg.) are reviewed and integrated into ecosystem management options. Red spruce is a shade-tolerant, late-successional conifer species found in the temperate forests of northeastern North America. Its wood, being of excellent quality, is prized by the forest industry. Unfortunately, this high-value species has been in decline throughout its entire range for the past 50 years. At high elevations, in northeastern United States, crown dieback caused by the combined effect of atmospheric pollution and climate is largely responsible of this decline. In other areas, such as Québec (Canada), the scarcity of red spruce is mainly caused by forest management practices that are poorly adapted to the species' ecophysiology. Many physiological studies have shown that the species is sensitive to full sunlight (at juvenile and advance growth stages), high temperatures and frost. It also has particular microsite requirements for seed germination and early seedling establishment, such as the presence of large decaying woody debris. Hence, a management strategy adapted for red spruce should favour the use of partial cutting, maintaining some overstory and dead wood. This will emulate the natural dynamics of small canopy gaps and minimize the physiological stresses to regeneration. The ecophysiological aspects of natural and artificial regeneration of red spruce should be examined with respect to the increased use of partial cutting techniques.Keys words: advance regeneration, balsam fir (Abies balsamea L.), ecophysiology, ecosystem management, frost susceptibility, light response, microenvironment, red spruce (Picea rubens Sarg.), seedling establishment, shade tolerance, silvicultural systems, thermosensitivity RÉSUMÉ Les caractéristiques physiologiques et écologiques de l'épinette rouge (Picea rubens Sarg.) sont révisées et intégrées dans des options d'aménagement écosystémique. L'épinette rouge est un conifère tolérant à l'ombre et de fin de succession que l'on retrouve dans les forêts tempérées du nord-est de l'Amérique du Nord. Son bois, d'excellente qualité, est recherché par l'industrie forestière. Depuis 50 ans, cette essence de grande valeur a malheureusement connu un déclin sur l'ensemble de son aire de répartition. En haute altitude, dans le nord-est des États-Unis, le dépérissement de la cime causé par l'effet combiné de la pollution atmosphérique et du climat est en grande partie responsable de ce déclin. En d'autres endroits, comme au Québec (Canada), la raréfaction de l'épinette rouge est surtout attribuable à des pratiques d'aménagement forestier peu adaptées à son écophysiologie. Plusieurs études physiologiques ont montré que cette espèce est sensible à la pleine lumière (aux stades juvénile et de régénération préétablie), aux températures élevées et au gel. Elle requiert aussi des microsites particuliers, comme les gros débris ligneux en décomposition, pour la germination des graines et l'établissement initial des semis. Ainsi, ...

show abstract

“…Finally, overstory aspen is an effective nurse crop for understory spruce by moderating the rate of radiative heat loss from the ground to the night sky, and slowing the transfer of soil heat toward the ground surface [31], reducing the incidence of growing season frost and environmental extremes [32][33][34][35]. It also reduces the vigor of other competitors such as bluejoint reedgrass (Calamagrostis canadensis (Michx.)…”

Section: Introductionmentioning

confidence: 99%

Managed Mixtures of Aspen and White Spruce 21 to 25 Years after Establishment

Kabzems

Bokalo

Comeau

et al. 2015

Forests

View full text Add to dashboard Cite

Intimate mixtures of trembling aspen (Populus tremuloides Michx.) and white spruce (Picea glauca (Moench) Voss) are a key feature of western Canadian boreal forests. These mixtures have the potential to produce high yields of merchantable fibre and provide numerous ecological services. Achievement of this potential has been difficult, and often expensive, to realize as a regeneration goal in managed forests. We report 21 to 25 year results of managed mixtures on two study sites where the white spruce was planted, and the density of aspen natural regeneration manipulated within five years of the stand initiation disturbance. On both sites, white spruce mortality did not increase with increasing aspen density. While height and diameter growth of white spruce declined with increasing aspen density, the effect was not entirely consistent across the two sites. Abrasion from aspen branches was the most common source of damage to spruce crowns. Mixed stands had greater merchantable volume production than pure spruce stands based on model projections. Application of aspen harvest at year 60, while protecting the spruce component for a second harvest entry at year 90, was projected to optimize combined yield for the mixedwood stands.

show abstract

Microclimatic and spruce growth gradients adjacent to young aspen stands

Cited by 39 publications

References 54 publications

Effects of aerial strip spraying on mixedwood stand structure and tree growth

Effects of aerial strip spraying on mixedwood stand structure and tree growth

Management for red spruce conservation in Québec: The importance of some physiological and ecological characteristics – A review

Managed Mixtures of Aspen and White Spruce 21 to 25 Years after Establishment

Contact Info

Product

Resources

About