Climate and site characteristics affect juvenile trembling aspen development in conifer plantations across southern British Columbia

Heineman, Jean L.; Sachs, Donald L.; Simard, Suzanne W.; Mather, W. Jean

doi:10.1016/j.foreco.2010.08.045

Cited by 2 publications

(1 citation statement)

References 38 publications

(49 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Weakly developed clayenriched restricting layers are also relatively common in the SBPSxc [26], so that summer drought may pose further growing season limitations to aspen growth. The annual frost-free period was also short at our SBPSxc study site (Table 1), which was associated with reduced aspen height growth in another southern British Columbia study [27].…”

Section: Discussionmentioning

confidence: 80%

Identifying and Characterizing Important Trembling Aspen Competitors with Juvenile Lodgepole Pine in Three South-Central British Columbia Ecosystems

Newsome

Heineman²,

Nemec³

2012

International Journal of Forestry Research

Self Cite

View full text Add to dashboard Cite

Critical height ratios for predicting competition between trembling aspen and lodgepole pine were identified in six juvenile stands in three south-central British Columbia ecosystems. We used a series of regression analyses predicting pine stem diameter from the density of neighbouring aspen in successively shorter relative height classes to identify the aspen-pine height ratio that maximizedR2. Critical height ratios varied widely among sites when stands were 8–12 years old but, by age 14–19, had converged at 1.25–1.5. MaximumR2values at age 14–19 ranged from 13.4% to 69.8%, demonstrating that the importance of aspen competition varied widely across a relatively small geographic range. Logistic regression also indicated that the risk of poor pine vigour in the presence of aspen varied between sites. Generally, the degree of competition, risk to pine vigour, and size of individual aspen contributing to the models declined along a gradient of decreasing ecosystem productivity.

show abstract

Section: Discussionmentioning

confidence: 80%

Identifying and Characterizing Important Trembling Aspen Competitors with Juvenile Lodgepole Pine in Three South-Central British Columbia Ecosystems

Newsome

Heineman²,

Nemec³

2012

International Journal of Forestry Research

Self Cite

View full text Add to dashboard Cite

show abstract

Lodgepole pine and trembling aspen mixedwoods: Growth and yield within 22 to 39 year old pine plantations of northern interior British Columbia

HarperGeorge

2015

The Forestry Chronicle

View full text Add to dashboard Cite

Six lodgepole pine plantations located in the Sub Boreal Spruce (SBS) biogeoclimatic zone of northern interior British Columbia were chosen to study the impacts of aspen competition on the growth and yield of lodgepole pine. The six sites from four different zonal variants (dw2, dw3, dk1 and mc2) ranged in age from 22 to 39 years. Site preparation treatments occurred on all sites: drag scarification, disking, or a broadcast burn post clear-cut logging. Four of the sites received at least one operational brushing treatment for aspen (chemical or manual). At each site, 30 pine trees (CP) were selected as plot centres to represent the observed range of aspen competition. A series of nested plots up to 7.98 m radius was used to evaluate effects of % pine composition on stand density and stand volume using linear and non-linear models. At five of the six sites total volume was unchanged across the range of pine composition. The growth interaction between aspen and pine was found to be a linear relationship of competitive reduction where pine volume, basal area and merchantable volume was highly sensitive to any increase in aspen density or composition.Keywords: Lodgepole pine, aspen, boreal mixedwoods, growth and yield, merchantable volume, basal area, competition. RÉSUMÉSix plantations de pin lodgepole situées dans le sud de la zone biogéoclimatique de l' épinette subboréale (SBS) dans la région nord de l'intérieur de la Colombie-Britannique ont été choisies pour étudier les effets de la compétition par le tremble sur la croissance et le rendement du pin lodgepole. Les six plantations établies dans quatre variantes zonales (dw2, dw3, dk1 et mc2) étaient âgées de 22 à 39 ans. Des travaux de préparation du site ont été réalisés sur tous les sites : scarifiage par traînage et au moyen de disques ou encore par brûlage contrôlé après coupe à blanc. Quatre des six plantations ont fait l' objet d'au moins un traitement de débroussaillage (chimique ou manuel) afin de contrôler le tremble. Dans chaque plantation, 30 pins (CP) ont été choisis comme centres de parcelles-échantillons destinées à étudier l'importance de la compétition par le tremble. Une série de parcelles regroupées jusqu'à un rayon de 7,98 m a été utilisée pour évaluer les effets du pourcentage de la composition en pin sur la densité et le volume du peuplement en se servant de modèles linéaires et non linéaires. Pour cinq des six plantations, le volume total est demeuré inchangé, peu importe la composition en pin. L' effet de l'interaction entre le tremble et le pin sur la croissance se traduit par une relation linéaire où le volume du pin, sa surface terrière et son volume marchand diminuaient significativement avec tout accroissement de la densité ou de la composition en tremble.

show abstract

Climate and site characteristics affect juvenile trembling aspen development in conifer plantations across southern British Columbia

Cited by 2 publications

References 38 publications

Identifying and Characterizing Important Trembling Aspen Competitors with Juvenile Lodgepole Pine in Three South-Central British Columbia Ecosystems

Identifying and Characterizing Important Trembling Aspen Competitors with Juvenile Lodgepole Pine in Three South-Central British Columbia Ecosystems

Lodgepole pine and trembling aspen mixedwoods: Growth and yield within 22 to 39 year old pine plantations of northern interior British Columbia

Contact Info

Product

Resources

About