Predicted and Observed Rates of Spread of Crown Fires in Immature Jack Pine

1986 ◽  
Vol 48 (1-2) ◽  
pp. 65-76 ◽  
Author(s):  
FRANK A. ALBINI ◽  
BRIAN J. STOCKS
Keyword(s):  
Jack Pine ◽  
Crown Fires

Prescribed fire as a tool to regenerate live and dead serotinous jack pine (Pinus banksiana) stands

2017 ◽  
Vol 26 (6) ◽  
pp. 478 ◽  
Author(s):  
Maria Sharpe ◽  
Hyejin Hwang ◽  
David Schroeder ◽  
Soung Ryoul Ryu ◽  
Victor J. Lieffers
Keyword(s):  
Prescribed Fire ◽  
Natural Regeneration ◽  
Pinus Banksiana ◽  
Mountain Pine Beetle ◽  
Jack Pine ◽  
Crown Fire ◽  
Seedling Regeneration ◽  
Dead Trees ◽  
Crown Fires ◽  
Pine Beetle

This study documents cone opening and natural regeneration of jack pine (Pinus banksiana Lamb.) after burning live and dead stands similar to those killed by the mountain pine beetle (Dendroctonus ponderosae). Trees were killed by girdling in May and were burned in late July, 26 months later. Pairs of live and dead plots were simultaneously burned using three types of fire: surface, intermittent crown and continuous crown fires. Each type of fire was replicated three times; the nine pairs of burns were completed in a 4-day period. After fire, more cones were opened on dead trees than live trees. On dead trees, there was cone opening even when fire charred only the lower part of the bole. Three years after burning, dead stands with continuous crown fires had some of the densest regeneration and the highest rates of stocking. Across all burns in this study, seedling regeneration was best in shallow residual duff and in the more intensely burned plots. Without burning, there was virtually no regeneration 5 years after mortality. The results also show that burning, especially under continuous crown fire, could be used to promote regeneration in dead stands.

Jack pine regeneration and crown fires

2004 ◽  
Vol 34 (8) ◽  
pp. 1634-1641 ◽  
Author(s):  
W J de Groot ◽  
P M Bothwell ◽  
S W Taylor ◽  
B M Wotton ◽  
B J Stocks ◽  
...  
Keyword(s):  
Pinus Banksiana ◽  
Germination Rate ◽  
Flame Temperature ◽  
Seed Viability ◽  
Fire Spread ◽  
Jack Pine ◽  
Seed Rain ◽  
Fire Intensity ◽  
Crown Fires ◽  
Pine Regeneration

The effect of crown fires on Pinus banksiana Lamb. regeneration was studied in separate forest- and cone-burning experiments. Nine plots (0.56–2.25 ha) of jack pine trees near Fort Providence, Northwest Territories, were burned using crown fires to determine the effects of fire intensity, rate of fire spread, depth of burn, and postfire duff depth on seed viability and regeneration. Fire intensities were 36 902 – 93 476 kW/m, and fire spread rates were 24–70 m/min. Depths of burn were low (2.0–3.6 cm), and postfire duff depths averaged 2.0–5.5 cm. Postfire seed rain was highly variable (64–634 seeds/m2), but seed viability was near 67% on all plots. Jack pine regeneration was also highly variable (7–79 seedlings/m2). In the cone-burning experiment, the germination rate increased from 41% (unheated cones) to 64% after 10 s of burning but decreased sharply after 30 s. Flame temperature did not significantly affect viability. Cone-burning results suggest that the postfire seed rain originated from the upper canopy, where flame duration was 5–15 s, and seed in the lower canopy was consumed by fire. Seed rain and regeneration were primarily influenced by understory fine fuel consumption (and therefore, fire intensity), tree height, and live crown base height.

Combustion aerosol from experimental crown fires in a boreal forest jack pine stand

2004 ◽  
Vol 34 (8) ◽  
pp. 1627-1633 ◽  
Author(s):  
N J Payne ◽  
B J Stocks ◽  
A Robinson ◽  
M Wasey ◽  
J W Strapp
Keyword(s):  
Boreal Forest ◽  
Forest Fires ◽  
Regional Climate ◽  
Jack Pine ◽  
Climate Modelling ◽  
Cross Sectional ◽  
Prescribed Burns ◽  
Crown Fires ◽  
Median Diameter ◽  
Flaming Combustion

Combustion aerosol particles from boreal forest fires were quantified to facilitate investigation of the potential effects of increased fire activity caused by global warming, by providing data inputs for global and regional climate modelling of the direct and indirect effects. Aerial sampling was carried out in smoke plumes from 1-ha prescribed burns in mature jack pine stands. The three sampled burns resulted in crown fires, with fuel consumption from 4.2 to 5.8 kg·m–2. Accumulation and coarse mode aerosol (>0.1 µm) was quantified using a passive cavity aerosol spectrometer probe and cascade impactor. The number median diameter of particles in the smoke plume was 0.29 µm, and the peak number and cross-sectional area density occurred around a particle size of 0.4 µm. More than 99% of particles sized had diameters <1.2 µm. Aerosol from flaming combustion was coarser than that from the smouldering phase, with number median diameters of 0.3 and 0.2 µm, respectively.

scholarly journals Allometric Equations for Estimating Biomass and Carbon Stocks in Afforested Open Woodlands with Black Spruce and Jack Pine, in the Eastern Canadian Boreal Forest

Forests ◽  
2021 ◽  
Vol 12 (1) ◽  
pp. 59
Author(s):  
Olivier Fradette ◽  
Charles Marty ◽  
Pascal Tremblay ◽  
Daniel Lord ◽  
Jean-François Boucher
Keyword(s):  
Large Scale ◽  
Ad Hoc ◽  
Black Spruce ◽  
Tree Height ◽  
Jack Pine ◽  
Carbon Stocks ◽  
Allometric Equations ◽  
C Stocks ◽  
The Difference ◽  
Canadian Boreal Forest

Allometric equations use easily measurable biometric variables to determine the aboveground and belowground biomasses of trees. Equations produced for estimating the biomass within Canadian forests at a large scale have not yet been validated for eastern Canadian boreal open woodlands (OWs), where trees experience particular environmental conditions. In this study, we harvested 167 trees from seven boreal OWs in Quebec, Canada for biomass and allometric measurements. These data show that Canadian national equations accurately predict the whole aboveground biomass for both black spruce and jack pine trees, but underestimated branches biomass, possibly owing to a particular tree morphology in OWs relative to closed-canopy stands. We therefore developed ad hoc allometric equations based on three power models including diameter at breast height (DBH) alone or in combination with tree height (H) as allometric variables. Our results show that although the inclusion of H in the model yields better fits for most tree compartments in both species, the difference is minor and does not markedly affect biomass C stocks at the stand level. Using these newly developed equations, we found that carbon stocks in afforested OWs varied markedly among sites owing to differences in tree growth and species. Nine years after afforestation, jack pine plantations had accumulated about five times more carbon than black spruce plantations (0.14 vs. 0.80 t C·ha−1), highlighting the much larger potential of jack pine for OW afforestation projects in this environment.

Quantifying the effects of climate change and harvesting on carbon dynamics of boreal aspen and jack pine forests using the TRIPLEX-Management model

2012 ◽  
Vol 281 ◽  
pp. 152-162 ◽  
Author(s):  
Weifeng Wang ◽  
Changhui Peng ◽  
Daniel D. Kneeshaw ◽  
Guy R. Larocque ◽  
Xinzhang Song ◽  
...  
Keyword(s):  
Climate Change ◽  
Carbon Dynamics ◽  
Jack Pine ◽  
Pine Forests ◽  
Management Model ◽  
Jack Pine Forests

scholarly journals Snow ablation modeling at the stand scale in a boreal jack pine forest

1997 ◽  
Vol 102 (D24) ◽  
pp. 29397-29405 ◽  
Author(s):  
J. P. Hardy ◽  
R. E. Davis ◽  
R. Jordan ◽  
X. Li ◽  
C. Woodcock ◽  
...  
Keyword(s):  
Jack Pine ◽  
Pine Forest ◽  
Ablation Modeling

The optimal rotation of a flammable forest stand

1980 ◽  
Vol 10 (1) ◽  
pp. 30-34 ◽  
Author(s):  
D. L. Martell
Keyword(s):  
Stochastic Model ◽  
Fire Management ◽  
Jack Pine ◽  
Forest Stand ◽  
Timber Production ◽  
Forest Stands ◽  
Rotation Interval ◽  
Optimal Rotation

The author describes a stochastic model of forest stand rotation which can be used to determine the optimal planned rotation interval for flammable forest stands. The model can also be used to estimate the value of fire management activities in terms of the potential enhanced value of timber production. The use of the model is illustrated by applying it to a simplified case of jack pine (Pinusbanksiana, Lamb.) management.

WALLROTHIELLA ARCEUTHOBII, A PARASITE OF THE JACK-PINE MISTLETOE

1931 ◽  
Vol 5 (2) ◽  
pp. 219-230 ◽  
Author(s):  
E. Silver Dowding
Keyword(s):  
British Columbia ◽  
Germ Tube ◽  
Jack Pine ◽  
Maximum Development ◽  
Lower Compartment

Arceuthobium, the host of Wallrothiella Arceuthobii, has been found in British Columbia, Alberta, Manitoba, and Ontario and Wallrothiella Arceuthobii has been found in Manitoba and Alberta.Arceuthobium fruits become infected in Canada in the spring, about a week after fertilization. The fungus and the infected fruits then increase in size, and they attain their maximum development by the summer of the following year.The ascospores are not violently discharged into the air. The spores ooze out into water when the perithecia are wet.The mature perithecium is made up of two compartments, the lower compartment containing the asci, and the upper compartment into which the ascospores are discharged and where they collect.It is suggested that insects are agents which disperse the ascospores.Ascospores sown in Arceuthobium decoction commence to germinate, but growth ceases after the germ tube has reached the length of about one millimetre.Attempts to inoculate the stigmas of healthy Arceuthobium with "sprout-mycelium" have so far been unsuccessful.

scholarly journals Carbon fluxes in a young, naturally regenerating jack pine ecosystem

2006 ◽  
Vol 111 (D1) ◽  
Author(s):  
Eugénie S. Euskirchen ◽  
Kurt S. Pregitzer ◽  
Jiquan Chen
Keyword(s):  
Carbon Fluxes ◽  
Jack Pine
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