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2. Effects of variable canopy retention harvest on epixylic bryophytes in boreal black spruce – feathermoss forests1This article is one of a selection of papers from the International Symposium on Dynamics and Ecological Services of Deadwood in Forest Ecosystems
- Author
-
BergeronYves, ArseneaultJulie, and J FentonNicole
- Subjects
Canopy ,Global and Planetary Change ,Ecology ,Boreal ,Forest ecology ,Environmental science ,Forestry ,Black spruce ,Ecosystem services - Abstract
Modification of forest attributes and structural components like downed wood (DW) during forest harvest can lead to local species loss. Epixylic bryophytes have been proposed as good indicators of such changes. Unharvested control, variable canopy retention, and single pass harvest represent a gradient in forest harvest impact and can be used to test the response of epixylic bryophytes to different levels of environmental change. The objective of this study was to see if variable canopy retention attenuates environmental change associated with harvesting, consequently maintaining an epixylic community more similar to unharvested stands than single pass harvesting. Environmental conditions and DW characteristics were sampled on 225 DW pieces distributed in 45 permanent plots. Results showed that treatment affected epixylic richness through its impact on canopy openness and DW diameter and decomposition class. Fewer species were found in more open habitats and more species were found on bigger and more decomposed DW. Most epixylic species were more commonly found on the forest floor than on the DW. In conclusion, variable canopy retention harvest offered microclimatic conditions and DW availability and quality more suitable for epixylic species than single pass harvest, which was less suitable for epixylic species.
- Published
- 2012
3. Effect of chronic ammonium nitrate addition on the ectomycorrhizal community in a black spruce stand1This article is one of a selection of papers from the 7th International Conference on Disturbance Dynamics in Boreal Forests
- Author
-
MorinHubert, BordeleauAdam, RossiSergio, and HouleDaniel
- Subjects
Global and Planetary Change ,Ecology ,Host (biology) ,Ammonium nitrate ,Niche ,Taiga ,Forestry ,Biology ,Vitality ,Black spruce ,chemistry.chemical_compound ,chemistry ,Disturbance (ecology) ,Botany ,Colonization - Abstract
Observed modifications of ectomycorrhizal (ECM) communities have been connected to the increased N depositions of the 20th century. Because of their narrow niche width, small disturbances of soil conditions can produce greater effects on the fungal species than on their host trees. This study investigated the ECM community in a black spruce ( Picea mariana (Mill.) BSP) stand subjected to long-term additions of 9 and 30 kg N·ha–1·year–1 of ammonium nitrate, representing 3 and 10 times the atmospheric N deposition at the site, respectively. Root tip vitality and ECM presence were detected on samples collected from the organic horizon and ECM were classified into morphotypes according to their morphological and anatomical characters. In the control, 80.6% of the root tips were vital, 76.5% of them showing ECM colonization. Higher root tip vitality and mycorrhization were observed in the treated plots. Forty-one morphotypes were identified, most of them detected at the higher N inputs. Results diverging from the expectations of a reduction in ECM presence and diversity could be related to a higher growth rate of the trees following fertilization. The repeated application of small N doses could have been a better imitation of natural inputs from atmospheric deposition and could have provided more reliable responses of ECM to treatment.
- Published
- 2012
4. Xylogenesis in black spruce subjected to rain exclusion in the field1This article is one of a selection of papers from the 7th International Conference on Disturbance Dynamics in Boreal Forests
- Author
-
BelienEvelyn, RossiSergio, MorinHubert, and DeslauriersAnnie
- Subjects
Global and Planetary Change ,Disturbance (geology) ,Ecology ,fungi ,Taiga ,Global warming ,food and beverages ,Environmental science ,Forestry ,Black spruce ,Selection (genetic algorithm) - Abstract
The predicted climate warming and more frequent and longer droughts are expected to produce potentially severe water stresses in the boreal forest. The aim of this experiment was to study the effect of a summer drought on xylem phenology and anatomy of mature black spruce ( Picea mariana (Mill.) BSP) trees in their natural environment. The trees were excluded from rain during June–September 2010 by the installation of under-canopy roofs in four sites of the boreal forest of Quebec. Xylem phenology, stem radius variations, and physiological traits of treated and control trees were monitored at short time resolution. At the end of the growth season, cell characteristics were measured. The rain exclusion reduced the cell area of the xylem, but no significant change was observed in cell wall thickness, cell production, or phenology. Stem radius variations of the treated trees were lower but followed the same pattern as the control. After removal of the exclusion, trees and soil quickly recovered their normal water status. One summer of drought led to the formation of smaller tracheids but showed that black spruce is resistant to this rain exclusion treatment. This is likely due to the ability to collect water from sources other than the superficial soil horizon.
- Published
- 2012
5. Timing of growth reductions in black spruce stem and branches during the 1970s spruce budworm outbreak1This article is one of a selection of papers from the 7th International Conference on Disturbance Dynamics in Boreal Forests
- Author
-
KrauseCornelia, PlourdePierre-Y., LuszczynskiBoris, MorinHubert, and RossiSergio
- Subjects
Choristoneura fumiferana ,Global and Planetary Change ,Radial growth ,Ecology ,biology ,Disturbance (ecology) ,Agronomy ,Taiga ,Botany ,Forestry ,biology.organism_classification ,Black spruce ,Spruce budworm - Abstract
Spruce budworm ( Choristoneura fumiferana (Clemens)) defoliation is known to regularly produce radial growth decrease in black spruce ( Picea mariana (Mill.) Britton, Sterns & Poggenb.) in the boreal forest of Quebec. Some studies have already shown that the first year of defoliation does not induce growth losses in the stem but could occur in other tree parts. We therefore examined the timing and duration of the growth reduction caused by the last outbreak in black spruce by also considering the branches. More than 79% of branches and 65% of stems exhibited a >40% growth decrease.The reduction was first registered in the upper part of the stem before being detected lower in the stem in 87% of the trees. Probabilities of growth reduction in the upper part of the stem were highest in 1976 and 1977. In the lower stem, the probabilities were highest in 1978. An interesting finding was that in 69% of the studied stands, the probability of growth reduction started earlier (1–2 years) in the branches than in the stem at 1.3 m. Branch analysis should be considered whenever questions arise in regard to the evolution of spruce budworm defoliation as well as the timing of observed growth reduction in black spruce.
- Published
- 2012
6. Residual-tree growth responses to partial stand harvest in the black spruce (Picea mariana) boreal forestThis article is one of a selection of papers published in the Special Forum IUFRO 1.05 Uneven-Aged Silvicultural Research Group Conference on Natural Disturbance-Based Silviculture: Managing for Complexity
- Author
-
John P. Caspersen, Sean C. Thomas, and H. C. Thorpe
- Subjects
Global and Planetary Change ,Ecology ,Agroforestry ,Taiga ,Forestry ,Residual ,Black spruce ,Natural (archaeology) ,Geography ,Boreal ,Disturbance (ecology) ,Ecosystem management ,Silviculture - Abstract
Variants of partial harvesting are gaining favour as means to balance ecosystem management and timber production objectives on managed boreal forest landscapes. Understanding how residual trees respond to these alternative silvicultural treatments is a critical step towards evaluating their potential from either a conservation or a wood supply perspective. We used dendroecological techniques combined with a chronosequence approach to quantify the temporal radial growth response pattern of residual black spruce ( Picea mariana (Mill.) BSP) trees to partial harvest in northeastern Ontario. At its peak, 8–9 years after harvest, radial growth of residual trees had doubled. The growth pattern was characterized by a 2-year phase of no response, a subsequent period of increase 3–9 years after harvest, and a stage of declining rates 10–12 years after harvest. The magnitude of tree growth response depended strongly on tree age: peak postharvest growth was substantially higher for young trees, while old trees displayed only modest growth increases. Both the large magnitude and the time delay in postharvest growth responses have important implications for the development of more accurate quantitative tools to project future yields and, more generally, for determining whether partial harvesting is a viable management option for the boreal forest.
- Published
- 2007
7. Trends in growing space efficiency of four boreal forest species based on yield table data.
- Author
-
Smith, Victor G.
- Subjects
- *
JACK pine , *PAPER birch , *TAIGAS , *ACCELERATION (Mechanics) , *BLACK spruce , *AGING - Abstract
Yield tables are used to identify trends in growing space efficiency (GSE) and to relate GSE to self-tolerance and intraspecific competition. The method is useful when data specifically collected for this purpose are not available. Plonski's normal yield tables for jack pine (Pinus banksiana Lamb.), paper birch (Betula papyrifera Marshall), trembling aspen (Populus tremuloides Michx.), and black spruce (Picea mariana (Mill.) B.S.P.) are used. An exponential volume-age function was partitioned into volume-area and area-age functions. The exponents of these two components form the B/D ratio, which is used to determine the mode of the stand at a given time, e.g., if B/D is <3/2, then the stand is in area occupation mode, and if B/D is >3/2, then the stand is in area exploitation mode. The dominant mode is the one most responsive to availability of growth resources, showing greater acceleration when resources are plentiful and more rapid deceleration when resources are scarce. Jack pine and paper birch are identified as area occupiers, whereas trembling aspen and black spruce are area exploiters and are therfore self-tolerant. Asymmetric competition was deemed to be present for paper birch throughout the life of the stand on site class I and for trembling aspen on all sites prior to senescence. Les tables de production sont utilisées pour identifier les tendances de l'efficacité à utiliser l'espace de croissance (EEC) et pour relier l'EEC à l'auto-tolérance et à la compétition intraspécifique. La méthode est utile lorsque des données spécifiquement récoltées à cette fin ne sont pas disponibles. Les tables normales de production de Plonski pour le pin gris (Pinus banksiana Lamb.), le bouleau à papier (Betula papyrifera Marshall), le peuplier faux-tremble (Populus tremuloides Michx.) et l'épinette noire (Picea mariana (Mill.) B.S.P.) ont été utilisées. Une fonction exponentielle reliant le volume à l'âge a été séparée en fonctions reliant le volume à la surface et la surface à l'âge. Les exposants de ces deux composantes forment le rapport entre B et D qui est utilisé pour déterminer le mode du peuplement à un temps donné; p. ex. si B/D est plus petit que 3/2, le peuplement est dans un mode d'occupation de la surface et, si B/D est plus grand que 3/2, le peuplement est dans un mode d'exploitation de la surface. Le mode dominant est celui qui réagit le plus à la disponibilité des ressources qui supportent la croissance; il est associé à une plus forte accélération quand les ressources sont abondantes et à une plus forte décélération lorsque les ressources sont rares. Le pin gris et le bouleau à papier sont identifiés comme des occupants de la surface alors que le peuplier faux-tremble et l'épinette noire sont des exploitants et sont, par conséquent, auto-tolérants. Nous avons jugé qu'une compétition asymétrique était présente dans le cas du bouleau à papier tout au long de la vie d'un peuplement établi sur une station de qualité I et, dans le cas du peuplier, sur toutes les stations avant la période de sénescence. [ABSTRACT FROM AUTHOR]
- Published
- 2010
- Full Text
- View/download PDF
8. Reconstitution historique du paysage préindustriel de la région écologique des hautes collines du Bas-Saint-Maurice.
- Author
-
Barrette, Martin and Bélanger, Louis
- Subjects
ECOSYSTEM management ,INDUSTRIAL surveys ,PAPER industry ,BALSAM fir ,BLACK spruce ,FOREST conservation ,SCIENTIFIC method - Abstract
Copyright of Canadian Journal of Forest Research is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2007
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9. Modelling diameter at breast height distribution of jack pine and black spruce natural stands in eastern Canada.
- Author
-
Rijal, Baburam and Sharma, Mahadev
- Subjects
JACK pine ,BLACK spruce ,AUSTRIAN pine ,WEIBULL distribution ,DISTRIBUTION (Probability theory) ,DEAD trees - Abstract
Individual tree diameter at breast height (DBH) distribution is an important information for forest management planning. Forest managers obtain the DBH data either by field measurements or estimations using predictive models. However, probability distribution models are still lacking or need improvement. Therefore, we aimed to construct and fit diameter distribution models that reflect forest structure and composition change. We evaluated gamma, log-normal, and Weibull probability distribution functions (PDFs) for two commercially important tree species, black spruce (Picea mariana (Mill) B.S.P.) and jack pine (Pinus banksiana Lamb), grown in natural stands across Ontario, Canada. We modelled the parameters of the distributions as a function of stand-level variables for these species. We used DBH data from 735 permanent sample plots. Our results showed that all three evaluated PDFs reflected observed DBH distribution. We demonstrated that the moment-based recovered parameters could represent the maximum likelihood-estimated parameters precisely, and parameters of the PDFs can be modelled as a function of stand-level dynamic covariates. The models unbiasedly predicted the PDF parameters DBH means and DBH classes. The R
2 of the model fit ranged between 0.35 and 0.98 for the predicted parameters and 0.90 and 0.97 for the predicted DBH. [ABSTRACT FROM AUTHOR]- Published
- 2024
- Full Text
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10. New aboveground biomass equations by components for small black spruce in peatland ecosystems of Western Canada.
- Author
-
Wagers, Steven, Castilla, Guillermo, Voicu, Mihai, Rea, Tyler, and Sanchez-Azofeifa, G. Arturo
- Abstract
Black spruce is the most common tree species in Canada, dominating treed peatlands where they are usually stunted. We used 495 destructively sampled trees from 56 plots to develop allometric models of aboveground biomass by components (stem, branches, and needles) for small (<5 m tall) black spruce from peatlands in the Taiga Plains and Boreal Plains Ecozones of Western Canada, for which there were no specific models available of biomass by components. We used leave-one-plot-out cross-validation to assess transferability and compare our models with existing national and ecozone-specific equations. Our models predicted total tree biomass with better accuracy and less biased estimates than the national model (relative RMSE: 30% versus 35% national; relative bias: +1% versus –12% national). Similar results were obtained in other external datasets. Existing ecozone equations performed worse than either our models or the national ones. When we applied the models at the plot level to predict aboveground biomass density (Mg·ha
−1 ), our models outperformed the national model again (relative RMSE: 15.9% versus 18.6% national, relative bias: +3.5% versus –13.6% national). These results indicate that at least for peatlands of Western Canada, our models provide better aboveground biomass estimates for small black spruce trees than existing models. [ABSTRACT FROM AUTHOR]- Published
- 2024
- Full Text
- View/download PDF
11. Application of shadow fraction models for estimating attributes of northern boreal forests.
- Subjects
TAIGAS ,FOREST mapping ,BLACK spruce ,PLANT biomass ,STANDARD deviations ,CONIFERS - Abstract
Copyright of Canadian Journal of Forest Research is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2012
- Full Text
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12. Differences in crown characteristics between black ( Picea mariana) and white spruce ( Picea glauca).
- Subjects
BLACK spruce ,WHITE spruce ,CROWNS (Botany) ,PHYLOGENY ,PLANT species ,TAIGAS - Abstract
Copyright of Canadian Journal of Forest Research is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2012
- Full Text
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13. Tree-ring evidence of larch sawfly outbreaks in western Labrador, Canada.
- Author
-
Nishimura, Peter H. and Laroque, Colin P.
- Subjects
TREE-rings ,LARCH sawfly ,BLACK spruce ,DEFOLIATION ,DENDROCHRONOLOGY ,INSECT-plant relationships ,INSECTS ,FORESTS & forestry ,NINETEENTH century ,HISTORY - Abstract
Copyright of Canadian Journal of Forest Research is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2010
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14. Stand structure and dynamics of Picea mariana on the northern border of the natural closed boreal forest in Quebec, Canada.
- Author
-
Rossi, Sergio, Tremblay, Marie-Josée, Morin, Hubert, and Levasseur, Valérie
- Subjects
BLACK spruce ,TAIGAS ,FORESTS & forestry ,FOREST density ,TREE age ,TREE development ,AIR layering ,PLANT propagation - Abstract
Copyright of Canadian Journal of Forest Research is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2009
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15. Long-term effects of herbivory on tree growth are not consistent with browsing preferences.
- Author
-
Zonnevylle, Hannah M., Acharya, Kirk, Potvin, Lynette, Romanski, Mark, and Ibáñez, Inés
- Subjects
TREE growth ,WHITE spruce ,MOOSE ,BALSAM fir ,BLACK spruce - Abstract
Herbivores affect plants via direct consumption, but also indirectly via changes in the vegetation. These indirect effects may only manifest after decades of exposure and, as a result, their impact is rarely accounted for. To better understand the direct and indirect impacts of a large herbivore, moose (Alces alces), on forests, we measured tree growth in areas that were both subjected to and excluded from herbivory for over 80 years. Growth data were gathered from five tree species, ranging from low to high palatability. We found that at small sizes, Betula papyrifera, a preferred species, benefited from herbivore exclusion. However, larger individuals grew more when exposed to herbivory, a response we attribute to lower competition in heavily browsed conditions. Populus tremuloides, a highly preferred tree, did not show any differences between levels of herbivory. Abies balsamea, a preferred winter browsed, was only marginally affected by browsing at smaller sizes. The two non-preferred species, Picea glauca and Picea mariana, did not show differential growth between herbivory levels. We conclude that herbivores can impact forests through both direct and indirect effects, that these effects are size specific, and that effects vary among species in ways not always predicted by consumption patterns. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
16. Factors influencing black spruce reproductive potential in the northern boreal forest of Quebec.
- Author
-
Splawinski, Tadeusz B., Boucher, Yan, Bouchard, Mathieu, Greene, David F., Gauthier, Sylvie, Auger, Isabelle, Sirois, Luc, Valeria, Osvaldo, and Bergeron, Yves
- Subjects
BLACK spruce ,TAIGAS ,SEED viability ,GROWING season ,FOREST fire ecology ,SEED industry - Abstract
Copyright of Canadian Journal of Forest Research is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2022
- Full Text
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17. Root adaptations of black spruce growing in water-saturated soil.
- Author
-
Krause, Cornelia and Lemay, Audrey
- Subjects
BLACK spruce ,WATERLOGGING (Soils) ,PHYSIOLOGICAL stress ,GROUNDWATER ,WATER levels - Abstract
Copyright of Canadian Journal of Forest Research is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2022
- Full Text
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18. Predictions of wood density and module of elasticity of balsam fir (Abies balsamea) and black spruce (Picea mariana) from near infrared spectral analyses.
- Author
-
Qinghua Xu, Menghua Qin, Yonghao Ni, Defo, Maurice, Dalpke, Barbara, and Sherson, Gail
- Subjects
BALSAM fir ,BLACK spruce ,WOOD density ,ELASTICITY ,NEAR infrared spectroscopy ,MICROFIBRILS - Abstract
The predictions of properties for wood disc average are seldom reported, and they are important for sorting out logs based on their quality. The minimum near infrared (NIR) spectra required to predict wood disc average properties would also be of critical importance. In this study, calibration and prediction models for wood disc average properties were developed using NIR spectral data for balsam fir (Abies balsamea (L.) Mill.) and black spruce (Picea mariana (Mill.) B.S.P.) samples collected from 14 different sites across Newfoundland, Canada. The calibration was done against area-weighted average wood properties determined by SilviScan. NIR spectra were collected in 18 mm increments from the radial-longitudinal face of green and oven-dried samples. Results showed that using NIR spectra from three spots per wood strip was sufficient for the modeling and prediction for density and module of elasticity (MOE). The coefficients of determination ranged from 0.76 (MOE of green wood samples) to 0.88 (density of oven-dried wood samples). However, the microfibril angle (MFA) cannot be well predicted from either green wood or oven-dried wood NIR spectra. Our results further showed that the NIR spectra collected from oven-dried wood samples gave better calibration and prediction than those collected from green wood samples. Les prédictions des propriétés moyennes des disques de bois sont rarement présentées, bien qu'elles soient importantes pour trier les billes en fonction de leur qualité. Les spectres minimum dans le proche infrarouge (PIR) qui sont nécessaires pour prédire les propriétés moyennes des disques de bois ont aussi une importance cruciale. Dans cette étude, des modèles de prédiction et de calibration des propriétés moyennes des disques de bois ont été développés à partir de données spectrales PIR d'échantillons de sapin baumier (Abies balsamea (L.) Mill.) et d'épinette noire (Picea mariana (Mill.) B.S.P.) prélevés dans 14 sites différents couvrant l'ensemble de la province de Terre-Neuve, au Canada. La calibration a été effectuée à partir des propriétés moyennes du bois déterminées à l'aide de SilviScan et pondérées par la superficie. Les spectres PIR ont été obtenus à tous les 18 mm le long de la face longitudinale-radiale d'échantillons verts et anhydres. Les résultats ont démontré que l'utilisation des spectres PIR provenant de trois points par barrette de bois était suffisante pour modéliser et prédire la densité et le module d'élasticité (MOE). Les coefficients de détermination variaient de 0,76 (MOE d'échantillons de bois à l'état vert) à 0,88 (densité d'échantillons de bois à l'état anhydre). Cependant, les spectres PIR du bois vert ou anhydre ne sont pas adéquats pour prédire l'angle des microfibrilles (AMF). Nos résultats ont de plus montré que les spectres PIR des échantillons de bois à l'état anhydre permettent d'obtenir une meilleure calibration et de faire de meilleures prédictions que ceux des échantillons de bois à l'état vert. [ABSTRACT FROM AUTHOR]
- Published
- 2011
- Full Text
- View/download PDF
19. Soil and root respiration in mature Alaskan black spruce forests that vary in soil organic matter decomposition rates.
- Author
-
Vogel, Jason G., Valentine, David W., and Ruess, Roger W.
- Subjects
RESPIRATION in plants ,BLACK spruce ,TREES ,FORESTS & forestry ,ORGANIC compounds ,SOILS - Abstract
Copyright of Canadian Journal of Forest Research is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2005
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20. Long-term recovery of soil carbon stocks and permafrost depth lags recovery of organic layer thickness following fire in black spruce forests of the Copper River Basin, Alaska.
- Author
-
Sousa, Michael J., Jelinski, Nicolas A., Windmuller-Campione, Marcella A., Williams, Andrea K., GreyBear, Edward, Finnesand, Katie, and Zachman, Vanessa
- Subjects
BLACK spruce ,WATERSHEDS ,CARBON in soils ,PERMAFROST ,RIVER sediments ,TUNDRAS - Abstract
Copyright of Canadian Journal of Forest Research is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2021
- Full Text
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21. A flexible approach for predicting and mapping postfire wood borer attacks in black spruce and jack pine forests using the differenced normalized burn ratio (dNBR).
- Author
-
Boucher, Jonathan, Hébert, Christian, and Bauce, Eric
- Subjects
WOOD borers ,JACK pine ,BLACK spruce ,SALVAGE logging - Abstract
Copyright of Canadian Journal of Forest Research is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2020
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22. Modeling black spruce wood fiber attributes with terrestrial laser scanning.
- Author
-
Giroud, Guillaume, Schneider, Robert, Fournier, Richard A., Luther, Joan E., and Martin-Ducup, Olivier
- Subjects
BLACK spruce ,WOOD fiber reinforcement of polymeric composites ,OPTICAL scanners ,FOREST management ,FORESTS & forestry - Abstract
Copyright of Canadian Journal of Forest Research is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2019
- Full Text
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23. Trends in growing space efficiency of four boreal forest species based on yield table data
- Author
-
Victor G. Smith
- Subjects
Global and Planetary Change ,Jack pine ,Ecology ,Yield (wine) ,Taiga ,Mode (statistics) ,Forestry ,Table (information) ,Black spruce ,Intraspecific competition ,Mathematics ,Woody plant - Abstract
Yield tables are used to identify trends in growing space efficiency (GSE) and to relate GSE to self-tolerance and intraspecific competition. The method is useful when data specifically collected for this purpose are not available. Plonski’s normal yield tables for jack pine (Pinus banksiana Lamb.), paper birch (Betula papyrifera Marshall), trembling aspen (Populus tremuloides Michx.), and black spruce (Picea mariana (Mill.) B.S.P.) are used. An exponential volume–age function was partitioned into volume–area and area–age functions. The exponents of these two components form the B/D ratio, which is used to determine the mode of the stand at a given time, e.g., if B/D is 3/2, then the stand is in area exploitation mode. The dominant mode is the one most responsive to availability of growth resources, showing greater acceleration when resources are plentiful and more rapid deceleration when resources are scarce. Jack pine and paper birch are identified as area occupiers, whereas trembling aspen and black spruce are area exploiters and are therfore self-tolerant. Asymmetric competition was deemed to be present for paper birch throughout the life of the stand on site class I and for trembling aspen on all sites prior to senescence.
- Published
- 2010
24. Position of cones within cone clusters determines seed survival in black spruce during wildfire.
- Author
-
Splawinski, T.B., Gauthier, S., Bergeron, Y., Greene, D.F., Michaletz, S.T., and Houle, D.
- Subjects
BLACK spruce ,FIRE ,SEED viability ,CLUSTERING of particles ,ABSCISSION (Botany) - Abstract
Copyright of Canadian Journal of Forest Research is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2019
- Full Text
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25. Carbon balance of the taiga forest within Alaska: present and future
- Author
-
John Yarie and Sharon A. Billings
- Subjects
Global and Planetary Change ,Biomass (ecology) ,Ecology ,biology ,Soil organic matter ,Taiga ,Forestry ,Plant community ,biology.organism_classification ,Black spruce ,Environmental science ,Ecosystem ,Quaking Aspen ,Populus balsamifera - Abstract
Forest biomass, rates of production, and carbon dynamics are a function of climate, plant species present, and the structure of the soil organic and mineral layers. Inventory data from the U.S. Forest Service (USFS) Inventory Analysis Unit was used to develop estimates of the land area represented by the major overstory species at various age-classes. The CENTURY model was then used to develop an estimate of carbon dynamics throughout the age sequence of forest development for the major ecosystem types. The estimated boreal forest area in Alaska, based on USFS inventory data is 17 244 098 ha. The total aboveground biomass within the Alaska boreal forest was estimated to be 815 330 000 Mg. The CENTURY model estimated maximum net ecosystem production (NEP) at 137, 88, 152, 99, and 65 g·m2·year1 for quaking aspen (Populus tremuloides Michx.), paper birch (Betula papyrifera Marsh.), balsam poplar (Populus balsamifera L.), white spruce (Picea glauca (Moench) Voss), and black spruce (Picea mariana (Mill.) BSP) forest stands, respectively. These values were predicted at stand ages of 80, 60, 41, 68, and 100 years, respectively. The minimum values of NEP for aspen, paper birch, balsam poplar, white spruce, and black spruce were 171, 166, 240, 300, and 61 g·m2·year1 at the ages of 1, 1, 1, 1, and 12, respectively. NEP became positive at the ages of 14, 19, 16, 13, and 34 for aspen, birch, balsam poplar, white spruce, and black spruce ecosystems, respectively. A 5°C increase in mean annual temperature resulted in a higher amount of predicted production and decomposition in all ecosystems, resulting in an increase of NEP. We estimate that the current vegetation absorbs approximately 9.65 Tg of carbon per year within the boreal forest of the state. If there is a 5°C increase in the mean annual temperature with no change in precipitation we estimated that NEP for the boreal forest in Alaska would increase to 16.95 Tg of carbon per year.
- Published
- 2002
26. The impact of a black spruce ( Picea mariana) plantation on carbon exchange in a cutover peatland in Western Canada.
- Author
-
Bravo, Tania Garcia, Strack, Maria, and Rochefort, Line
- Subjects
BLACK spruce ,ATMOSPHERIC carbon dioxide & the environment ,TREE farms ,PEATLAND restoration ,CUTOVER lands - Abstract
Copyright of Canadian Journal of Forest Research is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2018
- Full Text
- View/download PDF
27. Black spruce somatic embryo germination and desiccation tolerance. II. Effect of an abscisic acid treatment on protein synthesis
- Author
-
Tannis Beardmore and Pierre J. Charest
- Subjects
Global and Planetary Change ,Ecology ,Somatic embryogenesis ,organic chemicals ,fungi ,food and beverages ,Forestry ,social sciences ,Biology ,Black spruce ,Desiccation tolerance ,Horticulture ,chemistry.chemical_compound ,chemistry ,Germination ,Plant protein ,Botany ,Shoot ,population characteristics ,Desiccation ,Abscisic acid - Abstract
In this paper, the biochemical changes associated with a 20 μM abscisic acid (ABA) and desiccation treatment on mature black spruce somatic embryos (SEs) were examined. It was previously shown that this ABA treatment of black spruce SEs resulted in an earlier, more uniform germination (i.e., root and shoot growth synchrony) and increased SE tolerance to slow and fast desiccation. In this paper, mature SEs (control SEs) were either placed on maturation media containing 20 μM ABA for 7 days (ABA-treated SEs) or placed on maturation media for 7 days without ABA (control–ABA SEs). Only the ABA treatment resulted in an increased SE protein content, dry mass, and SE ABA content compared with the control SEs. The ABA treatment was the only treatment that maintained a high percent germination following slow desiccation. Seven proteins with molecular mass of 42-, 33-, 32-, 28-, 27-, 21-, and 20-kDa were identified as storage proteins. An examination of in vivo protein synthesis showed that storage protein synthesis occurred in control SEs, ABA-treated SEs, and control –ABA SEs. There were minor changes, such as a cessation or decline in storage protein synthesis, in the ABA-treated and control –ABA SEs. Protein isolated from the treated and control SEs was probed with an antibody raised to the maize dehydrin. This antibody reacted strongly to a 23-kDa protein and reacted slightly to three other proteins in mature zygotic and somatic embryos and in all treated SEs. The ABA-treated SEs appeared to have a slightly elevated quantity of the 23-kDa dehydrin-like protein (based on intensity of the band in the Western blot). Desiccation of these SEs resulted in a decline in this protein to a level similar to that found in the controls. The ABA treatment induced the synthesis of two low molecular mass proteins (12- and 8-kDa) and their synthesis continued after these somatic embryos were desiccated. The synthesis of the 8-kDa protein was induced when control SEs were desiccated. These results suggest that the ABA treatment extended the maturation stage of development of the black spruce SEs and resulted in an increase in a dehydrin-like protein.
- Published
- 1995
28. Natural root grafting in Picea mariana to cope with spruce budworm outbreaks.
- Author
-
Salomón, Roberto L., Tarroux, Emilie, and DesRochers, Annie
- Subjects
BLACK spruce ,SPRUCE ,SPRUCE budworm ,CHORISTONEURA ,CARBON - Abstract
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- Published
- 2016
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29. Prescribed burning of harvested boreal black spruce forests in eastern Canada: effect on understory vegetation.
- Author
-
Faivre, Nicolas, Boudreault, Catherine, Renard, Sébastien, Fenton, Nicole J., Gauthier, Sylvie, and Bergeron, Yves
- Subjects
BLACK spruce ,FOREST ecology ,UNDERSTORY plants ,FOREST fire ecology ,FOREST productivity - Abstract
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- Published
- 2016
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30. Previous growing season climate controls the occurrence of black spruce growth anomalies in boreal forests of Eastern Canada.
- Author
-
Ols, Clémentine, Hofgaard, Annika, Bergeron, Yves, and Drobyshev, Igor
- Subjects
GROWING season ,ENVIRONMENTAL engineering ,BLACK spruce ,TAIGAS ,ECOLOGICAL resilience ,CLIMATE change ,FOREST productivity - Abstract
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- Published
- 2016
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31. An economic analysis of seed source options under a changing climate for black spruce and white pine in Ontario, Canada.
- Author
-
McKenney, Daniel W., Pedlar, John H., Yang, Jing, Weersink, Alfons, and Lawrence, Glenn
- Subjects
FORESTS & forestry ,SEEDS ,CLIMATE change ,BLACK spruce ,WHITE pine - Abstract
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- Published
- 2015
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32. Fuel load, structure, and potential fire behaviour in black spruce bogs.
- Author
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Johnston, D.C., Turetsky, M.R., Benscoter, B.W., and Wotton, B.M.
- Subjects
BLACK spruce ,FORESTRY & climate ,WILDFIRES & the environment ,FOREST canopies ,BURNING of fuelwood ,PEATLAND forestry - Abstract
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- Published
- 2015
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33. Hierarchical analysis of black spruce and balsam fir wood density in Newfoundland.
- Author
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Groot, Arthur and Luther, Joan E.
- Subjects
WOOD density ,BLACK spruce ,BALSAM fir ,WOOD quality ,TREE growth ,MULTILEVEL models - Abstract
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- Published
- 2015
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34. Comment on 'Aging discrepancies of white spruce affect the interpretation of static age structure in boreal mixedwoods'
- Author
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Victor J. Lieffers and Kenneth J. Stadt
- Subjects
Stand development ,Global and Planetary Change ,Ecology ,biology ,Age structure ,Taiga ,Forestry ,biology.organism_classification ,Black spruce ,Ground level ,Geography ,Boreal ,Narrow range ,Abies balsamea - Abstract
There have been a recent series of papers that have documented underestimation of the age of boreal forest conifers. DesRochers and Gagnon (1997) demonstrated that excavation, serial sectioning to locate the root collar, and detailed dendrochronological analysis of aboveand below-ground sections (cross-dating) of the lower stem of black spruce (Picea mariana (Mill.) BSP) is necessary for exact age estimates. This has been further demonstrated on balsam fir (Abies balsamea (L.) Mill.) by Parent et al. (2000, 2002) and Parent and Morin (2002), and for a variety of boreal mixedwood species by Gutsell and Johnson (2002). Peters et al. (2002) have demonstrated the same difficulties in aging white spruce (Picea glauca (Moench) Voss). We have two objectives in writing this comment on the Peters et al. (2002) paper: (1) To clarify and discuss the issue of the timing of white spruce recruitment in boreal forests. We are concerned that Peters et al. (2002) will lead readers to believe that recruitment of white spruce in boreal mixedwood forests occurs only for a short period immediately after disturbance. (2) We also wish to discuss the place of very accurate but expensive techniques versus less accurate and inexpensive techniques in stand dynamics research. Peters et al. (2002) report the age structure and aging error for white spruce from nine 7-year-old and three older boreal mixedwood stands. They found a 2.4-year mean underestimate of time of establishment in a 20-year-old stand and a 6.4-year underestimate in two 38-year-old stands if tree sections were cut at ground level and rings counted, compared with ages determined by excavation to the root collar and careful cross-dating. Their conclusions were that “previous assumptions that age of white spruce can be accurately determined by ring counts at ground level (Youngblood 1995; Lieffers et al. 1996; Galipeau et al. 1997) are not valid in mixedwood stands in Alberta”, and “the mean number of missing rings found for trees in 38-year-old stands (6.4) nearly accounts for the regeneration lags and extended regeneration duration typically observed in non-cross-dated older stands (Youngblood 1995; Lieffers et al. 1996)”, and “aging errors have led to inaccurate depiction of regeneration patterns during early mixedwood stand development”. We are concerned that readers of Peters et al. (2002) will conclude that recruitment of spruce occurs almost exclusively in a short period after disturbance and that previous studies indicating that recruitment is sometimes delayed or extended were in error. From our reading of these three older papers cited in Peters et al. (2002), we believe that the authors would still have come to the same conclusions that they state in their papers even if they had aged their stands by excavation and cross-dating (assuming similar errors in aging). These papers’ general conclusions were that white spruce recruitment often begins immediately or shortly after disturbance, but in some stands or conditions the recruitment is delayed or extended over a long time period. The data from 46to 86-year-old Alberta stands in Lieffers et al. (1996) show two of nine stands with at least a 20-year delay before spruce recruitment began, and all sites with continuing spruce recruitment for 15–65 years. Youngblood (1995) found white spruce recruitment periods extending for more than 100 years based on ground-level age, although he did not sample all the spruce in his stands. Galipeau et al. (1997) found an initial 20-year white spruce recruitment pulse was followed by a second pulse beginning 40 years after fire in their 70-year-old stand. Even if the ground-level aging error increases with stand age, as Peters et al. (2002) suggest, the magnitude of the errors they found is certainly not large enough to eliminate these recruitment lags and prolonged recruitment periods. Peters et al. (2002) reported data on only three older stands with a narrow range of conditions; in all of their stands the stand-replacing fire was synchronous with a mast year, and there were ample mature spruce seed trees at time of disturbance. In boreal mixedwoods, however, there is considerable spatial and temporal variation in the availability of a seed source, substrates for seed germination, and in the light resource available for seedling growth and survival (Lieffers and Stadt 1994; Wright et al. 1998; Canham et al. 1999). Thus, the older stands studied by Peters et al. (2002) represented a small fraction of the conditions for white
- Published
- 2003
35. Contrasting current and potential productivity and the influence of fire and species composition in the boreal forest: a case study in eastern Canada1.
- Author
-
Rapanoela, Rija, Raulier, Frédéric, Gauthier, Sylvie, Ouzennou, Hakim, Saucier, Jean-Pierre, and Bergeron, Yves
- Subjects
FOREST productivity ,FOREST fires ,TIMBER ,TAIGAS ,ECOLOGICAL disturbances - Abstract
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- Published
- 2015
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36. Strategic analysis of forest vulnerability to risk related to fire: an example from the coniferous boreal forest of Quebec1.
- Author
-
Gauthier, Sylvie, Raulier, Frédéric, Ouzennou, Hakim, and Saucier, Jean-Pierre
- Subjects
FOREST fires ,FOREST fire research ,FOREST productivity ,SUSTAINABLE forestry ,BLACK spruce ,CLIMATE change ,MANAGEMENT - Abstract
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- Published
- 2015
- Full Text
- View/download PDF
37. Exploring forest productivity at an early age after fire: a case study at the northern limit of commercial forests in Quebec1.
- Author
-
Van Bogaert, Rik, Gauthier, Sylvie, Raulier, Frédéric, Saucier, Jean-Pierre, Boucher, Dominique, Robitaille, André, and Bergeron, Yves
- Subjects
FOREST productivity ,COMMERCIAL forests ,CLIMATE change mitigation ,TIMBER - Abstract
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- Published
- 2015
- Full Text
- View/download PDF
38. Insects can limit seed productivity at the treeline.
- Author
-
Jameson, Ryan G., Trant, Andrew J., and Hermanutz, Luise
- Subjects
GRANIVORES ,PREDATORY insects ,SEED production (Botany) ,TIMBERLINE ,GERMINATION ,BLACK spruce ,FORESTRY & climate ,MOUNTAIN ecology - Abstract
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- Published
- 2015
- Full Text
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39. StatSAW: modelling lumber product assortment using zero-inflated Poisson regression.
- Author
-
Auty, David, Achim, Alexis, Bédard, Pierre, and Pothier, David
- Subjects
LUMBER ,RAW materials ,BLACK spruce ,SIMULATION methods & models ,POISSON processes - Abstract
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- Published
- 2014
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40. Erratum: Crown fire behaviour in a northern jack pine - black spruce forest
- Author
-
M. E. Maffey, J. A. Mason, Stephen W. Taylor, B. M. Wotton, G. R. Hartley, Miguel G. Cruz, R A Lanoville, N. Lavoie, Mike D. Flannigan, C. N. Stefner, T. W. Blake, G. N. Dalrymple, Martin E. Alexander, and Brian J. Stocks
- Subjects
Forest floor ,Jack pine ,Global and Planetary Change ,Geography ,Ecology ,Taiga ,Crown Fire ,Forest management ,Family and consumer science ,Forestry ,Black spruce ,Web site - Abstract
This paper reports on the behaviour of 1 0 experimental crown fires conducted between 1 997 and 2000 dur ing the International Crown F ire Model l ing Experiment ( lCFME) in Canada's Northwest Terri tories. The primary goal of I C F M E was a replicated series of high-intensity crown fires designed to val idate and improve existing theoretical and empirical models of crown fire behaviour. Fire behaviour characteristics were typical for fully developed boreal forest crown fires, with fires advancing at 1 5-70 m/min, consuming significant quantities of fuel ( 2 .8-5 .5 kg/m2) and releasing vast amounts of thermal heat energy. The resulting flame fronts commonly extended 25-40 m above the ground with head fire intensities up to 90 000 kW/m. Depth of bum ranged from 1 .4-3.6 cm, representing a 25%-65% reduction in the thickness of the forest floor layer. Most of the smaller diameter «3.0 cm) woody surface fuels were consumed, along with a significant proportion of the larger downed woody material . A high degree of fuel consump tion occurred in the understory and overstory canopy with very l ittle material less than 1 .0 cm in diameter remaining. The documentation of fire behaviour, fire danger, and fire weather conditions carried out during I C F M E permitted the evaluation of several empirically based N orth American fire behaviour prediction systems and models. Resume: Cet article traite du comportement de 1 0 feux de cime experimentaux provoques entre 1 997 et 2000 dans Ie cadre de l'Experience internationale de modelisation des feux de cimes ( E I MFC) dans les Territoires du Nord-Ouest au Canada. Le principal objectif de cette experience consistait a reproduire une serie de feux de cime de forte intensite con9us pour valider et ameliorer les modeles theoriques et empiriques existants de comportement des feux de cime. Les caracteristiques du comportement des feux de cime etaient typiques des feux de cime en foret boreale mature, OU les feux progressent a 1 5 a 70 m/min, en consumant d'importantes quantites de combustibles ( 2 ,8 a 5,5 kg/m2) et generent de fortes quantites d'energie thermique sous forme de chaleur. Les fronts de flamme qui en resultent s'elevaient gene ralement a 25 a 40 m au-dessus du sol avec des intensites a la tete du feu al l ant jusqu'a 90 000 kW/m. La profondeur de brGlage variait de 1 ,4 a 3,6 cm, ce qui representait une reduction de 25 % a 65 % de I'epaisseur de la couverture morte. La plupart des combustibles de surface de plus petit diametre «3,0 cm) ont ete consumes de meme qu'une im portante proportion du plus gros materiel l igneux au sol. II y a eu une forte consommation de combustibles dans Ie couvert des etages inferieur et superieur ou il restait tres peu de materiaux d'un diametre inferieur a 1 ,0 cm. La docu mentation du comportement du feu, Ie danger de feu et les conditions meteorologiques propices aux incendies fores tiers ont permis d'evaluer plusieurs systemes et modeles empiriques nord-americains de prediction du comportement des feux. [Traduit par la Redaction] Received 26 September 2003. Accepted 10 February 2004. Published on the N RC Research Press Web site at http: //cjfr.nrc.ca on 1 2 August 2004. B.J. Stocks,2 B.M. Wotton, M.D. Flannigan, J.A. Mason, C.R. Hartley, and T. W. Blake. N atural Resources Canada, Canadian Forest Service, Great Lakes Forestry Centre, 1 2 1 9 Queen Street East, Sault Ste. Marie, ON P6A 2E5, Canada. M.E. Alexander, CN. Stefner, and M.E. Maffey. N atural Resources Canada, Canadian Forest Service, Northern Forestry Centre, 53201 22 Street, Edmonton, AB T6H 3S5. Canada. S.W. Taylor and C.N. Dalrymple. Natural Resources Canada. Canadian Forest Service, Pacific Forestry Centre. 506 West Burnside Road, Victoria, BC V8Z I M5, Canada. N. Lavoie. University of Alberta, Faculty of Agriculture, Forestry, and Home Economics, Department of Renewable Resources, Edmonton, AB T6G 2 1 -1 I, Canada. M.C. Cruz. University of Montana, College of Forestry and Conservation, Missoula, MT 598 1 2, U SA. R.A. Lanoville. Government of Northwest Territories, Department of Resources, Wildlife and Economic Development, Forest Management Division, P.O. Box 7, Fort Smith, NT XOE OPO, Canada. IThis article is one of a selection of papers published in this Special Issue on The International Crown Fire Modelling Experiment ( I C F M E) in Canada's Northwest Territories: Advancing the Science of Fire Behaviour. "Corresponding author (e-mai l : bstocks@nrcan.gc.ca). Can. J. For. Res. 34: 1548-1560 (2004) doi: 10.1 1 39/X04-054 © 2004 N RC Canada
- Published
- 2006
41. Ecosite-based predictive modeling of black spruce ( Picea mariana) wood quality attributes in boreal Ontario.
- Author
-
Pokharel, Bharat, Dech, Jeffery P., Groot, Arthur, and Pitt, Doug
- Subjects
BLACK spruce ,PREDICTION models ,WOOD quality ,TAIGAS ,FOREST products - Abstract
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- Published
- 2014
- Full Text
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42. Black spruce growth response to varying levels of biomass harvest intensity across a range of soil types: 15-year results.
- Author
-
Morris, Dave M., Kwiaton, Martin M., and Duckert, Dan R.
- Subjects
BLACK spruce ,BIOMASS ,FOREST products industry ,SOIL classification ,LOGGING - Abstract
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- Published
- 2014
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43. Black spruce trees from fire-origin stands have higher wood mechanical properties than those from older, irregular stands1.
- Author
-
Torquato, Luciane Paes, Auty, David, Hernández, Roger E., Duchesne, Isabelle, Pothier, David, and Achim, Alexis
- Subjects
TAIGAS ,TREE mechanics ,TREE growth ,MODULUS of elasticity ,FLEXURAL strength ,TREE-rings ,BLACK spruce - Abstract
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- Published
- 2014
- Full Text
- View/download PDF
44. Age and size effects on seed productivity of northern black spruce.
- Author
-
Viglas, Jayme N., Brown, Carissa D., and Johnstone, Jill F.
- Subjects
SEED products ,BLACK spruce ,LOGISTIC regression analysis ,TREES ,FORESTS & forestry - Abstract
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- Published
- 2013
- Full Text
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45. Temporal changes in stem decay and dead and sound wood volumes in the northeastern Canadian boreal forest.
- Author
-
Barrette, Julie, Pothier, David, and Ward, Charles
- Subjects
PLANT stem diseases & pests ,DEAD trees ,TAIGAS ,WOOD ,BLACK spruce - Abstract
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- Published
- 2013
- Full Text
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46. Fine and coarse root parameters from mature black spruce displaying genetic × soil moisture interaction in growth.
- Subjects
BLACK spruce ,SOIL moisture ,BIOMASS ,PLANT roots ,SOIL depth - Abstract
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- Published
- 2012
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47. Moving towards carbon neutrality: CO2 exchange of a black spruce forest ecosystem during the first 10 years of recovery after harvest.
- Subjects
CARBON offsetting ,BLACK spruce ,SOIL respiration ,PHOTOSYNTHESIS - Abstract
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- Published
- 2012
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48. Long-term effects of thinning on growth and yield of an upland black spruce stand.
- Subjects
FOREST thinning ,PLANT growth ,BLACK spruce ,FORESTS & forestry ,FOREST management ,RETROSPECTIVE studies - Abstract
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- Published
- 2012
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49. Linking deadwood-associated beetles and fungi with wood decomposition rates in managed black spruce forests.
- Author
-
Jacobs, Jenna M. and Work, Timothy T.
- Subjects
BEETLES ,BLACK spruce ,FORESTS & forestry ,WOOD decay ,ECOLOGICAL niche ,ALFALFA weevil - Abstract
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- Published
- 2012
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50. Effect of chronic ammonium nitrate addition on the ectomycorrhizal community in a black spruce stand.
- Author
-
Rossi, Sergio, Bordeleau, Adam, Houle, Daniel, and Morin, Hubert
- Subjects
AMMONIUM ,NITRATE minerals ,ECTOMYCORRHIZAS ,BLACK spruce ,TWENTIETH century ,SOIL conditioners ,AMMONIUM nitrate ,COLONIZATION - Abstract
Copyright of Canadian Journal of Forest Research is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2012
- Full Text
- View/download PDF
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