Monitoring the state of a large boreal forest region in eastern Canada through the use of multitemporal classified satellite imagery

2012 ◽  
Vol 38 (1) ◽  
pp. 91-108 ◽  
Author(s):  
O. Valeria ◽  
A. Laamrani ◽  
A. Beaudoin
Keyword(s):  
Boreal Forest ◽  
Satellite Imagery ◽  
The State ◽  
Eastern Canada ◽  
Forest Region ◽  
Boreal Forest Region

Cellular slime molds in forest soils of eastern Canada

1972 ◽  
Vol 50 (7) ◽  
pp. 1497-1501 ◽  
Author(s):  
James C. Cavender
Keyword(s):  
Boreal Forest ◽  
Forest Soils ◽  
Deciduous Forest ◽  
Eastern Canada ◽  
Forest Patches ◽  
Slime Molds ◽  
Forest Region ◽  
Cellular Slime ◽  
Cellular Slime Molds ◽  
Boreal Forest Region

The occurrence and distribution of cellular slime molds in eastern Canada were investigated. Particular attention was given to boreal forest since there is no previous study of Acrasieae in soils of this forest formation. Four species, Dictyostelium mucoroides, D. minutum, Polysphondylium pallidum, and P. violaceum, are common in spruce–fir forest soils. Of these only D. mucoroides and D. minutum are constant and dominant. Numbers per unit of soil averaged higher than in other forest soil habitats investigated during the course of the author's researches. The relatively high densities, up to ca. 20 000/g, were limited to certain sites within a forest, probably where abundant bacteria exist, although this was not determined. Occasionally D. discoideum, D. lacteum, and Acytostelium leptosomum can also be found in the boreal forest region. Two other species, D. purpureum and D. polycephalum, were found only in deciduous forest. The distribution of Acrasieae probably extends well beyond the boreal forest proper into the hemiarctic of tundra–forest patches.

Fungi of the Canadian boreal forest region: Catulus aquilonius gen. et sp.nov., a hyperparasite on Seuratia millardetii

1978 ◽  
Vol 56 (19) ◽  
pp. 2344-2347 ◽  
Author(s):  
D. Malloch ◽  
C. T. Rogerson
Keyword(s):  
Boreal Forest ◽  
New Genus ◽  
New Genus And Species ◽  
Forest Region ◽  
Canadian Boreal Forest ◽  
Boreal Forest Region

A new genus and species of ascomycetes, Catulus aquilonius, is described, illustrated, and tentatively assigned to the Mycosphaerellaceae. It grows as a parasite on stromata of Seuratia millardetii (Raciborski) Meeker and is characterized by two-celled, setulose ascospores.

Kraft Pulping and Specific Gravity in the Uppermost Stem of Fertilized Balsam Fir

1975 ◽  
Vol 5 (3) ◽  
pp. 399-402 ◽  
Author(s):  
J. D. Gagnon ◽  
K. Hunt
Keyword(s):  
Specific Gravity ◽  
Boreal Forest ◽  
Kraft Pulping ◽  
Balsam Fir ◽  
Pulp Yield ◽  
Kraft Process ◽  
Forest Region ◽  
The Mean ◽  
Boreal Forest Region

Samples of five pairs of fertilized and non-fertilized 60-year-old natural balsam fir (Abiesbalsamea (L.) Mill.) growing in the Quebec boreal forest region were pulped by the kraft process and the specific gravity was measured. Analyses carried out 7 years after treatment on the last seven terminal internodes revealed the mean pulp yield of trees fertilized exceeded that of non-fertilized by 7%, while the mean specific gravity was about 6% lower.

scholarly journals Landscape control of uranium and thorium in boreal streams – spatiotemporal variability and the role of wetlands

2012 ◽  
Vol 9 (3) ◽  
pp. 2823-2849 ◽  
Author(s):  
F. Lidman ◽  
C. M. Mörth ◽  
H. Laudon
Keyword(s):  
Boreal Forest ◽  
Gamma Spectrometry ◽  
Spatiotemporal Variability ◽  
Forest Landscape ◽  
Spatiotemporal Variations ◽  
Forest Region ◽  
Boreal Streams ◽  
Landscape Control ◽  
Boreal Forest Region

Abstract. The concentrations of uranium and thorium in ten partly nested streams in the boreal forest region were monitored over a two-year period. Considerable spatiotemporal variations were observed, with little or no correlation between streams. The export of both uranium and thorium varied substantially between the subcatchments, ranging from 1.7 to 30 g km−2 a−1 for uranium and from 3.2 to 24 g km−2 a−1 for thorium. Airborne gamma spectrometry was used to measure the concentrations of uranium and thorium in surface soils throughout the catchment, but could not explain the variability in the export. Instead, the extent of lakes and mires within each subcatchment was found to be a stronger predictor for the transport of uranium and thorium. The results indicate that there is a predictable and systematic accumulation of both uranium and thorium in boreal mires. Approximately 65–80 % of uranium and 55–65 % of thorium entering a mire is estimated to be retained in the peat. Overall, accumulation in mires and other types of wetlands is estimated to decrease the fluxes of uranium and thorium from the boreal forest landscape by 30–40 %. The atmospheric deposition of uranium and thorium was also quantified and its contribution to boreal streams was found to be low compared to weathering.

Satellite Based Engineering-Terrain Mapping of Canada's Boreal Forest Region

2000 ◽  
Author(s):  
V Singhroy ◽  
P Barnett ◽  
S M Yatabe ◽  
R Saint-Jean
Keyword(s):  
Boreal Forest ◽  
Terrain Mapping ◽  
Forest Region ◽  
Boreal Forest Region
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