Results 171 to 180 of about 3,264 (215)

Evaluation of black spruce (Picea mariana) as a bioindicator of aluminum contamination

Water, Air, & Soil Pollution, 1993
The aim of this work is to evaluate black spruce (Picea mariana) as an indicator of environmental aluminum contamination. The territory studied extends to a radius of 100 km around the Alcan aluminum refinery in Jonquiere, Quebec, Canada. Samples of wood were taken from the trunks of trees at 26 sites at distances of 5, 10, 20, 30, 40, 50 and 100 km ...
M. Dion, S. Loranger, G. Kennedy, F. Courchesne, J. Zayed   +4 more
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Volume increment efficiency of Picea mariana in northern Ontario, Canada

Forest Ecology and Management, 2008
Abstract Volume increment efficiency (VIE), a measure related to radiation use efficiency, is defined in this study as the annual total stemwood volume increment divided by the amount of global shortwave radiation intercepted by tree crowns during the photosynthetic season.
Arthur Groot, Jean-Pierre Saucier
openaire   +1 more source

Somatic Embryogenesis in Picea Mariana (Mill.)

1995
Black spruce (Picea mariana (Miller)) is one of seven spruce species native to North America. Its natural distribution extends from Labrador to Alaska and southward to New York, Minnesota, and Montana. The wood of Picea mariana is of great economic importance because of its wide use in the manufacture of paper pulp.
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Layering in Black Spruce (Picea mariana (Mill.) BSP.)

American Midland Naturalist, 1938
The general appearance is that of an older tree surrounded at the base with a fringe of small trees. A few instances have been noted where a tall central tree is surrounded by medium height trees close to it and those in turn by a fringe of smaller trees. (Figs.
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Prediction and evaluation of borate distribution in Eastern black spruce (Picea mariana var. mariana) wood products

Wood Science and Technology, 2015
Borate distribution and content in re-wetted brush-treated Eastern black spruce (Picea mariana var. mariana) blocks were investigated by near-infrared spectroscopy (NIRS). Samples were brush-treated with 40 % glycerol-based DOT (Na2B8O13 4H2O) and then conditioned for different durations (5, 9, 20, and 30 days) at high relative humidity (approaching ...
Thierry Koumbi-Mounanga, Paul I. Morris, Myung J. Lee, Nasmus M. Saadat, Brigitte Leblon, Paul A. Cooper   +5 more
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Germination of encapsulated embryos of interior spruce (Picea glauca engelmannii complex) and black spruce (Picea mariana Mill.)

Plant Cell Reports, 1993
Interior spruce (Picea glauca engelmannii complex) and black spruce (Picea mariana Mill.) cotyledonary somatic embryos were encapsulated in sodium alginate. Somatic embryo viability was retained, but germination occurred at a reduced frequency compared with the equivalent zygotic embryos.
Lulsdorf, Monika M., Tautorus, Thomas E., Kikcio, Susan I., Bethune, Terry D., Dunstan, David I.   +4 more
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White Spruce [Picea glauca (Moench) Voss] and Black Spruce [Picea mariana (Mill) B.S.P.]

1991
The genus Picea, the spruces, is a member of the family Pinaceae, the largest family of conifers. There are about 40 species of spruce (Safford 1974), found principally in north temperate regions of Europe, Asia, and North America. Picea glauca (Moench) Voss (white spruce), and Picea mariana (Mill) B.S.P.
S. M. Attree, D. I. Dunstan, L. C. Fowke
openaire   +1 more source

The taxonomy and genetics of Picea rubens and its relationship to Picea mariana

Canadian Journal of Botany, 1976
A range-wide sampling of Picea rubens Sarg. populations with a representative sampling of Picea mariana (Mill.) B.S.P. was made to investigate the variation within P. rubens and the nature and extent of hybridization between the two species. Factor analysis using 14, 21, and 24 characters, successively, indicated that the clusters of the parent ...
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Carbon assimilation variation and control in Picea rubens, Picea mariana, and their hybrids under ambient and elevated CO2

Trees, 2013
After 3 years of CO 2 treatments, A stimulation from ambient to elevated CO 2 was strongly related to the total dry mass change (%), supporting the sink demand
John E. Major, Alex Mossler, Debby C. Barsi, Moira Campbell, John Malcolm   +4 more
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Reproductive biology of Picea mariana (Mill.) BSP. at treeline

1977
Study of climatic effects on Picea mariana near Inuvik.
openaire   +1 more source