scholarly journals Genecology of 20 paper birch (Betula papyrifera Marsh.) provenances from British Columbia and northern Idaho.

2009 ◽  
Author(s):  
Nicole Balliet
Keyword(s):  
British Columbia ◽  
Betula Papyrifera ◽  
Paper Birch ◽  
Northern Idaho

scholarly journals Use of Wood Waste in Rehabilitation of Landings Constructed on Fine-Textured Soils, Central Interior British Columbia, Canada

2004 ◽  
Vol 19 (3) ◽  
pp. 175-183 ◽  
Author(s):  
Paul Sanborn ◽  
Chuck Bulmer ◽  
Dave Coopersmith
Keyword(s):  
British Columbia ◽  
Picea Glauca ◽  
Soil Bulk Density ◽  
N Fertilization ◽  
Betula Papyrifera ◽  
Access Structures ◽  
Recovery Treatment ◽  
Paper Birch ◽  
Interior West

Abstract Rehabilitation of temporary landings and roads constructed on fine-textured Alfisols must ameliorate poor soil structure, high bulk densities, and greatly reduced organic matter. A long-term field experiment in the central interior of British Columbia (BC) was begun in 1995 to compare soil properties and seedling growth on landings rehabilitated with three operationally feasible treatments: (1) incorporation of waste wood chips (140 t/ha, oven-dry basis), supplemented with 600 kg N/ha; (2) subsoiling; and (3) shallow tillage combined with recovery and spreading of topsoil. After 4 years, soil bulk density at 7–14 cm depth was lowest in the chip incorporation treatment. Although total C, N, and S, and mineralizable N concentrations were highest in the topsoil recovery treatment, the chip incorporation treatment had the highest 3-year growth rates of hybrid white spruce (Picea glauca × engelmannii). Foliar analyses indicated that macro- and micronutrient concentrations were generally adequate, with only S and Mg being of concern. Establishment of paper birch (Betula papyrifera) did not succeed due to severe rodent damage to seedlings, perhaps encouraged by rapid and dense revegetation by seeded agronomic legumes. Silviculturists should consider treatments involving incorporation of chipped wood wastes, with appropriate supplementary N fertilization, in rehabilitation of access structures on fine-textured soils in the BC central interior. West. J. Appl. For. 19(3):175–183.

Seed Source Testing of Paper Birch (Betula papyrifera) in the Interior of British Columbia

1999 ◽  
Vol 10 (1-2) ◽  
pp. 25-34 ◽  
Author(s):  
M. R. Carlson ◽  
V. G. Berger ◽  
C. D. B. Hawkins
Keyword(s):  
British Columbia ◽  
Seed Source ◽  
Betula Papyrifera ◽  
Paper Birch

scholarly journals Conservation Evaluation of Lemmon's Holly Fern, Polystichum lemmonii, a Threatened Fern in Canada

2004 ◽  
Vol 118 (2) ◽  
pp. 164
Author(s):  
George W. Douglas
Keyword(s):  
British Columbia ◽  
Road Construction ◽  
Montane Forest ◽  
Mountain Area ◽  
Forest Road ◽  
South Central ◽  
Northern Idaho ◽  
Mining Exploration ◽  
Conservation Evaluation ◽  
Forest Road Construction

In Canada, Lemmon's Holly Fern, Polystichum lemmonii, is restricted to the Baldy Mountain area on the eastern side of the Okanagan River valley in south-central British Columbia. This population represents the northern limits of the species which ranges south through northern Idaho, Washington and Oregon to northern California. In British Columbia, P. lemmonii is associated with ultramafic rocky ridges within a montane forest at an elevation of 1900 m. The population in the Baldy Mountain area is relatively small, unprotected and potentially imperilled by mining exploration, forest road construction or wildfires.

The millipede family Striariidae Bollman, 1893. II. New records and species of the genus Amplaria Chamberlin, 1941 (Diplopoda, Chordeumatida, Striarioidea)

Zootaxa ◽  
2021 ◽  
Vol 4908 (2) ◽  
pp. 205-224
Author(s):  
WILLIAM A. SHEAR
Keyword(s):  
British Columbia ◽  
New Species ◽  
North America ◽  
New Records ◽  
Western North America ◽  
San Luis ◽  
Senior Synonym ◽  
Northern Idaho

The millipede genus Amplaria Chamberlin, 1941 (senior synonym of Vaferaria Causey, 1958 and Speostriaria Causey, 1960) is endemic to western North America, from Mt. Palomar and San Luis Obispo, California, north to southwestern British Columbia, Canada, and east to northern Idaho. Seven species names are currently assigned to the genus. Below I describe ten additional new species: Amplaria crawfordi, Amplaria fontinalis, Amplaria rykkenae, Amplaria arcata, Amplaria baughi, Amplaria staceyi, Amplaria umatilla, Amplaria cervus, Amplaria mendocino and Amplaria flucticulus, and provide new records of Amplaria nazinta Chamberlin. 

Semiochemical-mediated aggregation of the ambrosia beetle Trypodendron betulae (Coleoptera: Curculionidae: Scolytinae)

2020 ◽  
Vol 153 (1) ◽  
pp. 91-102 ◽  
Author(s):  
Susanne Kühnholz ◽  
Regine Gries ◽  
John H. Borden
Keyword(s):  
Aggregation Pheromone ◽  
Field Trapping ◽  
Betula Papyrifera ◽  
Detection Analysis ◽  
Enantiomeric Ratio ◽  
Linalool Oxide ◽  
Electroantennographic Detection ◽  
Paper Birch ◽  
Trap Catches ◽  
Chromatographic Mass

AbstractPorapak Q-captured volatiles from both sexes of Trypodendron betulae Swaine (Coleoptera: Curculionidae: Scolytinae) excised from newly attacked logs of paper birch, Betula papyrifera Marshall (Betulaceae), as well as volatiles from unattacked birch logs, were analysed by coupled gas chromatographic electroantennographic detection analysis. Active compounds were identified by gas chromatographic mass spectroscopy. The enantiomeric ratio of 6-ethenyl-2,2,6-trimethyloxan-3-ol (linalool oxide pyranoid) was determined using a Cyclodex B column. Field-trapping experiments disclosed that the female-produced aggregation pheromone of T. betulae is a blend of the (3S,6R)-trans- and (3R,6R)-cis-linalool oxide pyranoid. Trap catches were synergistically increased when the pheromone was combined with both the host volatile ethanol and with conophthorin, which was found in female beetles as well as host volatiles. Use of linalool oxide pyranoid reproductively isolates T. betulae from sympatric Trypodendron Stephens species for which only (+)-lineatin has been identified as an aggregation pheromone.

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