Effect of seed source and nursery culture on paper birch (Betula papyrifera) uprooting resistance and field performance

2004 ◽  
Vol 196 (2-3) ◽  
pp. 425-433 ◽  
Author(s):  
K.A Campbell ◽  
C.D.B Hawkins
Keyword(s):  
Field Performance ◽  
Seed Source ◽  
Betula Papyrifera ◽  
Nursery Culture ◽  
Paper Birch

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

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.

scholarly journals Contrasting Release Approaches for a Mixed Paper Birch (Betula papyrifera)–Quaking Aspen (Populus tremuloides) Stand

2008 ◽  
Vol 25 (3) ◽  
pp. 124-132 ◽  
Author(s):  
Eric K. Zenner ◽  
Klaus J. Puettmann
Keyword(s):  
Populus Tremuloides ◽  
Basal Area ◽  
Complete Removal ◽  
Quaking Aspen ◽  
Betula Papyrifera ◽  
Mixed Stands ◽  
Early Release ◽  
Paper Birch ◽  
Area And Volume

Abstract Early release from competitors can be used to influence the species composition, quality, and rate of development of young stands. Release strategies can vary in intensity, ranging from complete removal of competitors and infrequent future entries (early, heavy, infrequent [EHI]) to lighter entries that are repeated more frequently (early, light, often [ELO]). It is unclear, however, which strategy is more successful for producing high-quality birch sawtimber (Betula papyrifera Marsh.) in mixed stands with aspen (Populus tremuloides Michx.). We evaluated the effects of various release intensities on the growth and mortality of a 16–18-ft-tall natural aspen–paper birch stand in Minnesota following density reductions from 1,500–3,000 trees ac−1 (trees per acre [TPA]) to 750 (ELO750), 500 (EHI500), and 250 (EHI250) TPA. After 6 years, paper birch was overtopped by aspen and contributed only 14% of basal area in control plots, but it occupied all diameter classes and contributed 77–87% of basal area in release plots. The basal area and volume of all paper birch and of only paper birch crop trees (100 largest TPA) were highest in lightly released ELO750 and lowest in control plots. Growth of mean quadratic diameter, basal area, and volume of paper birch was 2–3 times higher in release plots but independent of release intensity. Early release is necessary to maintain paper birch dominance, but there is no short-term advantage among treatment intensities. Long-term growth simulations using the Forest Vegetation Simulator suggest that merchantable timber production was unaffected by release strategy but that the EHI250 strategy produced the most birch sawtimber (40 times as much as in ELO750).

Effect of spatial scale on habitat use of Bolitotherus cornutus (Coleoptera: Tenebrionidae)

2005 ◽  
Vol 137 (2) ◽  
pp. 192-201 ◽  
Author(s):  
Sonja Teichert ◽  
Soren Bondrup-Nielsen
Keyword(s):  
Habitat Use ◽  
Spatial Scale ◽  
Betula Papyrifera ◽  
Fomes Fomentarius ◽  
Exploratory Approach ◽  
Paper Birch ◽  
Bolitotherus Cornutus ◽  
Coleoptera Tenebrionidae

AbstractThe habitat of Bolitotherus cornutus Panzer consists primarily of sporophores of the shelf fungus Fomes fomentarius (L.:Fr.) J. Kickx fil. Each sporophore is discrete and often several are present on a single dead log or standing snag, especially of paper birch (Betula papyrifera Marsh.). An exploratory approach was used to examine habitat use at three scales (the single sporophore, a single log supporting up to several sporophores, and a group of logs supporting sporophores) by modeling incidence of adult B. cornutus. Sporophore volume and decay were important for the beetles at all scales. Patches containing a variety of states of sporophores from alive to dead and decomposing are probably most suitable to B. cornutus. Results are compared with those for the related European beetle Bolitophagus reticulatus (L.), which is similar ecologically and also occupies F. fomentarius sporophores.

Paper birch (Betula papyrifera) shoot selection by moose (Alces alces) following a forest-cleaning experiment

2010 ◽  
Vol 25 (2) ◽  
pp. 157-163 ◽  
Author(s):  
Roy V. Rea ◽  
Dexter P. Hodder ◽  
Olav Hjeljord ◽  
Angelika Langen
Keyword(s):  
Alces Alces ◽  
Betula Papyrifera ◽  
Paper Birch

Consequences of elevated carbon dioxide and ozone for foliar chemical composition and dynamics in trembling aspen (Populus tremuloides) and paper birch (Betula papyrifera)

2001 ◽  
Vol 115 (3) ◽  
pp. 395-404 ◽  
Author(s):  
Richard L. Lindroth ◽  
Brian J. Kopper ◽  
William F.J. Parsons ◽  
James G. Bockheim ◽  
David F. Karnosky ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Chemical Composition ◽  
Populus Tremuloides ◽  
Elevated Carbon Dioxide ◽  
Betula Papyrifera ◽  
Trembling Aspen ◽  
Paper Birch
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