Wood-inhabiting microfungi isolated from Populus tremuloides from Alberta and northeastern British Columbia

1999 ◽  
Vol 77 (6) ◽  
pp. 898-905 ◽  
Author(s):  
Leonard J Hutchison
Keyword(s):  
British Columbia ◽  
Populus Tremuloides ◽  
Pure Culture ◽  
Healthy Tissue ◽  
Decayed Wood ◽  
Trembling Aspen ◽  
Aspen Wood ◽  
Hypoxylon Mammatum ◽  
Ophiostoma Piliferum

Forty-nine taxa of sporulating microfungi were isolated in pure culture from the bark and wood of living and recently cut stems of trembling aspen (Populus tremuloides) from several sites in central Alberta and northeastern British Columbia. Stems were either healthy, blue stained, or decayed, or else possessed cankers or black galls. Several ecological groupings of fungi were recognized, including wood-staining fungi (e.g., Ophiostoma piliferum), black-gall-associated fungi (e.g., Hyphozyma lignicola, Knufia cryptophialidica,Phoma etheridgei), canker-causing pathogens (e.g., Nectria cinnabarina, Tympanis spermatiospora, Valsa sordida), and fungi that could be referred to as endophytes. This latter group consisted of an assortment of fungi normally found in niches other than wood (e.g., Ciborinia whetzelii, Sporormiella similis), microfungi associated with decayed wood (e.g., Cryptosphaeria lignyota, Phialocephala fusca, Phialophora alba, Phialophora bubakii, or canker-causing fungi isolated from healthy tissue (e.g., Hypoxylon mammatum, Leucostoma nivea.Key words: microfungi, endophytes, Populus, aspen, wood, Ascomycota, hyphomycetes, coelomycetes.

Some Wood-Inhabiting Yeasts of Trembling Aspen (Populus tremuloides) from Alberta and Northeastern British Columbia

Mycologia ◽  
1994 ◽  
Vol 86 (3) ◽  
pp. 386 ◽  
Author(s):  
Leonard J. Hutchison ◽  
Yasuyuki Hiratsuka
Keyword(s):  
British Columbia ◽  
Populus Tremuloides ◽  
Trembling Aspen

Two infection sites of Hypoxylon mammatum in trembling aspen (Populus tremuloides)

1975 ◽  
Vol 53 (22) ◽  
pp. 2621-2624 ◽  
Author(s):  
Paul D. Manion
Keyword(s):  
Populus Tremuloides ◽  
Infection Site ◽  
Trembling Aspen ◽  
Naturally Occurring ◽  
Hypoxylon Mammatum ◽  
Common Infection

Observations and dissection of young naturally occurring cankers caused by Hypoxylon mammatum suggest that infection of second- and third-season-old stems and branches commonly takes place at the base of first- and second-season-old dead branches. A second but less common infection site is associated with galls caused by the insect Saperda concolor.

Phoma etheridgei sp.nov. from black galls and cankers of trembling aspen (Populus tremuloides) and its potential role as a bioprotectant against the aspen decay pathogen Phellinus tremulae

1994 ◽  
Vol 72 (10) ◽  
pp. 1424-1431 ◽  
Author(s):  
Leonard J. Hutchison ◽  
P. Chakravarty ◽  
Lawrence M. Kawchuk ◽  
Yasuyuki Hiratsuka
Keyword(s):  
Populus Tremuloides ◽  
Potential Role ◽  
Molecular Characteristics ◽  
Natural Ecosystem ◽  
Antifungal Compounds ◽  
Trembling Aspen ◽  
Aspen Wood ◽  
Liquid Media ◽  
Antifungal Metabolites

Phoma etheridgei is described and illustrated from isolates obtained from the bark of black galls and cankers of trembling aspen in Alberta. Comparisons are made with Phoma enteroleuca and several other mostly wood-inhabiting Phoma spp. using morphological, physiological, and molecular characteristics. A key is provided for the differentiation of Phoma spp. that could potentially be isolated from Populus wood. Phoma etheridgei produced antifungal compounds that were strongly inhibitory in vitro to the aspen decay pathogen Phellinus tremulae on agar, in liquid media and on aspen wood chips, and may play a role in the natural ecosystem as an antagonist to Phellinus tremulae. Key words: Phoma etheridgei, taxonomy, black gall, antifungal metabolites, biological control, Phellinus tremulae, Populus tremuloides.

Nest tree use by primary cavity-nesting birds in south central British Columbia

1989 ◽  
Vol 67 (4) ◽  
pp. 1067-1073 ◽  
Author(s):  
Alton S. Harestad ◽  
Dagmar G. Keisker
Keyword(s):  
British Columbia ◽  
Populus Tremuloides ◽  
Douglas Fir ◽  
Trembling Aspen ◽  
Diameter At Breast Height ◽  
Breast Height ◽  
South Central ◽  
Cavity Nesting ◽  
Picoides Pubescens ◽  
Colaptes Auratus

Heartwood decay was the most important factor in nest tree selection by primary cavity-nesting birds in the Interior Douglas-fir Biogeoclimatic Zone of British Columbia. Of 243 active nests, most were in trembling aspen (Populus tremuloides) and paper birch (Betula papyrifera). Douglas-fir (Pseudotsuga menziesii) and hybrid spruce (Picea engelmannii × glauca) were not used for nesting. Strong excavators (Yellow-bellied Sapsucker (Sphyrapicus varius), Pileated Woodpecker (Dryocopus pileatus), and Hairy Woodpecker (Picoides villosus)) preferred to nest in live trembling aspen with heartwood decay. Weak excavators (Red-breasted Nuthatch (Sitta canadensis), Northern Flicker (Colaptes auratus), and Downy Woodpecker (Picoides pubescens)) preferred to nest in dead trees or dead tops of live trees. Yellow-bellied Sapsucker preferred to nest in trees larger than 30 cm diameter at breast height, and Pileated Woodpecker preferred trees larger than 40 cm diameter at breast height. No significant preference for nest tree diameter was detected for other species.

Seedling response of two trembling aspen (Populus tremuloides) families to infection by Hypoxylon mammatum

1996 ◽  
Vol 26 (5) ◽  
pp. 245-252 ◽  
Author(s):  
S. A. Enebak ◽  
B. Li ◽  
M. E. Ostry
Keyword(s):  
Populus Tremuloides ◽  
Trembling Aspen ◽  
Hypoxylon Mammatum

Characteristics and densities of Williamson’s Sapsucker nest trees in British Columbia

2009 ◽  
Vol 39 (12) ◽  
pp. 2319-2331 ◽  
Author(s):  
L. W. Gyug ◽  
C. Steeger ◽  
I. Ohanjanian
Keyword(s):  
British Columbia ◽  
Endangered Species ◽  
Populus Tremuloides ◽  
Stand Structure ◽  
Tree Density ◽  
Trembling Aspen ◽  
Larix Occidentalis ◽  
Western Larch ◽  
Term Maintenance

We characterized Williamson’s Sapsucker ( Sphyrapicus thyroideus (Cassin, 1852)) nest trees in southern British Columbia from 1995 to 2008 to determine the nesting requirements of this endangered species in Canada. In the East Kootenay (n = 32) and the Okanagan (n = 157) regions where western larch ( Larix occidentalis Nutt.) occurred, 81% and 75% of the nest trees were western larch, respectively. In regions west of the Okanagan Valley where western larch did not occur (n = 73), 77% of the nest trees were trembling aspen ( Populus tremuloides Michx.). Conifer nest trees were larger (72 cm DBH), on average, than broad-leaved nest trees (35 cm DBH), and this pattern was consistent across the breeding range of Williamson’s Sapsucker. Live western larch >67 cm DBH with either broken or dead tops were the trees with the highest frequency (20%) among the trees estimated to be suitable for nesting, primarily because these larch tended to be infected with heart rots. Based on observed densities, targets should be 1.36 suitable nest trees/ha in managed stands, although in many instances such as aspen patches, this target will only be met in portions of the nesting territories. The recommended stand structure for long-term maintenance of high nest-tree density in western larch stands is for ≥20 trees/ha with DBHs >57 cm and 60–150 trees/ha with DBHs >22 cm.

Climate sensitivity of trembling aspen radial growth along a productivity gradient in northeastern British Columbia, Canada

2008 ◽  
Vol 38 (5) ◽  
pp. 1211-1222 ◽  
Author(s):  
Giovanni Leonelli ◽  
Bernhard Denneler ◽  
Yves Bergeron
Keyword(s):  
British Columbia ◽  
Populus Tremuloides ◽  
Radial Growth ◽  
Site Index ◽  
Future Climate Change ◽  
Trembling Aspen ◽  
Tree Ring Chronology ◽  
Index Model ◽  
Productivity Gradient ◽  
Site Index Model

Growth–climate relationships were analyzed for 15 stands of trembling aspen ( Populus tremuloides Michx.) along a productivity gradient in northeastern British Columbia. Productivity was evaluated with a site index model whose values varied between 6.65 and 26.93 m height at age 50 years. To assess the role of climate on radial growth, we built a tree-ring chronology for each site and then performed a dendroclimatic analysis by means of bootstrapped correlation functions using monthly and annual climatic variables. We found that trembling aspen sensitivity to climate varied across stands with different productivities in the study area. At the more productive sites, trees were more sensitive to climate, and ring widths were positively correlated, particularly with summer month precipitation prior to the year of growth. The different responses to climate along the productivity gradient are likely related to the differences in substrate properties; substrates at the more productive sites are richer in nutrients and have a better water holding capacity than those of the less productive sites. Our study suggests that the effects of future climate change on tree growth may not only increase towards the limit of a species distribution, but also towards richer and wetter stands.

Height growth and site index models for trembling aspen (Populus tremuloides Michx.) in northern British Columbia

1998 ◽  
Vol 102 (2-3) ◽  
pp. 157-165 ◽  
Author(s):  
Han Y.H. Chen ◽  
Karel Klinka ◽  
Richard D. Kabzems
Keyword(s):  
British Columbia ◽  
Populus Tremuloides ◽  
Site Index ◽  
Height Growth ◽  
Trembling Aspen

Some wood-inhabiting yeasts of trembling aspen (Populus tremuloides) from Alberta and northeastern British Columbia

Mycologia ◽  
1994 ◽  
Vol 86 (3) ◽  
pp. 386-391 ◽  
Author(s):  
Leonard J. Hutchison ◽  
Yasuyuki Hiratsuka
Keyword(s):  
British Columbia ◽  
Populus Tremuloides ◽  
Trembling Aspen

Characterization of trembling aspen wood (Populus tremuloides L.) degraded with the white rot fungus Ceriporiopsis subvermispora and MWLs isolated thereof

2006 ◽  
Vol 64 (5) ◽  
pp. 415-422 ◽  
Author(s):  
Joon-Weon Choi ◽  
Don-Ha Choi ◽  
Sye-Hee Ahn ◽  
Sung-Suk Lee ◽  
Myung-Kil Kim ◽  
...  
Keyword(s):  
Populus Tremuloides ◽  
White Rot ◽  
White Rot Fungus ◽  
Trembling Aspen ◽  
Aspen Wood ◽  
Ceriporiopsis Subvermispora
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