Lack of caching of direct-seeded Douglas fir seeds by deer mice

1978 ◽  
Vol 56 (5) ◽  
pp. 1214-1216 ◽  
Author(s):  
Thomas P. Sullivan
Keyword(s):  
British Columbia ◽  
Douglas Fir ◽  
Direct Seeding ◽  
Deer Mice ◽  
Seed Caching ◽  
Clear Cut ◽  
Direct Seeded ◽  
Coastal British Columbia

Seed caching by deer mice was investigated by radiotagging seeds in forest and clear-cut areas in coastal British Columbia. Deer mice tend to cache very few Douglas fir seeds in the fall when the seed is uniformly distributed and is at densities comparable with those used in direct-seeding programs.

scholarly journals Cost of pruning Douglas-fir in coastal British Columbia

1994 ◽  
Vol 70 (1) ◽  
pp. 80-83
Author(s):  
S. A. Y. Omule ◽  
D. E. Paul ◽  
L. M. Darling
Keyword(s):  
British Columbia ◽  
Key Words ◽  
Travel Time ◽  
Douglas Fir ◽  
Time Study ◽  
Average Spacing ◽  
The Cost ◽  
Coastal British Columbia

Artificial pruning can increase the quantity of high-value clear lumber harvested from Douglas-fir, but the pruning cost per tree is relatively high. To prune a young Douglas-fir to 6 metres in one lift and two lifts took, respectively, 9.5 and 10.1 minutes in 14- and 18-year old stands with average spacing between trees of about 3 metres on flat or 0-30% south-facing slopes in coastal British Columbia. The associated costs were $2.09 and $2.22. This included minor travel time between trees, but excluded the cost of travelling to the site, selecting and marking trees to be pruned, and purchasing and maintaining the pruning equipment. Differences in pruning time between one-lift pruning and two-lift pruning, in one or two passes, were small. A D-handled saw was preferred to the more strenuous snap-cut pruner with ratchet-style pinions, based on observations on a pruning time-study of 5 operators. Key words: pruning saw, snap-cut pruner, pruning time, one-lift pruning, two-lift pruning

STUDIES IN FOREST PATHOLOGY: XIV. DECAY OF DOUGLAS FIR IN THE COASTAL REGION OF BRITISH COLUMBIA

1954 ◽  
Vol 32 (5) ◽  
pp. 630-653 ◽  
Author(s):  
G. P. Thomas ◽  
R. W. Thomas
Keyword(s):  
British Columbia ◽  
Coastal Region ◽  
Douglas Fir ◽  
Tree Age ◽  
Separate Analysis ◽  
Average Amount ◽  
Old Growth ◽  
Dead Trees ◽  
Select Group ◽  
Coastal British Columbia

An investigation of Douglas fir, Pseudotsuga taxifolia (Poir.) Britton, in coastal British Columbia has shown that decay losses in old-growth stands are low, amounting to 2.6 and 7.3% of the gross volume of living and combined living and dead trees respectively. Twenty-five decay-producing fungi were isolated from living trees and 29 from dead trees. The most important of these were Fomes pini (Thore) Lloyd, Polyporus schweinitzii Fries, and Fomes pinicola (Sw.) Cke. Certain irregularities in the occurrence of decay-producing fungi and the amounts of decay associated with them were traced to the influences of site, tree age or size, latitude, and stand history. Root infections were the most frequent but branch-stub infections caused the greatest average amount of decay. An examination of tree abnormalities showed that a select group of them, sporophores and swollen knots of Fomes pini in particular, are useful indicators of hidden decay. A separate analysis of dead trees has shown that they occasion ally form a high proportion of Douglas fir stands and that much of the wood in such trees is sound.

New microfungi on coastal Douglas fir

1975 ◽  
Vol 53 (20) ◽  
pp. 2297-2302 ◽  
Author(s):  
A. Funk
Keyword(s):  
British Columbia ◽  
New Species ◽  
Pseudotsuga Menziesii ◽  
Douglas Fir ◽  
Three New Species ◽  
Coastal British Columbia

Three new species of ascomycetes and two coelomycetes are described from diseased Douglas fir (Pseudotsuga menziesii (Mirb.) Franco) from coastal British Columbia, Canada, viz., Coccomyces pseudotsugae n. sp., Phragmoporthe pseudotsugae n. sp., and Botryosphaeria pseudotsugae n. sp.; Phomopsis portei n. sp. and Haplosporella sp. are associated with the latter two ascomycetes, respectively, and possibly represent their conidial states.

Thermal regime of a headwater stream within a clear-cut, coastal British Columbia, Canada

2005 ◽  
Vol 19 (13) ◽  
pp. 2591-2608 ◽  
Author(s):  
R. D. Moore ◽  
P. Sutherland ◽  
T. Gomi ◽  
A. Dhakal
Keyword(s):  
British Columbia ◽  
Thermal Regime ◽  
Headwater Stream ◽  
Clear Cut ◽  
Coastal British Columbia

Relationships between deer mice and downed wood in managed forests of southern British Columbia

2006 ◽  
Vol 36 (9) ◽  
pp. 2189-2203 ◽  
Author(s):  
Vanessa J Craig ◽  
Walt Klenner ◽  
Michael C Feller ◽  
Thomas P Sullivan
Keyword(s):  
British Columbia ◽  
Population Dynamics ◽  
Vegetation Cover ◽  
High Elevation ◽  
Deer Mice ◽  
The South ◽  
Clear Cut ◽  
South Central ◽  
High Elevation Site ◽  
Downed Wood

We examined the relationship between deer mice (Peromyscus maniculatus (Wagner)) and downed wood in a low-elevation Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) forest and a high-elevation Engelmann spruce (Picea engelmannii Parry ex Engelm.) – subalpine fir (Abies lasiocarpa (Hook.) Nutt.) forest in the south-central interior of British Columbia. We experimentally manipulated the volume of downed wood on clear-cut and forested sites and monitored the response of deer mice with a mark–recapture study to assess population densities and survival and reproduction rates. Populations responded positively to harvesting at the low-elevation but not the high-elevation study area. At the low-elevation study area, the population dynamics of deer mice on clear-cut and forested treatments were not positively associated with patterns of vegetation cover or increasing downed-wood volumes. Instead, populations on clearcuts appeared to increase in response to an unknown factor associated with lower volumes. No relationship was detected between population dynamics of deer mice and downed-wood volumes at the high-elevation site. The population dynamics of deer mice on forests at the high-elevation site appeared to be more closely related to vegetation cover than to downed wood. The results indicated that downed wood is not a critical habitat component for deer mice in the south-central interior of British Columbia.

Growth of western red cedar seedlings in relation to microtopography, forest floor nutrient status, and fireweed and salal on clear-cut sites in coastal British Columbia

1992 ◽  
Vol 22 (3) ◽  
pp. 273-278 ◽  
Author(s):  
Christian Messier ◽  
James P. Kimmins
Keyword(s):  
British Columbia ◽  
Forest Floor ◽  
Nutrient Status ◽  
Ecological Significance ◽  
Total N ◽  
Cellulose Decomposition ◽  
Clear Cut ◽  
Red Cedar ◽  
Western Red Cedar ◽  
Coastal British Columbia

The growth of western red cedar (Thujaplicata Donn) seedlings was studied in relation to microtopography, to forest floor nutrient status, and to fireweed (Epilobiumangustifolium L.) and salal (Gaultheriashallon Pursh) abundance on 4-year-old logged and burned sites dominated by salal on northern Vancouver Island, British Columbia. These relationships were sought to determine some possible factors at the microsite level that influence the growth of western red cedar on recently clear-cut sites. Western red cedar growth and fireweed abundance and height were significantly greater in depressions than on flats and mounds, but these differences were not related to any major differences in forest floor pH, cellulose decomposition, total N and P, and available NH4+, NO3−, and phosphate P as measured using resin bags. The ecological significance of and possible reasons for the lack of correlation found between (i) western red cedar and fireweed growth and (ii) many measures of forest floor nutrient status are discussed.

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