On the Life History of the Douglas-fir Cone Moth, Barbara colfaxiana (Kft.) (Lepidoptera: Olethreutidae), and one of its Parasites, Glypta evetriae Cush. (Hymenoptera: Ichneumonidae)

1960 ◽  
Vol 92 (11) ◽  
pp. 826-834 ◽  
Author(s):  
A. F. Hedlin
Keyword(s):  
British Columbia ◽  
Life History ◽  
Rocky Mountains ◽  
Pacific Coast ◽  
Douglas Fir ◽  
Lake Area ◽  
Seed Loss ◽  
The Pacific ◽  
History Of ◽  
Loss Range

The Douglas-fir cone moth has been reported causing damage to cones and seeds of Douglas fir for a number of years; reports of seed loss range from light to almost 100 per cent. The insect occurs throughout the range of the host in British Columbia, the Pacific Coast States, and the Rocky Mountains.Observations recorded here were made during 1957 and 1958 in the Cowichan Lake area of Vancouver Island, and 1959 in the interior of British Columbia.

Life-History and Habits of Scolytus tsugae (Swaine) (Coleoptera: Scolytidae) in the Interior of British Columbia

1959 ◽  
Vol 91 (7) ◽  
pp. 416-426 ◽  
Author(s):  
L. H. McMullen ◽  
M. D. Atkins
Keyword(s):  
British Columbia ◽  
Life History ◽  
Pacific Coast ◽  
Rocky Mountain ◽  
Economic Importance ◽  
Douglas Fir ◽  
Dendroctonus Pseudotsugae ◽  
Small Areas ◽  
Rocky Mountain Region ◽  
The Pacific

Scolytus tsugae (Swaine) is a bark beetle that occurs throughout the Pacific Coast and Rocky Mountain Region and is common in the interior of British Columbia. Although Bedard (1938) reported that it had killed small areas of Douglas fir (Pseudotsuga menziesii (Mirb.) Franco) reproduction, it is of minor economic importance and usually confines its attack to tops, limbs, and logging slash. A knowledge of the life-history and habits of this insect is desirable for an understanding of the effects of interspecific competition on the development of the Douglas-fir beetle, Dendroctonus pseudotsugae Hopk., with which it is often associated in Douglas fir.

The Life History and Habits of Scolytus unispinosus Leconte (Coleoptera: Scolytidae) in the Interior of British Columbia

1962 ◽  
Vol 94 (1) ◽  
pp. 17-25 ◽  
Author(s):  
L. H. McMullen ◽  
M. D. Atkins
Keyword(s):  
British Columbia ◽  
Bark Beetles ◽  
Pacific Coast ◽  
Rocky Mountain ◽  
Economic Importance ◽  
Douglas Fir ◽  
Dendroctonus Pseudotsugae ◽  
Rocky Mountain Region ◽  
The Pacific ◽  
Standing Timber

The Douglas-fir engraver, Scolytus unispinosus Leconte, is a common bark beetle throughout the Pacific Coast and Rocky Mountain Region of North America. Although it occasionally kills young trees (Chamberlin, 1939), it is of minor economic importance, usually confining its attack to tops, limbs and logging slash. In standing timber it acts primarily as a secondary insect, attacking the tops and branches of trees killed or severely weakened by other agents. In the interior of British Columbia it is commonly found in Douglas fir, Pseudotsuga menziesii (Mirb.) Franco, and thus it is of interest as an associate of the Douglas-fir beetle, Dendroctonus pseudotsugae Hopk. Two other bark beetles Pseudohylesinus nebulosus (Leconte) and Scolytus tsugae (Swaine) with similar associations were studied earlier (Walters and McMullen, 1956; McMullen and Atkins, 1959).

The Life History and Immature Stages of Synergus pacificus McCracken and Egbert (Hymenoptera: Cynipidae)

1965 ◽  
Vol 97 (2) ◽  
pp. 185-188 ◽  
Author(s):  
David Evans
Keyword(s):  
British Columbia ◽  
Life History ◽  
Pacific Coast ◽  
Immature Stages ◽  
Central California ◽  
Larval Stages ◽  
The Pacific

AbstractSynergus pacificus McCracken and Egbert (Hymenoptera: Cynipidae) is an inquiline of oak gall cynipids in the Pacific Coast area from southern British Columbia to central California. Approximately 1,000 specimens were examined during the course of this study. Descriptions of the egg and larval stages are given, and information on life history and ecology is presented.

scholarly journals The first record of a trionychid turtle (Testudines: Trionychidae) from the Cretaceous of the Pacific Coast of North America

2018 ◽  
Vol 5 ◽  
Author(s):  
Matthew J. Vavrek ◽  
Donald B. Brinkman
Keyword(s):  
British Columbia ◽  
North America ◽  
Late Cretaceous ◽  
Rocky Mountains ◽  
Pacific Coast ◽  
First Record ◽  
Vancouver Island ◽  
The Pacific ◽  
Western Interior Basin ◽  
Cretaceous Deposits

Trionychid turtles were widespread throughout much of the Western Interior Basin of North America during the Cretaceous, represented by a wide variety of taxa. Despite their widespread abundance east of the Rocky Mountains, they have not previously been reported from Cretaceous deposits along the Pacific Coast of North America. We report here on an isolated trionychid costal from Vancouver Island, British Columbia. The fossil was recovered from the Late Cretaceous (Turonian to Maastrichtian) Nanaimo Group, on Vancouver Island, British Columbia. While the fossil is generically indeterminate, its presence adds an important datapoint in the biogeographic distribution of Trionychidae.  

Pollen morphology of Ligusticum (Apiaceae) in Canada

1985 ◽  
Vol 63 (10) ◽  
pp. 1880-1887 ◽  
Author(s):  
Richard J. Hebda
Keyword(s):  
British Columbia ◽  
Pollen Morphology ◽  
Pacific Coast ◽  
Polar View ◽  
Distinct Species ◽  
Pollen Type ◽  
Equatorial View ◽  
The Pacific ◽  
Pollen Types ◽  
History Of

The pollen morphology of the four Canadian taxa of Ligusticum (L. calderi, L. canbyi, L. scothicum ssp. scothicum, and L. scothicum ssp. hultenii) was studied under the light microscope and compared with that of other Apiaceae common on the Pacific coast of British Columbia and adjacent Alaska. Ligusticum calderi and L. canbyi compose one pollen type with a subrhomboidal outline in equatorial view and a triangular outline in polar view with pores located at the apices of the amb. Endopores are X-, H-, or dumbbell-shaped. The L. scothicum type is rectangular in equatorial view and circular in polar view, with pores arranged on the circumference. Endopores are usually rectangular to oval. Ligusticum calderi pollen is larger and thus distinct from L. canbyi pollen. All other Apiaceae pollen types examined are distinct from the L. calderi type because their pores are positioned between the lobes of the amb and because of differences in other characters. Since L. calderi pollen is readily separated from other Apiaceae on the British Columbia coast, it can be used to study the history of this geographically restricted species and the possibly refugial species associated with it. The size differences between L. calderi and L. canbyi pollen suggest that they are distinct species.

Life History and Habits of a Midge, Contarinia washingtonensis Johnson (Diptera: Cecidomyiidae), in Douglas-fir Cones

1963 ◽  
Vol 95 (11) ◽  
pp. 1168-1175 ◽  
Author(s):  
Alan F. Hedlin ◽  
Norman E. Johnson
Keyword(s):  
British Columbia ◽  
Life History ◽  
Late Summer ◽  
Douglas Fir ◽  
Direct Damage ◽  
Seed Loss

AbstractThe midge Contarinia washnigtonensis Johnson is capable of causing serious seed loss in Douglas-fir in British Columbia, Washington and Oregon. The female lays its eggs from late May until early July in the young cones. When the eggs hatch larvae feed in the cone scales, sometimes causing direct damage to seeds and often killing scales before cone maturity. When larvae have completed feeding they leave the cone scales in late summer and autumn to drop to the ground where they spin cocoons and remain overwinter in the litter.

Summary of Coastal Geologic Evidence for past Great Earthquakes at the Cascadia Subduction Zone

1995 ◽  
Vol 11 (1) ◽  
pp. 1-18 ◽  
Author(s):  
Brian F. Atwater ◽  
Alan R. Nelson ◽  
John J. Clague ◽  
Gary A. Carver ◽  
David K. Yamaguchi ◽  
...  
Keyword(s):  
British Columbia ◽  
North America ◽  
Subduction Zone ◽  
Forest Soils ◽  
Pacific Coast ◽  
Cascadia Subduction Zone ◽  
Level Change ◽  
The Past ◽  
The Pacific ◽  
Juan De Fuca

Earthquakes in the past few thousand years have left signs of land-level change, tsunamis, and shaking along the Pacific coast at the Cascadia subduction zone. Sudden lowering of land accounts for many of the buried marsh and forest soils at estuaries between southern British Columbia and northern California. Sand layers on some of these soils imply that tsunamis were triggered by some of the events that lowered the land. Liquefaction features show that inland shaking accompanied sudden coastal subsidence at the Washington-Oregon border about 300 years ago. The combined evidence for subsidence, tsunamis, and shaking shows that earthquakes of magnitude 8 or larger have occurred on the boundary between the overriding North America plate and the downgoing Juan de Fuca and Gorda plates. Intervals between the earthquakes are poorly known because of uncertainties about the number and ages of the earthquakes. Current estimates for individual intervals at specific coastal sites range from a few centuries to about one thousand years.

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