Geographic variation of grand fir (Abiesgrandis) in the Pacific coast region: 10-year results from a provenance trial

1993 ◽  
Vol 23 (6) ◽  
pp. 1065-1072 ◽  
Author(s):  
Chang Yi Xie ◽  
Cheng C. Ying
Keyword(s):  
British Columbia ◽  
Geographic Variation ◽  
Frost Damage ◽  
Seed Sources ◽  
Forest Region ◽  
The Pacific ◽  
Variation Patterns ◽  
Natural Range ◽  
Region 10 ◽  
Coast Region

The performance of 23 grand fir (Abiesgrandis (Dougl.) Lindl.) seed sources representing the coastal range of the species was examined with respect to height, mortality, frost damage, stem defects, needle disease susceptibility, and lammas growth at four sites in the Vancouver forest region of British Columbia. Variation in height was highly significant among provenances and showed discernible patterns at all ages surveyed (1, 3, 6, 7, 8, 9, and 10 years from outplanting). Provenances from northern, coastal, and low-elevation regions grew tallest. The remaining characters were only investigated 10 years after outplanting. Among-provenance variation in mortality, frost damage, and stem defects was nonsignificant when two provenances from the southern end of the natural range were removed from the analysis. Resistance to needle disease (Uredinopsislongimucronata Faull) was significantly different among provenances and decreased with elevation. Geographic variation in the proportion of trees with lammas growth was also significant but did not display any apparent pattern. Variation patterns were similar at the four testing sites but among-site differences in the average performance were highly significant for all the traits investigated. Eastern Vancouver Island, British Columbia, and northeastern Olympia Peninsula, Washington, are recommended as primary areas of seed source for reforestation in the Vancouver forest region.

Late Pleistocene stratigraphy of south-central British Columbia

1978 ◽  
Vol 15 (6) ◽  
pp. 971-980 ◽  
Author(s):  
Robert J. Fulton ◽  
Geoffrey W. Smith
Keyword(s):  
British Columbia ◽  
North America ◽  
Great Lakes ◽  
Late Pleistocene ◽  
Pacific Coast ◽  
Coastal Regions ◽  
South Central ◽  
The Pacific ◽  
Valley Area ◽  
Coast Region

The late Pleistocene deposits of south-central British Columbia record two major glacial and two major nonglacial periods of deposition. The oldest recognized Pleistocene deposits, called Westwold Sediments, were deposited during a nonglacial interval more than 60 000 years ago. Little information is available on the climate of this period, but permafrost may have been present at one time during final stages of deposition of Westwold Sediments. The latter part of this nonglacial period is probably correlative with the early Wisconsin Substage of the Great Lakes – St. Lawrence Valley area. However, deposition of the Westwold Sediments may have begun during the Sangamon Interglacial.Okanagan Centre Drift is the name applied to sediments deposited during the glaciation that followed deposition of Westwold Sediments. Okanagan Centre Drift is known to be older than 43 800 years BP and probably is older than 51 000. It is considered to correlate with an early Wisconsin glacial period.Bessette Sediments were deposited during the last major nonglacial period, which in south-central British Columbia persisted from at least 43 800 years BP (possibly more than 51 000) to about 19 000 years BP. This episode corresponds to Olympia Interglaciation of the Pacific Coast region and the mid-Wisconsin Substage of the Great Lakes – St. Lawrence Valley area. During parts of Olympia Interglaciation the climate was probably as warm as the present-day climate in the interior of British Columbia. Information from coastal regions indicates that there may have been periods of cooler and moister climate.Kamloops Lake Drift was deposited during the last major glaciation of south-central British Columbia. Ice occupied lowland areas from approximately 19 000 to 10 000 years BP. This period corresponds approximately to the Fraser Glaciation of the Pacific Coast region and the late Wisconsin Substage of central and eastern parts of North America.

The Serrated Points of Central California

1940 ◽  
Vol 6 (2) ◽  
pp. 167-170 ◽  
Author(s):  
Ernest N. Johnson
Keyword(s):  
British Columbia ◽  
Sea Level ◽  
Pacific Coast ◽  
Great Part ◽  
Flood Plain ◽  
Central California ◽  
Chipped Stone ◽  
The Pacific ◽  
Plain Region ◽  
Coast Region

Serrated edges, and wonderful chipping techniques, are commonly displayed on chipped stone objects of the Pacific Coast region from California to British Columbia, but the greatest ultimate perfection of serration obtains in the so-called Stockton type points, peculiar to the delta and flood plain region near the confluence of the Sacramento and San Joaquin rivers. The distribution of these specialized forms seems to approximately conform with this great flood plain, which is, generally speaking, not much above sea-level. This area was called by the early Spaniards the “Tulares,” because a great part of it was an impenetrable swamp, covered by a rank growth of tule reeds.

THE CESTODA OF CANADIAN FISHES: I. THE PACIFIC COAST REGION

1932 ◽  
Vol 7 (1) ◽  
pp. 221-243 ◽  
Author(s):  
ROBERT ARNOLD WARDLE
Keyword(s):  
British Columbia ◽  
Pacific Coast ◽  
Pacific Salmon ◽  
Ophiodon Elongatus ◽  
The Pacific ◽  
The Common ◽  
Leptocottus Armatus ◽  
Coast Region

The results are given of a survey of the cestode fauna of 1,500 fishes representing 26 species common in the straits of Georgia, British Columbia. The survey yielded only five species of adult and four species of larval cestodes. No cestodes were found in members of the Pleuronectidae and Embiotocidae and—with one exception—the Scorpaenidae, and the rate of infection in other families was singularly low.The cestodarian species in Hydrolagus colliei is regarded as identical with the Atlantic Gyrocotyle urna Gr. et Wag. The common cestode of the Pacific salmon is regarded as Eubothrium oncorhynchi n. sp., closely allied with the European Eubothrium crassum Bloch. Bothriocephalus scorpii Müll. occurred in Leptocottus armatus and Hexagrammos decagrammus, Bothriocephalus occidentalis Linton in Leptocottus armatus and Sebastodes maliger, and Gilquinia tetrabothrius v. Ben. in Squalus sucklii; a redescription is given of the two latter species. The larval forms recorded were two species of Diphyllobothrium in Oncorhynchus, a species of Nybelinia in Ophiodon elongatus, and a species of Phyllobothrium in Oncorhynchus.

Experiments on Oral Secretion of the Rocky Mountain Wood Tick, Dermacentor andersoni Stiles (Acarina: Ixodidae)

1957 ◽  
Vol 89 (1) ◽  
pp. 1-5 ◽  
Author(s):  
J. D. Gregson
Keyword(s):  
British Columbia ◽  
Pacific Northwest ◽  
Rocky Mountain ◽  
Dermacentor Variabilis ◽  
Oral Secretion ◽  
Amblyomma Maculatum ◽  
Dermacentor Andersoni ◽  
The Pacific ◽  
Tick Paralysis ◽  
Rocky Mountain Wood Tick

Tick paralysis continues to be one of the most baffling and fascinating tickborne diseases in Canada. It was first reported in this country by Todd in 1912. Since then about 250 human cases, including 28 deaths, have been recorded from British Columbia. Outbreaks in cattle have affected up to 400 animals at a time, with losses in a herd as high as 65 head. Although the disease is most common in the Pacific northwest, where it is caused by the Rocky Mountain wood tick, Dermacentor andersoni Stiles, it has lately been reported as far south as Florida and has been produced by Dermacentor variabilis Say, Amblyomma maculatum Koch, and A. americanum (L.) (Gregson, 1953). The symptoms include a gradual ascending symmetrical flaccid paralysis. Apparently only man, sheep, cattle, dogs, and buffalo (one known instance) are susceptible, but even these may not necessarily be paralysed.

scholarly journals Conservation Evaluation of the Pacific Population of Dwarf Woollyheads, Psilocarphus brevissimus var. brevissimus, in Canada

2006 ◽  
Vol 120 (2) ◽  
pp. 163
Author(s):  
George W. Douglas ◽  
Jenifer L. Penny ◽  
Ksenia Barton
Keyword(s):  
British Columbia ◽  
Coalbed Methane ◽  
Groundwater Levels ◽  
Gas Drilling ◽  
Pacific Population ◽  
South Central ◽  
The Pacific ◽  
Recreational Vehicles ◽  
Forest Openings ◽  
Conservation Evaluation

In Canada, Dwarf Woolly-heads, Psilocarphus brevissimus var. brevissimus, is restricted to the Similkameen River valley, south of Princeton in southwestern British Columbia and the extreme southeast and southwest corners of Alberta and Saskatchewan, respectively. This paper deals with the three British Columbia populations which represent the northwestern limit of the species which ranges from south-central British Columbia, southward in the western United States to Montana, Idaho, Washington, Oregon, Nevada, Utah, Wyoming, California and Baja California, Mexico. In British Columbia, P. brevissimus is associated with calcareous vernal pools and ephemeral pond edges in large forest openings. This habitat is rare in the area the few existing populations could easily be extirpated or degraded through slight changes in groundwater levels, coalbed methane gas drilling, housing development or recreational vehicles.

1999 Pacific Northwest Labor History Association Conference

2000 ◽  
Vol 57 ◽  
pp. 117-119 ◽  
Author(s):  
Daniel Jacoby
Keyword(s):  
British Columbia ◽  
Pacific Northwest ◽  
Labor History ◽  
Definitive Answer ◽  
Preferable Alternative ◽  
The Pacific ◽  
The Moment ◽  
Academic Conferences

I cannot provide a definitive answer to those of us pondering what the best alternative to capitalism is, but after attending the Pacific Northwest Labor History Association (PNLHA) Conference in Westminster, British Columbia, over the weekend of May 28–30, 1999, I can tell you that this is certainly a preferable alternative to standard academic conferences. As usual, the PNLHA was able to produce a cadre of historians (from the trades as well as academia), active unionists, and old-timers whose memories are as tapable as a keg of beer. Although the association designates labor history as its subject, newly elected President Ross Rieder likes to say, “History ends the moment before now.”

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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