New evidence for the age of the Skonun Formation, Queen Charlotte Islands, British Columbia

1981 ◽  
Vol 18 (12) ◽  
pp. 1900-1903 ◽  
Author(s):  
N. Champigny ◽  
C. M. Henderson ◽  
G. E. Rouse
Keyword(s):  
British Columbia ◽  
Pacific Northwest ◽  
Middle Miocene ◽  
Early Miocene ◽  
Queen Charlotte Islands ◽  
The Pacific ◽  
New Evidence

Recent palynological, megafaunal, and intrusive evidence from a section low in the Skonun Formation in the Cinola deposit on Graham Island indicates that it was deposited in the late Early Miocene, and that the age of the Skonun ranges up to the early Middle Miocene in outcrop sections on northeastern Graham Island. Correlations are made with several Miocene series of the Pacific Northwest and Alaska.

Sediment transfer by shallow landsliding in the Queen Charlotte Islands, British Columbia

2002 ◽  
Vol 39 (2) ◽  
pp. 189-205 ◽  
Author(s):  
Yvonne Martin ◽  
Kenneth Rood ◽  
James W Schwab ◽  
Michael Church
Keyword(s):  
British Columbia ◽  
Pacific Northwest ◽  
Probability Distributions ◽  
Sampling Period ◽  
Sampling Bias ◽  
Drainage Basins ◽  
Physical Mechanisms ◽  
Queen Charlotte Islands ◽  
The Pacific ◽  
Sediment Transfer

Despite the importance of landsliding in routing sediment through mountainous drainage basins, few studies have documented landsliding rates over extended time and space scales. We have investigated landsliding in surficial material in the Queen Charlotte Islands using a large inventory of events, derived from aerial photography, covering an area of 166.7 km2. The mean erosion rate for shallow landsliding is 0.10 mm·a–1, which is at the upper end of shallow landsliding rates observed in the Pacific Northwest and coastal British Columbia, but several orders of magnitude lower than rock-based landsliding rates reported in the literature. Probability distributions for landslide area and volume are somewhat convex in form. Flattening of the curve found at low magnitudes may be due to sampling bias or physical mechanisms inhibiting failure, and the steepening for high values may exist because the sampling period is not long enough to adequately represent large events. Landslides generally initiate on hillslope gradients greater than 0.50–0.60. The largest numbers of landslides occur on south- to southwest-facing slopes and east- to northeast-facing slopes. Most events occur on concave and straight hillslopes in upper-slope positions. Landsliding rates were found not to be affected by rock type. Hillslopes in the Queen Charlotte Islands are often mantled by weathered Quaternary deposits and, hence, landsliding events are not directly controlled by weathering of bedrock. About 31% of landslides identified in this study deposited material in stream reaches, with about 83% of these landslides deposited in reaches with gradients between 3% and 10%.

The lichens and lichenicolous fungi of Haida Gwaii (Queen Charlotte Islands), British Columbia, Canada. 5. A new species of Lecanora from shoreline rocksThis paper is one of a selection of papers published as part of the special Schofield Gedenkschrift.

Botany ◽  
2010 ◽  
Vol 88 (4) ◽  
pp. 352-358 ◽  
Author(s):  
Irwin M. Brodo
Keyword(s):  
British Columbia ◽  
New Species ◽  
Pacific Northwest ◽  
Similar Species ◽  
Haida Gwaii ◽  
Queen Charlotte Islands ◽  
The Pacific ◽  
A New Species ◽  
Selection Of ◽  
Northeast Coast

A species of Lecanora in the L. dispersa group, with a well-developed pale thallus and a granular epihymenium, resembling L. albescens , is found exclusively on shoreline rocks and appears to be new. It is described as Lecanora schofieldii  sp. nov., found mainly in the Pacific Northwest, but also rarely on the northeast coast. Its distinctions from similar species on shoreline rocks are given, together with a key for their identification. The first western record of L. xylophila from rocks is given.

SAWFLY BIOLOGIES.: I. NEODIPRION TSUGAE MIDDLETON

1936 ◽  
Vol 68 (4) ◽  
pp. 71-79 ◽  
Author(s):  
Geo. R. Hopping ◽  
H. B. Leech
Keyword(s):  
British Columbia ◽  
Pacific Northwest ◽  
Western Hemlock ◽  
Queen Charlotte Islands ◽  
The Pacific

The western hemlock sawfly, Neodiprion tsugae Middleron, first came to our notice from the Queen Charlotte Islands, British Columbia. In 1931, reports of the dying of hemlocks over large areas came from rangers and timber operators of this region. A survey conducted by Mr. W. G. Mathers of the Dominion Entomological Branch, in September and October of that year, indicated that the injury extended over approximately forty square miles. In 1932, the outbreak showed definite signs of subsiding, and had practically disappeared by 1933, although many trees were killed during the peak year of 1931, indicating that this is a primary enemy of western hemlock, and that outbreaks may be expected from time to time in the Pacific Northwest.

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.

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.”

Notes on Parathion-Resistant Strains of Two Phytophagous Mites and a Predacious Mite in British Columbia

1958 ◽  
Vol 90 (2) ◽  
pp. 92-97 ◽  
Author(s):  
C. V. G. Morgan ◽  
N. H. Anderson
Keyword(s):  
British Columbia ◽  
Pacific Northwest ◽  
Predacious Mites ◽  
Predacious Mite ◽  
Phytophagous Mites ◽  
European Red Mite ◽  
The Pacific ◽  
Resistant Strains ◽  
Tetranychus Pacificus

The existence of strains of mites resistant to parathion has been well established (Garman, 1950; Lienk, Dean, & Chapman, 1952; Newcomer & Dean, 1952; Smith & Fulton, 1951). Resistant strains of the European red mite, Metatetranychus ulmi (Koch), first occurred in orchards of the Pacific northwest in 1950 (Newcomer, 1951; O'Neill & Hantsbarger, 1951), approximately three years after parathion was first used as an acaricide. Two other species of orchard mites, the Pacific mite, Tetranychus pacificus McG., and T. mcdanieli McG., were subsequently reported to have developed parathion-resistant strains in the same area (Newcomer & Dean, 1953). Though parathion is lethal to most predacious mites and insects, Huffaker and Kennett (1953) found a difference in tolerance between species of Typhlodromus in the field and in the laboratory: T. reticulatus Oudms. was very susceptible to parathion whereas T. occidentalis Nesbitt was not appreciably affected by it.

The emergence of Cryptococcus gattii in British Columbia and the Pacific Northwest

2008 ◽  
Vol 10 (1) ◽  
pp. 58-65 ◽  
Author(s):  
Karen H. Bartlett ◽  
Sarah E. Kidd ◽  
James W. Kronstad
Keyword(s):  
British Columbia ◽  
Pacific Northwest ◽  
Cryptococcus Gattii ◽  
The Pacific

Bioactivity-guided isolation of the active compounds from Rosa nutkana and quantitative analysis of ascorbic acid by HPLCThis article is one of a selection of papers published in this special issue (part 1 of 2) on the Safety and Efficacy of Natural Health Products.

2007 ◽  
Vol 85 (9) ◽  
pp. 865-871 ◽  
Author(s):  
Eduardo M. Jovel ◽  
Xi Ling Zhou ◽  
Dong Sheng Ming ◽  
Tanya R. Wahbe ◽  
G.H. Neil Towers
Keyword(s):  
British Columbia ◽  
Ascorbic Acid ◽  
Pacific Northwest ◽  
Aboriginal People ◽  
Natural Health Products ◽  
Magnetic Resonance Data ◽  
Therapeutic Uses ◽  
The Pacific ◽  
Health Products ◽  
Weak Antibacterial Activity

Rosa nutkana Presl. (Rosaceae) is distributed abundantly throughout central and southern areas of British Columbia, Canada. Aboriginal people in the Pacific Northwest have traditionally used R. nutkana as a food, medicine, and source of cultural material. The methanolic extract of the fruits of R. nutkana was previously found to have inhibitory activity against methicillin-resistant Staphylococcus aureus (MRSA). In our study, bioactivity-guided fractionation of the methanol extract from R. nutkana led to the isolation of the following 10 compounds: (i) tormentic acid, (ii) euscaphic acid, (iii) ursolic acid, (iv) maslinic acid, (v) quercetin, (vi) catechin gallate, (vii) quercetin-3-O-glucoside, (viii) 1,2,3,4,6-penta-O-galloyl-β-d-glucoside, (ix) l-ascorbic acid (vitamin C), and (x) 1,6-digalloyl-β-d-glucoside. Structures were elucidated by ultraviolet, infrared, mass spectrometry, and nuclear magnetic resonance data, as well as by comparison with those of the literature. The compounds quercetin, catechin gallate, quercetin-3-O-glucoside, 1,2,3,4,6-penta-O-galloyl-β-d-glucoside, and 1,6-digalloyl-β-d-glucoside exhibited weak antibacterial activity against MRSA. Our research demonstrates the value of traditional knowledge held by Aboriginal people in the Pacific Northwest with respect to uses of R. nutkana. Some described uses in the ethnobotanical literature correspond to activities observed under laboratory conditions. Further work on British Columbia Rosa spp. may contribute to identifying other potential therapeutic uses.

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