The Sphaeroceridae (Diptera) of the Queen Charlotte Islands, British Columbia

1991 ◽  
Vol 69 (2) ◽  
pp. 443-448 ◽  
Author(s):  
S. A. Marshall ◽  
Terry A. Wheeler
Keyword(s):  
British Columbia ◽  
North America ◽  
Rocky Mountains ◽  
Glacial Refugium ◽  
Coastal Forest ◽  
Coast Range ◽  
Postglacial Colonization ◽  
Source Areas ◽  
Queen Charlotte Islands ◽  
Parsimonious Explanation

Sphaeroceridae were collected in the Queen Charlotte Islands, British Columbia, in July 1988, and their distributional patterns were examined to test the hypothesis that the archipelago was the site of a Wisconsinan glacial refugium. A total of 27 species of Sphaeroceridae was identified. Ten of these species show widespread Holarctic distributions, four species are widespread across North America, seven species are restricted to North America west of the Rocky Mountains, three species are restricted to the coastal forest west of the Coast Range, and three species are supralittoral along the coast. There is no indication of endemism or relict distributions on the islands; the sphaerocerid fauna is similar to that found on the adjacent mainland. The most parsimonious explanation for the origin of the present sphaerocerid fauna of the archipelago is postglacial colonization from mainland North America. The sphaerocerid distribution pattern was compared with patterns for other Diptera and Coleoptera from the region. In general, the Sphaeroceridae corroborate the pattern seen in most other insect taxa, with postglacial dispersal from mainland source areas accounting for the present sphaerocerid fauna of the Queen Charlotte Islands.

III.—Recent Observations on the Glaciation of British Columbia and Adjacent Regions

1888 ◽  
Vol 5 (8) ◽  
pp. 347-350 ◽  
Author(s):  
Geo. M. Dawson
Keyword(s):  
British Columbia ◽  
Glacial Period ◽  
Coast Range ◽  
Coast Mountains ◽  
One Stage ◽  
Queen Charlotte Islands ◽  
Glacier Ice ◽  
Inland Ice ◽  
Great Valley ◽  
The U.S

Previous observations in British Columbia have shown that at one stage in the Glacial period—that of maximum glaciation—a great confluent ice-mass has occupied the region which may be named the Interior Plateau, between the Coast Mountains and Gold and Eocky Mountain Kanges. From the 55th to the 49th parallel this great glacier has left traces of its general southward or southeastward movement, which are distinct from those of subsequent local glaciers. The southern extensions or terminations of this confluent glacier, in Washington and Idaho Territories, have quite recently been examined by Mr. Bailley Willis and Prof. T. C. Chamberlin, of the U.S. Geological Survey. There is, further, evidence to show that this inland-ice flowed also, by transverse valleys and gaps, across the Coast Range, and that the fiords of the coast were thus deeply filled with glacier-ice which, supplemented by that originating on the Coast Range itself, buried the entire great valley which separates Vancouver Island from the mainland and discharged seaward round both ends of the island. Further north, the glacier extending from the mainland coast touched the northern shores of the Queen Charlotte Islands.

Mitochondrial DNA in Gasterosteus and Pleistocene Glacial Refugium on the Queen Charlotte Islands, British Columbia

Evolution ◽  
1993 ◽  
Vol 47 (2) ◽  
pp. 678 ◽  
Author(s):  
P. O'Reilly ◽  
T. E. Reimchen ◽  
R. Beech ◽  
C. Strobeck
Keyword(s):  
British Columbia ◽  
Mitochondrial Dna ◽  
Glacial Refugium ◽  
Queen Charlotte Islands

Mountain Climates of North America

2000 ◽  
Author(s):  
C. David Whiteman
Keyword(s):  
United States ◽  
North America ◽  
Sierra Nevada ◽  
Rocky Mountains ◽  
Climatic Conditions ◽  
Cascade Range ◽  
Coast Range ◽  
Alaska Range ◽  
Mountain Ranges ◽  
The Pacific

The basic climatic characteristics of the major mountain ranges in the United States—the Appalachians, the Coast Range, the Alaska Range, the Cascade Range, the Sierra Nevada, and the Rocky Mountains—can be described in terms of the four factors discussed in chapter 1. The mountains of North America extend latitudinally all the way from the Arctic Circle (66.5°N) to the tropic of Cancer (23.5°N) (figure 2.1). There are significant differences in day length and angle of solar radiation over this latitude belt that result in large seasonal and diurnal differences in the weather from north to south. Elevations in the contiguous United States extend from below sea level at Death Valley to over 14,000 ft (4270 m) in the Cascade Range, the Sierra Nevada, and the Rocky Mountains. Several prominent peaks along the Coast Range in Alaska and Canada (e.g., Mount St. Elias and Mount Logan) reach elevations above 18,000 ft (5486 m). Denali (20,320 ft or 6194 m) in the Alaska Range is the highest peak in North America. The highest peak in the Canadian Rockies is Mt. Robson, with an elevation of 12,972 ft (3954 m). The climates of the Coast Range, the Cascade Range, and the Sierra Nevada, all near the Pacific Ocean, are primarily maritime. The Appalachian Mountains of the eastern United States are subject to a maritime influence from the Atlantic Ocean and the Gulf of Mexico, but they are also affected by the prevailing westerly winds that bring continental climatic conditions. Only the climate of the Rocky Mountains, far from both the Pacific and Atlantic Oceans, is primarily continental. Each of the mountain ranges is influenced by regional circulations. For example, the Appalachians are exposed to the warm, moist winds brought northward by the Bermuda-Azores High and to the influence of the Gulf Stream. Similarly, the Coast Range feels the impact of the Pacific High, the Aleutian low, and the Japanese Current. A mountain range, depending on its size, shape, orientation, and location relative to air mass source regions, can itself affect the regional climate by acting as a barrier to regional flows.

A New Zygethopolys from Kentucky and a Key to the Members of the Genus. (Chilopoda: Lithobiomorpha: Lithobiidae: Ethopolyinae)

1953 ◽  
Vol 85 (3) ◽  
pp. 119-120 ◽  
Author(s):  
Ralph E. Crabill
Keyword(s):  
British Columbia ◽  
New Species ◽  
North America ◽  
Rocky Mountains ◽  
Special Interest ◽  
Pacific Islands ◽  
Western North America ◽  
Almost All ◽  
Established Species

Almost all of the members of the subfamily Ethopolyinae occur in western North America, a few Pacific islands, the Orient and Europe, but only one established species had been known from North America east of the Rocky Mountains. This widespread and very common form, Bothropolys multidentatus (Newport), ranges throughout the East as far west as Missouri. The present new species is therefore of special interest in that it is the second endemic member of the subfamily to he recorded from east of the Rockies. The only other members of Zygethopolys, a genus closely allied to Bothropolys, are known only from Alaska, British Columbia, and thk state of Washington.

The Curculionidae of the Queen Charlotte Islands, British Columbia (Insecta; Coleoptera)

1988 ◽  
Vol 66 (11) ◽  
pp. 2406-2414 ◽  
Author(s):  
Robert S. Anderson
Keyword(s):  
British Columbia ◽  
Source Area ◽  
Coastal Forest ◽  
Additional Species ◽  
Queen Charlotte Islands ◽  
Forest Region ◽  
Queen Charlotte Island ◽  
Alpine Species ◽  
Palearctic Region ◽  
Late Wisconsinan

Nineteen species of weevils are reported from the Queen Charlotte Islands, British Columbia. Nine species are found throughout the coastal forest region from California north to Alaska or British Columbia. Three species are widespread throughout western North American forests. Four species are found on sand beaches from California north to British Columbia. One species is found in alpine areas from southern British Columbia north to Alaska and the Aleutian and Pribilof islands. Two species are introduced into North America from the Palearctic Region. Three additional species are reported from the islands but their occurrence was not confirmed and they are left as questionable records. Adult individuals of all known species from populations on the Queen Charlotte Islands do not appear structurally differentiated from individuals examined from representative localities elsewhere. Postglacial recolonization of the islands from a southern source area by all native lowland to montane species and from a northern source area by the sole alpine species appears to be the most parsimonious account for the origin of the weevil fauna. There is no evidence to suggest survival of any species in a Late Wisconsinan refugium as has been proposed elsewhere for a number of other animals and plants endemic to the Queen Charlotte Island archipelago.

Stratigraphy, sedimentology, and regional correlation of the Horsethief Creek Group (Hadrynian, Late Precambrian) in the northern Purcell and Selkirk Mountains, British Columbia

1980 ◽  
Vol 17 (12) ◽  
pp. 1708-1724 ◽  
Author(s):  
T. P. Poulton ◽  
P. S. Simony
Keyword(s):  
British Columbia ◽  
Rocky Mountains ◽  
Submarine Fan ◽  
Source Areas ◽  
Late Precambrian ◽  
Coarse Sediment ◽  
Regional Correlation ◽  
Selkirk Mountains ◽  
Igneous Activity ◽  
Thickness Variations

The Hadrynian Horsethief Creek Group in the northernmost Purcell Mountains and adjacent Selkirk Mountains is subdivisible regionally into grit, slate, carbonate, and upper clastic divisions in upward succession. The grit division represents a submarine fan assemblage and the slate division hemipelagic muds probably deposited in intermediate depths. The carbonate division comprises an interval of discontinuous lenses representing "bahamian" carbonate bank and off-bank assemblages, and the upper clastic division is a heterogeneous clastic wedge, which shows some evidence of northerly and westerly increasing depositional depths. Feldspathic quartz pebble conglomerate beds intercalated with the carbonates in both bank and off-bank facies indicate tectonic activation of granitic source areas like those from which similar rocks in the upper part of the Miette Group of the Rocky Mountains were derived.The upper part of the slate division, which can be differentiated in western localities as a distinct semipelite–amphibolite unit, and the upper clastic division each expand in thickness northwestward to dominate the Horsethief Creek outcrops in the Selkirk Mountains. These thickness variations, the increase of amphibolite northward in the semipelite–amphibolite unit, and the loss of grit beds northward in the slate division suggest deposition in a depocentre that received coarse sediment from southerly and easterly directions, and that became the site of mafic igneous activity.

Molluscan biostratigraphy and paleomagnetism of Campanian strata, Queen Charlotte Islands, British Columbia: implications for Pacific coast North America biochronology

2009 ◽  
Vol 30 (4) ◽  
pp. 939-951 ◽  
Author(s):  
James W. Haggart ◽  
Peter D. Ward ◽  
Timothy D. Raub ◽  
Elizabeth S. Carter ◽  
Joseph L. Kirschvink
Keyword(s):  
British Columbia ◽  
North America ◽  
Pacific Coast ◽  
Queen Charlotte Islands

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.  

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