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

LATE-QUATERNARY FOSSIL CHIRONOMIDAE (DIPTERA) FROM HIPPA LAKE, QUEEN CHARLOTTE ISLANDS, BRITISH COLUMBIA, WITH SPECIAL REFERENCE TOCORYNOCERAZETT.

1988 ◽  
Vol 120 (8-9) ◽  
pp. 739-751 ◽  
Author(s):  
Ian R. Walker ◽  
Rolf W. Mathewes
Keyword(s):  
British Columbia ◽  
Special Reference ◽  
Climatic Change ◽  
North American ◽  
Late Quaternary ◽  
Glacial Refugium ◽  
Coastal Lakes ◽  
Queen Charlotte Islands ◽  
Early Arrival

AbstractChironomid stratigraphic analyses of sediment from Hippa Lake, Queen Charlotte Islands, B.C., revealed a fossil chironomid record unlike that reported for deeper lakes of southwestern British Columbia, but similar to an arctic Alaskan sequence. Little evidence of trophic succession or climatic change was noted.Chironomids, includingCorynoceranr.ambiguaZett., rapidly colonized the lake. Because the known adults ofCorynoceraZett. are brachypterous, the early arrival ofC. nr.ambiguaat Hippa Lake suggested either that this species survived in a Queen Charlotte glacial refugium, that chironomids can disperse very rapidly, even without active flight, or the existence of a previously undescribedCorynoceraspecies with well-developed wings.Elsewhere, fossils of theC.ambiguagroup are commonly associated with fossil oospores ofCharaValliant andNitellaAgardh. North American records are inconsistent, although similar correlations existed in some coastal lakes of British Columbia.

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.

Occella impi, a New Species of Sea Poacher from British Columbia with Notes on Related Species (Agonidae, Pisces)

1970 ◽  
Vol 27 (6) ◽  
pp. 1109-1114 ◽  
Author(s):  
C. G. Gruchy
Keyword(s):  
British Columbia ◽  
New Species ◽  
Related Species ◽  
Single Specimen ◽  
Queen Charlotte Islands ◽  
A New Species

Occella impi, a new species of sea poacher, is described from a single specimen captured in the Queen Charlotte Islands, British Columbia. Occella impi differs from other species of Occella in having spinous plates on the breast, the anus nearer the anal fin, and fewer anal rays; also, the numbers of bony body plates are distinctive. A key to the known species of Occella, based primarily on the numbers of bony body plates, is included. The size of the maxillary barbel and number of infralateral plates are shown to be characteristic of the genera Occella and Stellerina.

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