NOTES ON THE OCCURENCE OF AEDES (OCHLEROTATUS) NEARCTICUS DYAR IN THE ROCKY MOUNTAINS PARK, ALBERTA. (CULICIDAE DIPT.)

1927 ◽  
Vol 59 (3) ◽  
pp. 61-63 ◽  
Author(s):  
Eric Hearle
Keyword(s):  
North America ◽  
Rocky Mountains ◽  
The Arctic ◽  
Arctic Regions ◽  
Secure Data ◽  
Interesting Species

One of the more interesting details of a recent investigation of the mosquitoes of the Rocky Mountains Park, Alberta, was the finding of Aedes nearcticus Dyar—a mosquito hitherto considered to be restricted to the Arctic regions of Europe and North America. A few specimens were first taken at Lake Louise in 1921, when Mr. Arthur Gibson, the Dominion Entomologist, and the writer made a brief survey of mosquito conditions. In 1922 further specimens came to hand through the kindness of Mr. N. B. Sanson who sent the writer living larvae collected at Simpson's Summit at about 7000 feet. Adults were successfully reared from these. During 1924 and 1925 a number of trips were made by the writer and his assistant, Mr. A. G. Mail, to secure data on this interesting species, and several hundred specimens of larvae, and both sexes of adults were taken.

Rights Over the Arctic

1930 ◽  
Vol 24 (4) ◽  
pp. 703-717 ◽  
Author(s):  
W. Lakhtine
Keyword(s):  
North America ◽  
Arctic Ocean ◽  
Far East ◽  
The Other ◽  
The Arctic ◽  
The North ◽  
Arctic Regions ◽  
The Far East ◽  
The Arctic Ocean ◽  
The One

The transarctic flights of 1926 and 1928 demonstrate the possibility of establishing communication by air across the Arctic regions between Europe, on the one side, and North America and the Far East on the other. Quite aside from the saving of time owing to shorter distance, the establishment of such communication presents considerably less diiSculty than air communication over the Atlantic: a conclusion derived from the transatlantic flights of the last three years. The experience of the airship Italia in May, 1928, does not at all nullify this conclusion. It serves merely to show that the organization of transarctic communication requires special prearrangements, such aa wireless stations, meteorological stations, landing-places, air-bases, the construction of which on the shores, islands, and even on the ice of the Arctic Ocean, appears to be quite feasible. The necessity for such stations has aroused in the governments of the North countries an increased interest in the Arctic regions which heretofore has been restricted to scientific circles.

Dog sledging in the eighteenth century: North America and Siberia

Polar Record ◽  
1998 ◽  
Vol 34 (190) ◽  
pp. 237-248 ◽  
Author(s):  
Jenny Mai Handford
Keyword(s):  
Eighteenth Century ◽  
North America ◽  
The Arctic ◽  
Reindeer Herding ◽  
Way Of Life ◽  
Southern Siberia ◽  
Native Peoples ◽  
Arctic Regions ◽  
The Relationship

AbstractThe different designs of sledges and dog harnesses, the methods of hitching used by the various peoples of the Arctic regions in the eighteenth century, and the influences they had on each other, are investigated. The development of dog sledging reflects not only the migrations of herding tribes of the steppe into southern Siberia — which progressively pushed some peoples farther and farther northeast — but the relationship between peoples whose culture was nomadic or more settled, whose way of life depended on reindeer herding or not, or who had earlier or later contact with the Russians or other Europeans. The Europeans in North America, it is argued, learned dog sledging from the Eskimos and taught it to the Indians. The Russians appear to have discovered dog sledging in Siberia, where their influence ultimately overcame many of the techniques of the native peoples. The Eskimos are found to have had the most-developed harnessing methods during the eighteenth century, and to have been the prevailing influence where they met with other sledging peoples.

Bryology in arctic and boreal North America and Greenland

1972 ◽  
Vol 50 (5) ◽  
pp. 1111-1133 ◽  
Author(s):  
W. B. Schofield
Keyword(s):  
North America ◽  
Distribution Patterns ◽  
Glacial Refugia ◽  
Ellesmere Island ◽  
The Arctic ◽  
Growth Forms ◽  
Arctic Regions ◽  
Northern Regions ◽  
Metabolic Activities ◽  
Reproductive Cycles

Bryological research in boreal and arctic North America is in very preliminary stages. Although the flora is moderately well documented, details are lacking in much of the region. Greenland, Alaska, and Ellesmere Island are better understood than the rest of the area. Much of the information has been accumulated as casual collections and observations and incidental to other research. Bryophyte cover in arctic regions is less than that of vascular plants; in boreal regions wetlands are often dominated by bryophytes and open forests have extensive moss carpets. Turfs dominate the growth forms in the arctic while in boreal regions whorled-branched turfs, wefts, and compact mats become the predominant growth forms. Bryophytes are important in plant community structure and dynamics of both boreal and arctic regions, but detailed studies are few. Cytology of arctic and boreal bryophytes in North America rests on a single paper, thus any generalizations are hazardous. Physiology of bryophytes in northern North America has been inadequately documented. The sexuality, reproductive cycles, growth rates, and metabolic activities of bryophytes are areas that could yield intriguing results. Reproduction in bryophytes in northern regions appears not to be greatly different from that of more southern regions. In spite of the shorter growing season and the terrain and climate favoring wind dispersal, this had not led to an increase in the incidence of asexual reproduction in spite of the fact that more than 60% of the bryophytes are dioicous. Bryogeographic patterns are similar to those of the vascular flora but the presence of western North American taxa in the easternmost arctic and their absence in intervening areas is highly suggestive of eastern refugia. Glacial refugia are supported by the bryophyte distributions; their presence in unglaciated Alaska–Yukon, Ellesmere Island, and parts of Greenland seems best documented. Thirty-six maps are given showing bryophyte distribution patterns in the region under discussion.

THE NORTHWARD DISTRIBUTION OF ANTS IN NORTH AMERICA

1972 ◽  
Vol 104 (7) ◽  
pp. 1073-1091 ◽  
Author(s):  
Robert E. Gregg
Keyword(s):  
North America ◽  
Great Lakes ◽  
Rocky Mountains ◽  
The Arctic ◽  
Ecological Framework ◽  
Hudson Bay ◽  
Arctic Zone ◽  
Far North ◽  
Number Of Species ◽  
Similarities And Differences

AbstractA study of the ant populations was made through a transect of mid-continent North America from Churchill on Hudson Bay and various localities around the Great Lakes to Iowa and northern Illinois. Data were obtained from extensive personal collecting and from literature sources. The results were assembled and discussed within an ecological framework provided by Merriam’s life zones, and showed a regular diminution in the variety and wealth of the ant faunas progressing from south to north. Though the number of species at Churchill is extremely reduced, ants nevertheless do occur there as established reproducing colonies, even in the presumed tundra habitats. These forms which exist so far north represent a highly impoverished remnant of richer faunas further south. Although none of the species is peculiar to the area, each must be tolerant of high boreal environments. A total of 135 species and subspecies are listed for the Carolinian and Alleghenian zones combined, 43 taxa for the Canadian Zone, 4 taxa for the Hudsonian Zone, and 4 also for the Arctic Zone. Comparisons with the recorded ant faunas of the Rocky Mountains of Colorado were made with respect to the corresponding zones, namely, the Plains (Upper Sonoran), Foothills or Submontane (Transition), Montane (Canadian), Subalpine (Hudsonian), and Alpine (Arctic) zones, and appropriate similarities and differences noted.

Sign in / Sign up

Export Citation Format

Share Document