Pleistocene peccary, Platygonus compressus Le Conte, from Yukon Territory, Canada

1980 ◽  
Vol 17 (9) ◽  
pp. 1204-1209 ◽  
Author(s):  
B. F. Beebe
Keyword(s):  
United States ◽  
Cold Tolerance ◽  
Late Pleistocene ◽  
Yukon Territory ◽  
The Arctic ◽  
Northeastern United States ◽  
Northern Limit ◽  
Arctic Circle

A fragmented radius of a late Pleistocene peccary, Platygonus compressus Le Conte, has been recovered near Old Crow, Yukon Territory, Canada. The known northern limit of the species is thus extended approximately 3000 km, from the northeastern United States to north of the Arctic Circle in Pleistocene Beringia, and confirms the cold tolerance of the species. The small size of the specimen supports a theory that small size in P. compressus is correlated with periglacial environment. Although the age of the specimen is uncertain, a mid-Wisconsin age is inferred on the basis of availability of a route of dispersal to Beringia and palaeoecological evidence which suggest a largely treeless tundra dominated by sedges and grasses, but with a rich herb component.

Is Nut Cold Tolerance a Limitation to the Restoration of American Chestnut in the Northeastern United States?

2009 ◽  
Vol 27 (3) ◽  
pp. 266-268 ◽  
Author(s):  
P. G. Schaberg ◽  
K. M. Gurney ◽  
B. R. Janes ◽  
J. M. Halman ◽  
G. J. Hawley
Keyword(s):  
United States ◽  
Cold Tolerance ◽  
American Chestnut ◽  
Northeastern United States

Crop production in the Soviet Arctic

Polar Record ◽  
1951 ◽  
Vol 6 (42) ◽  
pp. 227-236 ◽  
Author(s):  
R. H. Richens
Keyword(s):  
Natural Environment ◽  
Crop Production ◽  
The Arctic ◽  
Arctic Zone ◽  
Northern Limit ◽  
Arctic Circle ◽  
Far North ◽  
Plant Life ◽  
Growing Conditions ◽  
Economic Considerations

The northern limit of agriculture depends not on physiographical conditions but on economic considerations. This truism is frequently emphasized by Soviet writers, who point out that it is possible to provide the requisite conditions for plant life at any point on the earth's surface. What determines whether or not a crop is to be grown is the extent to which agriculturalists are willing to provide the plant with its appropriate environment. The latter very rarely coincides with the natural environment, and in some cases, as in the far north, may differ greatly from it. The following survey attempts to outline the extent to which Soviet agriculturalists have gone in providing plants with suitable growing conditions north of the arctic circle. The question whether the objective of arctic agriculture, food and fodder for the arctic zone, could not be realized more conveniently by transporting produce from a milder clime, will also be discussed.

The Devil's Grass: Quackgrass

1987 ◽  
Vol 1 (2) ◽  
pp. 184-185 ◽  
Author(s):  
Larry W. Mitich
Keyword(s):  
United States ◽  
New Guinea ◽  
The United States ◽  
The Arctic ◽  
The South ◽  
Arctic Circle ◽  
Coffee Plantations ◽  
Northern United States ◽  
Almost All ◽  
Agropyron Repens

Quackgrass [Agropyron repens (L.) Beauv. #3 AGRRE] infests farms and gardens throughout the northern United States, southern Canada, almost all of Europe—its native home—and parts of Asia. It grows in Alaska, extends above the Arctic Circle in Norway, and plagues coffee plantations in New Guinea. While quackgrass occurs in every state in the United States, it is rarely a troublesome crop weed in the South.

scholarly journals The Evolution of Higher Education Collaboration in the Arctic Through Networking

2021 ◽  
pp. 127-130
Author(s):  
Outi Snellman
Keyword(s):  
Higher Education ◽  
United States ◽  
International Association ◽  
Arctic Region ◽  
Environmental Problems ◽  
The Arctic ◽  
Academic Collaboration ◽  
Arctic Circle ◽  
National Boundaries ◽  
The Cold War

AbstractAcademic collaboration across the Arctic region—the eight nations bordering the Arctic Circle (United States, Russia, Canada, Denmark/Greenland, Finland, Norway, Sweden and Iceland)—was extremely difficult and restricted during the Cold War years, despite efforts like the establishment of UNESCO and, indeed, the International Association of Universities. Issues and problems, however, do not respect national boundaries: for example, the emergence of massive environmental problems across borders in the region became quite clear during the 1980s. The iron curtain was successful in restricting the movement of people and ideas, but not pollutants.

Low Winter Temperatures and the European Pine Shoot Moth, Rhyacionia buoliana (Schiff.) in Ontario.

1962 ◽  
Vol 94 (3) ◽  
pp. 314-336 ◽  
Author(s):  
G. W. Green
Keyword(s):  
United States ◽  
New York ◽  
Insect Pests ◽  
Continuous Distribution ◽  
Lake Ontario ◽  
Pine Plantations ◽  
Northeastern United States ◽  
Northern Limit ◽  
Southern Ontario ◽  
Winter Temperatures

The European pine shoot moth, Rhyacionia buoliana (Schiff.), was first discovered in North America on Long Island, New York, in 1914 (Busck, 1914). Since that time it has spread throughout most of the northeastern United States, becoming one of the most important insect pests of pine plantations. In Ontario, it was first discovered in the Toronto area (McLaine, 1926) and since that time has dispersed throughout southern Ontario, appearing regvlarly south of a line from the southern end of Gcorgian Bay to a point just east of Lake Ontario (Fig. 1). Isolated occurrences of the shoot moth have been reported north of this line but these have been short-lived on small plantation trees, or have persisted in cities and towns on ornamentals protected by snow cover during the winter. The continuous distribution of the insect has remained relatively static since 1951, and it appears that the northern limit of its range in Ontario has been reached.

Monitoring air quality in class I wilderness areas of the northeastern United States using lichens and bryophytes

2016 ◽  
Author(s):  
Alison C. Dibble ◽  
James W. Hinds ◽  
Ralph Perron ◽  
Natalie Cleavitt ◽  
Richard L. Poirot ◽  
...  
Keyword(s):  
United States ◽  
Air Quality ◽  
Class I ◽  
Northeastern United States ◽  
Wilderness Areas
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