scholarly journals A New Combination in Toxicoscordion (Melanthiaceae) for the Rocky Mountain Region, North America

2009 ◽  
Vol 19 (3) ◽  
pp. 295-296
Author(s):  
Jeffrey W. Brasher
Keyword(s):  
North America ◽  
Rocky Mountain ◽  
Mountain Region ◽  
New Combination ◽  
Rocky Mountain Region

Paleoecology and Late Quaternary Environments of the Colorado Rockies

2001 ◽  
Author(s):  
Scott A. Elias
Keyword(s):  
North America ◽  
Late Quaternary ◽  
Ice Sheets ◽  
Ice Sheet ◽  
Rocky Mountain ◽  
Mountain Region ◽  
Ice Age ◽  
Rocky Mountain Region ◽  
Last Ice Age ◽  
Teton Range

Present-day environments cannot be completely understood without knowledge of their history since the last ice age. Paleoecological studies show that the modern ecosystems did not spring full-blown onto the Rocky Mountain region within the last few centuries. Rather, they are the product of a massive reshuffling of species that was brought about by the last ice age and indeed continues to this day. Chronologically, this chapter covers the late Quaternary Period: the last 25,000 years. During this interval, ice sheets advanced southward, covering Canada and much of the northern tier of states in the United States. Glaciers crept down from mountaintops to fill high valleys in the Rockies and Sierras. The late Quaternary interval is important because it bridges the gap between the ice-age world and modern environments and biota. It was a time of great change, in both physical environments and biological communities. The Wisconsin Glaciation is called the Pinedale Glaciation in the Rocky Mountain region (after terminal moraines near the town of Pinedale, Wyoming; see chapter 4). The Pinedale Glaciation began after the last (Sangamon) Interglaciation, perhaps 110,000 radiocarbon years before present (yr BP), and included at least two major ice advances and retreats. These glacial events took different forms in different regions. The Laurentide Ice Sheet covered much of northeastern and north-central North America, and the Cordilleran Ice Sheet covered much of northwestern North America. The two ice sheets covered more than 16 million km2 and contained one third of all the ice in the world’s glaciers during this period. The history of glaciation is not as well resolved for the Colorado Front Range region as it is for regions farther north. For instance, although a chronology of three separate ice advances has been established for the Teton Range during Pinedale times, in northern Colorado we know only that there were earlier and later Pinedale ice advances. We do not know when the earlier advance (or multiple advances) took place. However, based on geologic evidence (Madole and Shroba 1979), the early Pinedale glaciation was more extensive than the late Pinedale was.

BIONOMICS OF ENOCLERUS BARRI (COLEOPTERA: CLERIDAE)

1969 ◽  
Vol 101 (4) ◽  
pp. 382-386 ◽  
Author(s):  
Richard E. Rice
Keyword(s):  
British Columbia ◽  
Life Cycle ◽  
North America ◽  
Sex Ratio ◽  
Rocky Mountain ◽  
Mountain Region ◽  
Western North America ◽  
Adult Females ◽  
Rocky Mountain Region ◽  
Life Cycle Stages

AbstractEnoclerus barri Knull occurs in western North America from British Columbia south to Mexico and throughout the Rocky Mountain region. Adults were collected at Grass Valley, Calif., from May to September at traps baited with beetle attractants. Collections occurred at temperatures ranging from 22.5° to 31 °C; the sex ratio of trapped beetles was 4.5 females to 1 male. Duration of life cycle stages at 24 ± 2 °C were: egg, 9 days; larva, first iastar, 14 days; second instar, 12 days; third instar feeding stage, 14 days. All larvae reared to third instar failed to pupate in the laboratory. Adult females of unknown age when collected lived from 10 to 131 days and produced an average of 389 eggs per female. Enoclerus barri utilized six species of Scolytidae as hosts in the laboratory.

scholarly journals II.—Restoration of Elotherium

1894 ◽  
Vol 1 (7) ◽  
pp. 294-295
Author(s):  
O. C. Marsh
Keyword(s):  
North America ◽  
Atlantic Coast ◽  
Rocky Mountain ◽  
Mountain Region ◽  
Number Of Species ◽  
Large Size ◽  
Rocky Mountain Region

The genus Elotherium, established by Pomelin1847, represents a family of extinct mammals, all of much interest. They were first foundinEurope, but now are known in the Miocene of North America, not only on the Atlantic coast, but especially in the Rocky Mountain region, and still further west. This family includes several genera, or subgenera, and quite a number of species, some of which contain individuals of large size, only surpassed in bulk among their contemporaries by members of the Rhinoceros family, and of the huge Brontotherid

Intraspecific Phylogeography of Red Squirrels (Tamiasciurus hudsonicus) in the Central Rocky Mountain Region of North America

Genetica ◽  
2005 ◽  
Vol 125 (2-3) ◽  
pp. 141-154 ◽  
Author(s):  
Gregory M. Wilson ◽  
Ronald A. Den Bussche ◽  
Karen McBee ◽  
Lacrecia A. Johnson ◽  
Cheri A. Jones
Keyword(s):  
North America ◽  
Rocky Mountain ◽  
Mountain Region ◽  
Tamiasciurus Hudsonicus ◽  
Red Squirrels ◽  
Rocky Mountain Region ◽  
Intraspecific Phylogeography

Options for the management of white pine blister rust in the Rocky Mountain Region

2008 ◽  
Author(s):  
Kelly S. Burns ◽  
Anna W. Schoettle ◽  
William R. Jacobi ◽  
Mary F. Mahalovich
Keyword(s):  
Rocky Mountain ◽  
Mountain Region ◽  
White Pine Blister Rust ◽  
White Pine ◽  
Blister Rust ◽  
Rocky Mountain Region
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