scholarly journals Conservation Evaluation of Slender Collomia, Collomia tenella, in Canada

2006 ◽  
Vol 120 (2) ◽  
pp. 175
Author(s):  
George W. Douglas ◽  
Jenifer L. Penny
Keyword(s):  
United States ◽  
British Columbia ◽  
Coalbed Methane ◽  
Road Construction ◽  
Housing Development ◽  
Western United States ◽  
Single Population ◽  
Recreational Vehicles ◽  
Conservation Evaluation ◽  
Population Numbers

In Canada, Slender Collomia, Collomia tenella, is restricted to the Princeton area in southwestern British Columbia. The single population represents the northern limits of the species, which ranges from southwestern British Columbia, south in the western United States to Wyoming, Utah, Nevada and Oregon. In British Columbia, C. tenella is associated with an eroded section of a steeply sloping, southeast-facing sandy ridge. Population numbers fluctuate and in some years plants fail to appear. The major threats to C. tenella are through drilling for coalbed methane gas, sand removal for road construction, housing development and off-road recreational vehicles.

scholarly journals Conservation Evaluation of Stoloniferous Pussytoes, Antennaria flagellaris, in Canada

2006 ◽  
Vol 120 (2) ◽  
pp. 183
Author(s):  
George W. Douglas ◽  
Jenifer L. Penny ◽  
Ksenia Barton
Keyword(s):  
United States ◽  
British Columbia ◽  
Coalbed Methane ◽  
River Valley ◽  
Housing Development ◽  
Western United States ◽  
Plant Populations ◽  
Road Building ◽  
Seepage Slopes ◽  
Conservation Evaluation

In Canada, Stoloniferous Pussytoes, Antennaria flagellaris, is restricted to the Similkameen River valley south of Princeton, in south-western British Columbia. The three populations represent the northern limits of the species which ranges from southwestern British Columbia, south in the western United States to Idaho, Wyoming, Nevada and California. In British Columbia, Antennaria flagellaris is associated with eroded, unstable, calcareous clay seepage slopes on open, southerly aspects. This habitat is infrequent in the Similkameen River area and the few existing plant populations could easily be extirpated through slight changes in drainage through drilling for coalbed methane gas, road-building, or housing development.

scholarly journals Conservation Evaluation of the Pacific Population of Dwarf Woollyheads, Psilocarphus brevissimus var. brevissimus, in Canada

2006 ◽  
Vol 120 (2) ◽  
pp. 163
Author(s):  
George W. Douglas ◽  
Jenifer L. Penny ◽  
Ksenia Barton
Keyword(s):  
British Columbia ◽  
Coalbed Methane ◽  
Groundwater Levels ◽  
Gas Drilling ◽  
Pacific Population ◽  
South Central ◽  
The Pacific ◽  
Recreational Vehicles ◽  
Forest Openings ◽  
Conservation Evaluation

In Canada, Dwarf Woolly-heads, Psilocarphus brevissimus var. brevissimus, is restricted to the Similkameen River valley, south of Princeton in southwestern British Columbia and the extreme southeast and southwest corners of Alberta and Saskatchewan, respectively. This paper deals with the three British Columbia populations which represent the northwestern limit of the species which ranges from south-central British Columbia, southward in the western United States to Montana, Idaho, Washington, Oregon, Nevada, Utah, Wyoming, California and Baja California, Mexico. In British Columbia, P. brevissimus is associated with calcareous vernal pools and ephemeral pond edges in large forest openings. This habitat is rare in the area the few existing populations could easily be extirpated or degraded through slight changes in groundwater levels, coalbed methane gas drilling, housing development or recreational vehicles.

scholarly journals Conservation Evaluation of Lemmon's Holly Fern, Polystichum lemmonii, a Threatened Fern in Canada

2004 ◽  
Vol 118 (2) ◽  
pp. 164
Author(s):  
George W. Douglas
Keyword(s):  
British Columbia ◽  
Road Construction ◽  
Montane Forest ◽  
Mountain Area ◽  
Forest Road ◽  
South Central ◽  
Northern Idaho ◽  
Mining Exploration ◽  
Conservation Evaluation ◽  
Forest Road Construction

In Canada, Lemmon's Holly Fern, Polystichum lemmonii, is restricted to the Baldy Mountain area on the eastern side of the Okanagan River valley in south-central British Columbia. This population represents the northern limits of the species which ranges south through northern Idaho, Washington and Oregon to northern California. In British Columbia, P. lemmonii is associated with ultramafic rocky ridges within a montane forest at an elevation of 1900 m. The population in the Baldy Mountain area is relatively small, unprotected and potentially imperilled by mining exploration, forest road construction or wildfires.

scholarly journals A review of dinosaurian body fossils from British Columbia, Canada

2015 ◽  
Author(s):  
Iain J Reid
Keyword(s):  
United States ◽  
British Columbia ◽  
Western United States ◽  
Burgess Shale ◽  
History Of ◽  
Prairie Provinces

Since the 1900s, dinosaur fossils have been discovered from Jurassic to Cretaceous age strata, from all across the prairie provinces of Canada and the Western United States, yet little material is known from the outer provinces and territories. In British Columbia, fossils have long been uncovered from the prevalent mid-Cambrian Burgess Shale, but few deposits date from the Mesozoic, and few of these are dinosaurian. The purpose of this paper is to review the history of dinosaurian body fossils in British Columbia. The following dinosaurian groups are represented: coelurosaurians, thescelosaurids, iguanodontians, ankylosaurs and hadrosaurs.

Degrees of Intimacy

2002 ◽  
Author(s):  
David Ehrenfeld
Keyword(s):  
United States ◽  
British Columbia ◽  
Adult Male ◽  
Western United States ◽  
Horseback Riding ◽  
The Past ◽  
Garibaldi Provincial Park ◽  
Walking Stick ◽  
Provincial Park

When we arrived in Vancouver at the start of our vacation, the tabloid headline at the newspaper stand caught our attention. “World’s Bravest Mom,” it shrieked. We stopped to read. The story was simple; it needed no journalistic embellishment. Dusk, August 19, 1996. Mrs. Cindy Parolin is horseback riding with her four children in Tulameen, in southern British Columbia’s Okanagan region. Without warning, a cougar springs out of the vegetation, hurtling at the neck of one of the horses. In the confusion, Steven Parolin, age six, falls off his horse and is seized by the cougar. Mrs. Parolin, armed only with a riding crop, jumps off her horse and challenges the cougar, which drops the bleeding child and springs at her. Ordering her other children to take their wounded brother and go for help, Mrs. Parolin confronts the cougar alone. By the time rescuers reach her an hour later, she is dying. The cat, shot soon afterward, was a small one, little more than sixty pounds. Adult male cougars can weigh as much as 200 pounds, we learn the next day from the BC Environment’s pamphlet entitled “Safety Guide to Cougars.” We are on our way to Garibaldi Provincial Park, where we plan to do some hiking, and have stopped in the park head-quarters for information. “Most British Columbians live all their lives without a glimpse of a cougar, much less a confrontation with one,” says the pamphlet, noting that five people have been killed by cougars in British Columbia in the past hundred years. (Actually, the number is now higher; cougar attacks have become increasingly common in the western United States and Canada in recent years.) “Seeing a cougar should be an exciting and rewarding experience, with both you and the cougar coming away unharmed.”However, the pamphlet notes, cougars seem to be attracted to children as prey, possibly because of “their high-pitched voices, small size, and erratic movements.” When hiking, “make enough noise to prevent surprising a cougar . . . carry a sturdy walking stick to be used as a weapon if necessary,” and “keep children close-at-hand and under control.”

The Biology of Downy Brome (Bromus tectorum)

Weed Science ◽  
1984 ◽  
Vol 32 (S1) ◽  
pp. 7-12 ◽  
Author(s):  
Donald C. Thill ◽  
K. George Beck ◽  
Robert H. Callihan
Keyword(s):  
United States ◽  
British Columbia ◽  
Triticum Aestivum ◽  
Bromus Tectorum ◽  
Southeastern United States ◽  
The United States ◽  
Early Spring ◽  
Western United States ◽  
Downy Brome ◽  
Perennial Grassland

Downy brome (Bromus tectorumL. # BROTE), also known as cheatgrass, downy chess, broncograss, Mormon oats, and junegrass, was introduced into the United States from Europe, apparently during the middle of the nineteenth century (11, 21). According to Mack (23), downy brome entered British Columbia, Washington, and Utah around 1890; and by 1928 it had reached its present range, occupying much of the perennial grassland in Washington, Idaho, Oregon, Nevada, Utah, and British Columbia. Today, downy brome is a widespread weed throughout most of Canada, Mexico, and the United States, except for the southeastern United States (5, 17). Some consider downy brome to be an important forage because it provides most of the early spring grazing for livestock in western United States rangeland (21). However, it is also considered a troublesome weed in rangeland (31), winter wheat (Triticum aestivumL.) (27), several other crops (29), and noncropland (32).

Spatiotemporal patterns of observed bark beetle-caused tree mortality in British Columbia and the western United States

2012 ◽  
Vol 22 (7) ◽  
pp. 1876-1891 ◽  
Author(s):  
Arjan J. H. Meddens ◽  
Jeffrey A. Hicke ◽  
Charles A. Ferguson
Keyword(s):  
United States ◽  
British Columbia ◽  
Bark Beetle ◽  
Tree Mortality ◽  
Spatiotemporal Patterns ◽  
Western United States

SPECIES OF THE GENUS PINALITUS KELTON FOUND IN NORTH AMERICA (HETEROPTERA: MIRIDAE)

1977 ◽  
Vol 109 (12) ◽  
pp. 1549-1554 ◽  
Author(s):  
Leonard A. Kelton
Keyword(s):  
United States ◽  
British Columbia ◽  
North America ◽  
Western United States ◽  
Key To Species ◽  
European Species

AbstractOrthops rubricatus (Fallén), a European species now known to occur in North America, is transferred to the genus Pinalitus Kelton. Pinalitus solivagus (Van Duzee) is reported from British Columbia, and P. utahensis Knight and P. brevirostris Knight are considered to be synonyms of it. Pinalitus rostratus n. sp. is described from Canada and western United States. Pinalitus californicus Knight is transferred to the genus Proba Distant. A key to species is provided.

Clonal diversity within and among introduced populations of the apomictic vine Bryonia alba (Cucurbitaceae)

2000 ◽  
Vol 78 (11) ◽  
pp. 1469-1481 ◽  
Author(s):  
Stephen J Novak ◽  
Richard N Mack
Keyword(s):  
United States ◽  
Clonal Diversity ◽  
Western Montana ◽  
Western United States ◽  
Single Population ◽  
Multiple Introductions ◽  
Introduced Populations ◽  
Northern Utah ◽  
Northern Idaho ◽  
Eastern Washington

Bryonia alba L. (Cucurbitaceae) is a herbaceous Eurasian vine that predominantly reproduces clonally (asexually) through apomixis. We assessed the magnitude and distribution of clonal diversity within and among 23 recently established populations of B. alba in its new range in the western United States, based on the distribution of multilocus isozyme genotypes. Fifty-two unique clones were detected: 30 in the nine populations from eastern Washington and northern Idaho, and the remaining 22 in 14 populations from western Montana, northern Utah, and southern Idaho. On average, each population of B. alba was composed of 6.4 clones, and the proportion of distinguishable clones was 0.275. Multilocus diversity (D) was 0.632 and multilocus evenness (E) was 0.556. Twenty-six of 52 clones (50%) were restricted to a single population, and, on average, each clone occurred in 2.83 populations. Compared with other clonally reproducing plant species, this vine possesses moderate to high levels of clonal diversity in its new range in the western United States. This diversity appears to be a consequence of the events associated with its introduction (including multiple introductions), founder effects, and the proportion of sexual to apomictic reproduction within populations.Key words: invasive vine, apomixis, multilocus genotypes, clonal diversity and evenness, Bryonia alba, Cucurbitaceae.

Sign in / Sign up

Export Citation Format

Share Document