Some geographic variations in Picea sitchensis and their ecologic interpretation

1968 ◽  
Vol 46 (6) ◽  
pp. 787-798 ◽  
Author(s):  
R. Daubenmire
Keyword(s):  
British Columbia ◽  
Picea Sitchensis ◽  
Species Range ◽  
Northern California ◽  
Geographic Variations ◽  
History Of ◽  
Length Width ◽  
Skeena River ◽  
Data Collections ◽  
Insular Populations

Mass collections of Picea sitchensis, and hybrids, extending from Haines, Alaska, to northern California have been studied with respect to morphology of the ovuliferous cones, twigs, and needles. The Pleistocene history of the species has been reviewed. A north–south gradient occurs in size of cone, length–width ratios of cone scales, sterigma angle, and phyllotaxy. The gradient is probably clinal and appears unaffected by the northerly three-fourths of the species range being in glaciated territory where Pleistocene survival, on nunataks, is suggested by the data. Collections along two sections of the Skeena River in British Columbia are interpreted as hybrid P. sitchensis × P. glauca populations backcrossed with the nearest one of the two parents, i.e., with P. sitchensis near the coast and P. glauca farther inland. Insular populations tend to show less variability in length–width ratios of the ovuliferous scales than do mainland populations.

scholarly journals Neoglacial history of Robson Glacier, British Columbia

2017 ◽  
Vol 54 (11) ◽  
pp. 1153-1164 ◽  
Author(s):  
B.H. Luckman ◽  
M.H. Masiokas ◽  
K. Nicolussi
Keyword(s):  
British Columbia ◽  
Little Ice Age ◽  
Ice Age ◽  
Tree Line ◽  
Canadian Rockies ◽  
The Holocene ◽  
Forest Sites ◽  
History Of ◽  
Subfossil Wood ◽  
Glacier Advance

As glaciers in the Canadian Rockies recede, glacier forefields continue to yield subfossil wood from sites overridden by these glaciers during the Holocene. Robson Glacier in British Columbia formerly extended below tree line, and recession over the last century has progressively revealed a number of buried forest sites that are providing one of the more complete records of glacier history in the Canadian Rockies during the latter half of the Holocene. The glacier was advancing ca. 5.5 km upvalley of the Little Ice Age terminus ca. 5.26 cal ka BP, at sites ca. 2 km upvalley ca. 4.02 cal ka BP and ca. 3.55 cal ka BP, and 0.5–1 km upvalley between 1140 and 1350 A.D. There is also limited evidence based on detrital wood of an additional period of glacier advance ca. 3.24 cal ka BP. This record is more similar to glacier histories further west in British Columbia than elsewhere in the Rockies and provides the first evidence for a post-Hypsithermal glacier advance at ca. 5.26 cal ka BP in the Rockies. The utilization of the wiggle-matching approach using multiple 14C dates from sample locations determined by dendrochronological analyses enabled the recognition of 14C outliers and an increase in the precision and accuracy of the dating of glacier advances.

Patterns and history of prescription drug use among opioid-related drug overdose cases in British Columbia, Canada, 2015–2016

2019 ◽  
Vol 194 ◽  
pp. 151-158 ◽  
Author(s):  
Kate Smolina ◽  
Alexis Crabtree ◽  
Mei Chong ◽  
Bin Zhao ◽  
Mina Park ◽  
...  
Keyword(s):  
British Columbia ◽  
Drug Use ◽  
Prescription Drug ◽  
Drug Overdose ◽  
Prescription Drug Use ◽  
History Of ◽  
Related Drug

Gyrodiform gastropods from the Pacific Coast Cretaceous and Paleocene

1987 ◽  
Vol 61 (1) ◽  
pp. 70-100 ◽  
Author(s):  
W. P. Popenoe ◽  
L. R. Saul ◽  
Takeo Susuki
Keyword(s):  
British Columbia ◽  
New Taxa ◽  
Late Cretaceous ◽  
West Coast ◽  
Pacific Coast ◽  
Northern California ◽  
Color Patterns ◽  
New Subgenus ◽  
The Pacific

Seven previously described and seven new taxa of gyrodiform naticoids from West Coast Late Cretaceous–Paleocene age strata are discussed. Gyrodes (Gyrodes) dowelli White of Turonian age is a typical Gyrodes; G. robustus Waring from the Paleocene has the shape of Gyrodes s.s. but lacks the crenulations. G. greeni Murphy and Rodda, G. yolensis n. sp., G. quercus n. sp., G. banites n. sp., G. canadensis Whiteaves, G. pacificus n. sp., and G. expansus Gabb comprise the new subgenus Sohlella, which thus ranges from Cenomanian through Maastrichtian. Gyrodes robsauli n. sp. resembles “Polinices” (Hypterita) helicoides (Gray), and Hypterita is reassigned to the Gyrodinae as a subgenus of Gyrodes. Gyrodes onensis n. sp. of Albian age is similar to the G. americanus group of Sohl (1960). Three texa—Natica allisoni (Murphy and Rodda) of Cenomanian age and N. conradiana Gabb and N. conradiana vacculae n. subsp. of Turonian age—which have all been previously considered to be Gyrodes are placed in Natica. Well marked relict color patterns on N. conradiana and N. conradiana vacculae suggest that these naticids from northern California and southern British Columbia were tropical forms.Diversity of taxa and size of specimens are reduced at the end of the Turonian, suggesting a change in West Coast marine conditions at that time.

scholarly journals Immigration, Immigrants, and the Rights of Canadian Citizens in Historical Perspective. Bangarth, Stephanie D. Voices Raised in Protest: Defending Citizens of Japanese Ancestry in North America, 1942–49. Vancouver: University of British Columbia Press, 2008 Caccia, Ivana. Managing the Canadian Mosaic in Wartime: Shaping Citizenship Policy, 1939–1945. Montreal: McGill-Queen’s University Press, 2010 Champion, C.P. The Strange Demise of British Canada: The Liberals and Canadian Nationalism, 1964–68. Montreal: McGill-Queen’s University Press, 2010 Iacovetta, Franca. Gatekeepers: Reshaping Immigrant Lives in Cold War Canada. Toronto: Between the Lines, 2006 Kaprielian-Churchill, Isabel. Like Our Mountains: A History of Armenians in Canada. Montreal: McGill-Queen’s University Press, 2005 Lambertson, Ross. Repression and Resistance: Canadian Human Rights Activists, 1930–1960. Toronto: University of Toronto Press, 2005 MacLennan, Christopher. Toward the Charter: Canadians and the Demand for a National Bill of Rights, 1929–1960. Montreal: McGill-Queen’s University Press, 2004 Roy, Patricia E. The Triumph of Citizenship: The Japanese and Chinese in Canada, 1941–67. Vancouver: University of British Columbia Press, 2008

2011 ◽  
pp. 207
Author(s):  
Christopher G. Anderson
Keyword(s):  
British Columbia ◽  
Cold War ◽  
Bill Of Rights ◽  
University Of Toronto ◽  
University Of British Columbia ◽  
History Of ◽  
Canadian Nationalism ◽  
Queen's University ◽  
Japanese Ancestry ◽  
Canadian Mosaic

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.

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