Middle Ordovician Stratigraphic and Faunal Study, southern Alberta and Southeast British Columbia

1963 ◽  
Author(s):  
B S Norford
Keyword(s):  
British Columbia ◽  
Middle Ordovician ◽  
Southern Alberta

Provenance of Paleozoic sedimentary rocks in the Canadian Cordilleran miogeocline: a Nd isotopic study

1997 ◽  
Vol 34 (12) ◽  
pp. 1603-1618 ◽  
Author(s):  
Carmala N. Garzione ◽  
P. Jonathan Patchett ◽  
Gerald M. Ross ◽  
JoAnne Nelson
Keyword(s):  
British Columbia ◽  
Northwest Territories ◽  
Middle Devonian ◽  
Volcanic Rocks ◽  
Sedimentary Rocks ◽  
Canadian Shield ◽  
Isotopic Study ◽  
Middle Ordovician ◽  
Southern Alberta ◽  
T Values

Nd isotopes and trace elements in sedimentary rocks of the Yukon, the Northwest Territories, and northern British Columbia are used to examine the source of sediments in the Canadian Cordilleran miogeocline. Previous Nd isotope studies in southern Alberta demonstrated that strata of Neoproterozoic to Late Ordovician age were derived from Archean and Proterozoic Canadian Shield sources, whereas by the Late Devonian, a shift of 6 εNd units to younger crustal sources (εNd (T) = −6 to −9) had occurred. In this study, we found that the shift to younger crustal Nd isotopic signatures in the Yukon and Northwest Territories occurred much earlier than in southern Alberta. Cambrian and older strata have εNd(T) values of −10.0 to −21.1, consistent with derivation from Canadian Shield sources. Lower Ordovician through Permian strata in the Yukon and Northwest Territories, including the Innuitian-derived Imperial Assemblage, have εNd(T) values of −5 to −11.4. In northern British Columbia, the shift to a younger source reflects a wider range of εNd(T) values, from -−8.7 to −14.6 in Middle Ordovician through Middle Devonian strata, suggesting continued input from Canadian Shield sources. By the Middle Devonian, a complete shift to younger crustal signatures (εNd(T) = −5.9 to −10.5) had occurred in northern British Columbia. Several sources for the more juvenile sediments include (1) a mixture of locally erupted volcanic rocks with Canadian Shield sources, (2) a Grenville source, and (3) an Innuitian source. We propose that Ordovician to Lower Devonian strata were derived from a mixture of locally erupted, juvenile volcanics and pre-Cambrian Canadian Shield sources, and post-Middle Devonian strata were sourced from the Innuitian orogen in the Canadian Arctic.

Impact of cultivars and herbicides on weed management in alfalfa

2006 ◽  
Vol 86 (3) ◽  
pp. 875-885 ◽  
Author(s):  
J. R. Moyer ◽  
S. N. Acharya
Keyword(s):  
British Columbia ◽  
Weed Control ◽  
Weed Management ◽  
Forage Quality ◽  
Western Canada ◽  
Downy Brome ◽  
Weed Species ◽  
Standard Type ◽  
Southern Alberta ◽  
Medicago Sativa L

Weeds, especially dandelion (Taraxacum officinale Weber in F.H. Wigg.), tend to infest a forage alfalfa (Medicago sativa L.) stand 2 to 4 yr after establishment. To develop better weed management systems, experiments were conducted at Lethbridge, Alberta, from 1995 to 2002 and Creston, British Columbia, from 1998 to 2001, which included the alfalfa cultivars Beaver (standard type) and AC Blue J (Flemish type) and annual applications of metribuzin and hexazinone. These herbicides are registered for weed control in irrigated alfalfa in Alberta and alfalfa grown for seed. In addition, two sulfonylurea herbicides, metsulfuron and sulfosulfuron, and glyphosate were included. All of the herbicides except glyphosate controlled or suppressed dandelion and mustard family weeds. Metsulfuron at 5 g a.i. ha-1 almost completely controlled dandelion at both locations. However, after metsulfuron application at Lethbridge, dandelion was replaced with an infestation of downy brome, which is unpalatable for cattle. None of the herbicides increased total forage (alfalfa + weed) yield, and in some instances herbicides reduced forage quality by causing a shift from a palatable to an unpalatable weed species. However, it was observed that AC Blue J consistently yielded more than Beaver, and weed biomass was consistently less in the higher-yielding cultivar. AC Blue J was developed primarily for the irrigated area in southern Alberta and for southern British Columbia. Therefore, additional experiments should be conducted to determine which alfalfa cultivars have the greatest ability to compete with weeds in other regions of western Canada. Key words: Alfalfa yield, dandelion, forage quality, weed control

Detection of genetic diversity in rough fescue (Festuca campestris Rydb) populations of southern Alberta and British Columbia, Canada, using RAPD markers

2008 ◽  
Vol 88 (2) ◽  
pp. 307-312
Author(s):  
Zhao Mengli ◽  
Han Bing ◽  
Walter D Willms
Keyword(s):  
Genetic Diversity ◽  
British Columbia ◽  
Genetic Distance ◽  
Random Amplified Polymorphic Dna ◽  
Geographic Distance ◽  
Genetic Distances ◽  
Gene Frequencies ◽  
Southern Alberta ◽  
Potential Adaptation ◽  
Rough Fescue

Mountain rough fescue (Festuca campestris Rydb.) is a tufted native grass in southern Alberta and British Columbia, Canada, and has attracted interest for use in reclamation. However, its seed is often available from only a few localized sources and may not be adapted for areas removed from the collection site. We conducted a study to determine the genetic variability among rough fescue populations to assess its potential adaptation. Thirty plants were collected from each of six populations and analyzed using Random Amplified Polymorphic DNA (RAPD). One population (Kamloops, BC) was separated by several mountain ranges from the five easterly Alberta populations.The Kamloops population was also separated from the Alberta populations by genetic distance in two clusters. Of the total genetic variation present in the data, 21% was found among populations while the remaining (79%) was found within populations. Nei’s genetic distances among populations were related to their geographical distances. Genetic differences among populations appeared to be caused primarily by differences in gene frequencies rather than rare genes. Also, genetic diversity appeared to increase from west to east suggesting that the more easterly populations had greater adaptation potential. We speculate that the more easterly populations are less likely to share genes since the prevailing winds are from the west. Germplasm from the more easterly populations may be used with suitable precautions within Alberta and possibly around Kamloops. Key words: Genetic distance, geographic distance, reclamation, potential adaptation

Stratigraphically significant Early and Middle Ordovician gastropod occurrences, western and northwestern Canada

1995 ◽  
Vol 69 (6) ◽  
pp. 1047-1053 ◽  
Author(s):  
David M. Rohr ◽  
B. S. Norford ◽  
Ellis L. Yochelson
Keyword(s):  
British Columbia ◽  
Age Determination ◽  
Yukon Territory ◽  
Middle Ordovician

Several biostratigraphically important gastropod genera are described from Alberta, British Columbia, Yukon Territory, and the District of Mackenzie. Malayaspira is present in the mid-Ibexian Kechika Group. Palliseria, Maclurites, Teiichispira, Malayaspira, Barnesella, and Ceratopea occur in the Skoki Formation (highest Ibexian and lower Whiterockian) and Helicotoma and Palliseria in the Sunblood Formation (lower Whiterockian). The largest known Teiichispira operculum is illustrated. The forms are particularly useful for age determination within relatively narrow limits and most of the taxa are readily identified in the field.

An allostratigraphic correlation of Lower Colorado Group (Albian) and equivalent strata in Alberta and British Columbia, and Cenomanian rocks of the Upper Colorado Group in southern Alberta

2008 ◽  
Vol 56 (4) ◽  
pp. 259-299 ◽  
Author(s):  
X. Roca ◽  
J. R. Rylaarsdam ◽  
H. Zhang ◽  
B. L. Varban ◽  
C. F. Sisulak ◽  
...  
Keyword(s):  
British Columbia ◽  
Southern Alberta ◽  
Colorado Group

BARRIER ALFALFA

1987 ◽  
Vol 67 (3) ◽  
pp. 827-830 ◽  
Author(s):  
M. R. HANNA ◽  
H. C. HUANG
Keyword(s):  
British Columbia ◽  
Medicago Sativa ◽  
Verticillium Wilt ◽  
Bacterial Wilt ◽  
Wilt Disease ◽  
Good Resistance ◽  
Southern Alberta ◽  
Cultivar Description ◽  
Medicago Sativa L

Barrier is the first Canadian cultivar of alfalfa (Medicago sativa L.) developed with resistance to verticillium wilt disease. It also has very good resistance to bacterial wilt. Barrier is adapted to the irrigated areas in Southern Alberta and British Columbia where these diseases are prevalent.Key words: Medicago sativa L., alfalfa, cultivar description, verticillium wilt, bacterial wilt

Microctonus melanopus (Ruthe) (Hymenoptera: Braconidae), a Parasitoid of Adult Cabbage Seedpod Weevil (Coleoptera: Curculionidae): Distribution in Southern Alberta and Female Diagnosis

2004 ◽  
Vol 39 (3) ◽  
pp. 350-361 ◽  
Author(s):  
Andrew S. Fox ◽  
Scott R. Shaw ◽  
Lloyd M. Dosdall ◽  
Byron Lee
Keyword(s):  
British Columbia ◽  
North America ◽  
Oilseed Crop ◽  
Brassica Napus L ◽  
Canadian Prairies ◽  
Ceutorhynchus Obstrictus ◽  
Southern Alberta ◽  
Cabbage Seedpod Weevil ◽  
Substantial Control ◽  
North America North

Microctonus melanopus (Ruthe) were reared and dissected from adult cabbage seedpod weevil, Ceutorhynchus obstrictus (Marsham), collected in southern Alberta in 2000 and 2001, and M. melanopus females were collected near Creston, British Columbia in 2001. These collections represent the first records for this European species in Canada. Previously published records of M. melanopus in North America are from the northwestern United States. A first diagnosis for adult female M. melanopus is provided that places M. melanopus in Loan's (1969) key for Microctonus species of North America, north of Mexico. Scanning electron photomicrographs of female morphology are provided to illustrate important diagnostic characters: the mesonotal sculpture with a distinct median longitudinal carina posteriorly, and the sculpture of metasomal tergite 1 with costae distinctly converging posteriorly. It is probable that M. melanopus has long been established in the southern interior of British Columbia because its host, C. obstrictus, has occurred there for many years. The occurrence of M. melanopus in southern Alberta is likely more recent, as its host only recently dispersed to that region. Rates of parasitism of C. obstrictus by M. melanopus, with one exception, were low in southern Alberta (<10%), and only one parasitized weevil was found on spring-seeded Brassica napus L., the primary brassicaceous oilseed crop associated with the weevil on the Canadian prairies. We hypothesize that M. melanopus will not provide substantial control of C. obstrictus in the mixed grassland ecoregion of its new range.

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