scholarly journals Georgia Basin Project: Structural Evolution of parts of southern Insular and southwestern Coast Belts, British Columbia

1991 ◽  
Author(s):  
J W H Monger
Keyword(s):  
British Columbia ◽  
Structural Evolution ◽  
Georgia Basin

scholarly journals Measuring nitrogen and sulphur deposition in the Georgia Basin, British Columbia, using lichens and moss

2010 ◽  
Vol 69 (1s) ◽  
pp. 22 ◽  
Author(s):  
Beverley A. RAYMOND† ◽  
Tasha BASSINGTHWAIGHTE ◽  
Patrick D. SHAW
Keyword(s):  
British Columbia ◽  
Sulphur Deposition ◽  
Georgia Basin

Structural geology of the Lardeau Group near Trout Lake, British Columbia: implications for the structural evolution of the Kootenay Arc

1992 ◽  
Vol 29 (6) ◽  
pp. 1305-1319 ◽  
Author(s):  
Moira T. Smith ◽  
George E. Gehrels
Keyword(s):  
British Columbia ◽  
Shear Zone ◽  
Structural Evolution ◽  
Strike Slip ◽  
Ductile Deformation ◽  
Lower Paleozoic ◽  
Trout Lake ◽  
Facies Metamorphism ◽  
Dextral Strike Slip ◽  
Greenschist Facies Metamorphism

The Lardeau Group is a heterogeneous assemblage of lower Paleozoic eugeoclinal strata present in the Kootenay Arc in southeastern British Columbia. It is in fault contact with lower Paleozoic miogeoclinal strata for all or some of its length along a structure termed the Lardeau shear zone. The Lardeau Group was deformed prior to mid-Mississippian time, as manifested by layer-parallel faults, folds, and evidence for early greenschist-facies metamorphism. Regional constraints indicate probable Devono-Mississippian timing of orogeny, and possible juxtaposition of the Lardeau Group over miogeoclinal strata along the Lardeau shear zone at this time. Further ductile deformation during the Middle Jurassic Columbian orogeny produced large folds with subhorizontal axes, northwest-striking foliation and faults, and orogen-parallel stretching lineations. This deformation was apparently not everywhere synchronous, and may have continued through Late Jurassic time northeast of Trout Lake. This was followed by Cretaceous(?) dextral strike-slip and normal movement on the Lardeau shear zone and other parallel faults. While apparently the locus of several episodes of faulting, the Lardeau shear zone does not record the accretion of far-travelled tectonic fragments, as sedimentological evidence ties the Lardeau Group and other outboard units to the craton.

scholarly journals Hydrologic and Climatic Zonation of Georgia Basin, British Columbia

2001 ◽  
Vol 26 (1) ◽  
pp. 43-70 ◽  
Author(s):  
Norman L. Wade ◽  
Jillian Martin ◽  
Paul H. Whitfield
Keyword(s):  
British Columbia ◽  
Georgia Basin

scholarly journals Modelling and mapping critical loads and exceedances for the Georgia Basin, British Columbia, using a zero base-cation depletion criterion

2010 ◽  
Vol 69 (1s) ◽  
pp. 181 ◽  
Author(s):  
Mina NASR ◽  
Mark CASTONGUAY ◽  
Jae OGILVIE ◽  
Beverley A. RAYMOND† ◽  
Paul A. ARP
Keyword(s):  
British Columbia ◽  
Critical Loads ◽  
Base Cation ◽  
Georgia Basin ◽  
Base Cation Depletion

Demography of Sooty Fox Sparrows (Passerella unalaschcensis) following a shift from a migratory to resident life history

2018 ◽  
Vol 96 (5) ◽  
pp. 436-440 ◽  
Author(s):  
Hannah Visty ◽  
Scott Wilson ◽  
Ryan Germain ◽  
Jessica Krippel ◽  
Peter Arcese
Keyword(s):  
British Columbia ◽  
Life History ◽  
Population Growth ◽  
Vital Rates ◽  
Population Growth Rates ◽  
Probability Of Survival ◽  
Georgia Basin ◽  
Passerella Iliaca ◽  
Resident Populations ◽  
Established Population

Identifying causes and consequences of variation in species life history has the potential to improve predictions about how climate and land-use change may affect the demography and distribution of species in future. Sooty Fox Sparrows (Passerella unalaschcensis (J.F. Gmelin, 1789); or commonly grouped within the Fox Sparrow, Passerella iliaca (Merrem, 1786)) were migrants that rarely bred in the Georgia Basin of British Columbia prior to ∼1950 but have since established resident populations. Data on 270 color-banded birds and 54 nests on Mandarte Island, British Columbia, allowed us to estimate demographic vital rates and population growth in one recently established population. Annual fecundity (F), estimated as the product of the number of broods initiated (1.5 ± 0.01; mean ± SD), clutch size (2.82 ± 0.44), and probability of survival to fledging (0.68 ± 0.02), exceeded values reported for migrants, supporting the hypothesis that residents invest more in reproduction, on average, than migrants within species. Estimating juvenile and adult overwinter survival (Sj = 0.32 ± 0.06 and Sa = 0.69 ± 0.05) next allowed us to simulate an expected distribution of population growth rates as λexp = Sa + (Sj × F), given parameter error. Our estimate of λexp (1.61 ± 0.57) implies expeditious population growth, consistent with the species’ recent colonization of the region.

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