scholarly journals In Situ Cultured Bacterial Diversity from Iron Curtain Cave, Chilliwack, British Columbia, Canada

Diversity ◽  
2017 ◽  
Vol 9 (3) ◽  
pp. 36 ◽  
Author(s):  
Soumya Ghosh ◽  
Elise Paine ◽  
Rob Wall ◽  
Gabrielle Kam ◽  
Tanna Lauriente ◽  
...  
Keyword(s):  
British Columbia ◽  
Bacterial Diversity ◽  
Iron Curtain

scholarly journals Prescribing practices of endocrine therapy for ductal carcinoma in situ in British Columbia

2018 ◽  
Vol 25 (2) ◽  
pp. 133 ◽  
Author(s):  
A.T. Chaudhry ◽  
T.A. Koulis ◽  
C. Speers ◽  
R.A. Olson
Keyword(s):  
British Columbia ◽  
Endocrine Therapy ◽  
Ductal Carcinoma In Situ ◽  
Carcinoma In Situ ◽  
Ductal Carcinoma ◽  
Population Based ◽  
Cox Regression Analysis ◽  
Treatment Centre ◽  
Er Status

Purpose The mainstay of treatment for ductal carcinoma in situ (dcis) involves surgery in the form of mastectomy or lumpectomy. Inconsistency in the use of endocrine therapy (et) for dcis is evident worldwide. We sought to assess the variation in et prescribing for patients with dcis across a population-based radiotherapy (rt) program and to identify variables that predict its use.Methods Data from a breast cancer database were obtained for women diagnosed with dcis in British Columbia from 2009 to 2014. Associations between et use and patient characteristics were assessed by chi-square test and multilevel multivariate logistic regression. The Kaplan–Meier method, with propensity score matching and Cox regression analysis, was used to assess the effects of et on overall survival (os) and relapse-free survival (rfs).Results For the 2336 dcis patients included in the study, et use was 13% in dcis patients overall, and 17% in patients with estrogen receptor–positive (er+) tumours treated with breast-conserving surgery and rt. Significant variation in et use by treatment centre was observed (range: 8%–23%; p < 0.001), and prescription of et by individual oncologists varied in the range 0%–40%. After controlling for confounding factors, age less than 50 years [odds ratio (or): 1.72; p = 0.01], treatment centre, er+ status (or: 5.33; p < 0.001), and rt use (or: 1.77; p < 0.001) were significant predictors of et use. No difference in os or rfs with the use of et was observed.Conclusions In this population-based analysis, 13% of patients with dcis in British Columbia received et, with variation by treatment centre (8%–23%) and individual oncologist (0%–40%). Age less than 50 years, er+ status, and rt use were most associated with et use.

scholarly journals Tracking Mangrove Oil Bioremediation Approaches and Bacterial Diversity at Different Depths in an in situ Mesocosms System

2019 ◽  
Vol 10 ◽  
Author(s):  
Laís Feitosa Machado ◽  
Deborah Catharine de Assis Leite ◽  
Caio Tavora Coelho da Costa Rachid ◽  
Jorge Eduardo Paes ◽  
Edir Ferreira Martins ◽  
...  
Keyword(s):  
Bacterial Diversity ◽  
Different Depths

The Sisters Creek Formation: Pleistocene sediments representing a nonglacial interval in southwestern British Columbia at about 18 ka

1995 ◽  
Vol 32 (6) ◽  
pp. 758-767 ◽  
Author(s):  
Stephen R. Hicock ◽  
Olav B. Lian
Keyword(s):  
British Columbia ◽  
Glacial Maximum ◽  
Time Space ◽  
Late Wisconsinan ◽  
Sand And Gravel ◽  
New Time

Sisters Creek Formation is formally defined, stratotypes are established for it, and the time–space chart is updated for the Fraser Lowland, southwestern British Columbia. The Sisters Creek is a Pleistocene formation comprising in situ and reworked organic-rich sediments, and nonorganic silt, sand, and gravel. The formation was deposited during the Port Moody interstade (within the Late Wisconsinan Fraser Glaciation; δ18O stage 2) between the Coquitlam stade (early Fraser Glaciation) and the main Vashon stadial maximum that occurred about 14.5 ka. The Sisters Creek Formation represents a glacial recession in southwestern British Columbia that generally coincided with the timing of the last global glacial maximum. The new time–space chart implies that, in Fraser Lowland, the Fraser Glaciation represents the rapid advances and retreats of glacial lobes issuing from surrounding mountains, which remained ice-covered during interstades.

Aspects of Histology in Macoma Carlottensis (Bivalvia: Tellinidae) and In Situ Histopathology Related to Mine-Tailings Discharge

1989 ◽  
Vol 69 (2) ◽  
pp. 447-464 ◽  
Author(s):  
Doug A. Bright ◽  
Derek V. Ellis
Keyword(s):  
British Columbia ◽  
Coastal Waters ◽  
Mine Tailings ◽  
Western United States ◽  
Left Valve ◽  
Sediment Particle ◽  
Surface Deposit ◽  
Sediment Particle Size ◽  
Current Exposure

Macoma carlottensis Whiteaves, 1880 is abundant (up to approximately 350 nr2) in subtidal infaunal communities on the continental shelf of western United States (Lie & Kelly, 1970; Word, 1979) and in British Columbia fjords (Ellis, 1969). Of thirteen different species of Macoma identified from the coastal waters of southern British Columbia, M. carlottensis is the most tolerant to variations in water depth, sediment particle size, current exposure, and salinity (Dunnill & Ellis, 1969). Observations of the species maintained in sediment trays in our laboratory suggest thatM. carlottensis is an infaunal, primarily sub-surface deposit feeder which generally lies at a depth of 1-4 cm with its left valve downwards. Filter feeding was observed in some instances as indicated by extension of the siphons from 0-5-3 cm above the substrate.

scholarly journals Dendroglaciological Dating of a Little Ice Age Glacial Advance at Moving Glacier, Vancouver Island, British Columbia

2007 ◽  
Vol 50 (1) ◽  
pp. 47-55 ◽  
Author(s):  
Daniel J. Smith ◽  
Colin P. Laroque
Keyword(s):  
British Columbia ◽  
Little Ice Age ◽  
Vancouver Island ◽  
Ice Age ◽  
Subalpine Forest ◽  
Terminal Moraine ◽  
Glacier Advance ◽  
Glacial Advance

ABSTRACT Dendrochronological investigations at Moving Glacier provide the first calendar-dating of a Little Ice Age glacier advance on Vancouver Island. In 1931, Moving Glacier was within 30 to 50 m of a distinct trimline and terminal moraine marking its maximum Little Ice Age extent. A reconnaissance of the site in 1993 revealed the presence of sheared in situ stumps and detrital trunks inside the 1931 ice limit. Sampling in 1994 showed the site was covered by a mature subalpine forest prior to the glacial advance which overrode the site after 1718 A.D. Following this period of expansion, which saw Moving Glacier expand to its maximum Little Ice Age position after 1818 A.D., the glacier apparently experienced only minimal retreat prior to first being photographed in 1931.

scholarly journals In-situ Effects of Eutrophication and Overfishing on Physiology and Bacterial Diversity of the Red Sea Coral Acropora hemprichii

PLoS ONE ◽  
2013 ◽  
Vol 8 (4) ◽  
pp. e62091 ◽  
Author(s):  
Christian Jessen ◽  
Javier Felipe Villa Lizcano ◽  
Till Bayer ◽  
Cornelia Roder ◽  
Manuel Aranda ◽  
...  
Keyword(s):  
Bacterial Diversity ◽  
Red Sea

scholarly journals Regional influence of ocean-climate teleconnections on the timingand duration of MODIS derived snow cover in British Columbia, Canada

2019 ◽  
Author(s):  
Alexandre R. Bevington ◽  
Hunter E. Gleason ◽  
Vanessa N. Foord ◽  
William C. Floyd ◽  
Hardy P. Griesbauer
Keyword(s):  
British Columbia ◽  
Snow Cover ◽  
Snow Water Equivalent ◽  
Regional Analysis ◽  
Calibration Data ◽  
Validation Data ◽  
Regional Patterns ◽  
Ocean Climate ◽  
Regional Influence

Abstract. We use the twice daily Moderate Resolution Imaging Spectro–Radiometer (MODIS) snow cover product to study the regional influence of the Oceanic Niño Index (ONI) and Pacific Decadal Oscillation (PDO) on snow cover in British Columbia (BC). We apply a locally weighted regression (LOWESS) interpolation to the MODIS normalized difference snow index (NDSI) time series to detect the timing and duration of snow. We confirm the general consensus from many previous in situ studies that both ONI and PDO have significant impacts on snow cover in BC. We add to this knowledge by performing seasonal and regional analysis using established hydrozones, and explore variation in our results by elevation bins of 500 m. We calibrated our method with in situ snow water equivalent (SWE) data, and found an optimal NDSI threshold of 30 for detecting continuous snow cover.We separate automatic snow weather station data into calibration (75 %) and validation (25 %) subsets and obtain mean absolute errors between the MODIS and in situ observations for the start, end and duration of 8.7, 8.9 and 13.1 days for the calibration data, and 12.7, 12.6 and 16.6 for the validation data, respectively. In general, the start date of snow is poorly correlated with both ONI and PDO, whereas end date and duration are strongly negatively correlated. Regional patterns emerge where northern and southern BC are most correlated to the PDO and the ONI, respectively. These relationships are generally stronger at lower elevations, and vary spatially. This study demonstrates that the suitability of ocean-climate teleconnections as predictors of the timing and duration of snow varies throughout BC.

scholarly journals Interrelationships between MODIS/Terra remotely sensed snow cover and the hydrometeorology of the Quesnel River Basin, British Columbia, Canada

2009 ◽  
Vol 13 (8) ◽  
pp. 1439-1452 ◽  
Author(s):  
J. Tong ◽  
S. J. Déry ◽  
P. L. Jackson
Keyword(s):  
British Columbia ◽  
Snow Cover ◽  
Correlation Coefficient ◽  
River Basin ◽  
Time Lag ◽  
Spatial Filter ◽  
In Situ Observation ◽  
Cloud Coverage ◽  
Snow Cover Extent

Abstract. A spatial filter (SF) method is adopted to reduce the cloud coverage from the Moderate Resolution Imaging Spectroradiometer (MODIS) 8-day snow products (MOD10A2) between 2000–2007 in the Quesnel River Basin (QRB) of British Columbia, Canada. A threshold of k = 2 cm of snow depth measurements at four in-situ observation stations in the QRB are used to evaluate the accuracy of MODIS snow products MOD10A1, MOD10A2, and SF. Using the MOD10A2 and the SF, the relationships between snow ablation, snow cover extent (SCE), snow cover fraction (SCF), streamflow and climate variability are assessed. Based on our results we are able to draw several interesting conclusions. Firstly, the SF method reduces the average cloud coverage in the QRB from 15% for MOD10A2 to 9%. Secondly, the SF increases the overall accuracy (OA) based on the threshold k = 2 cm by about 2% compared to MOD10A2 and by about 10% compared to MOD10A1 at higher elevations. The OA for the four in-situ stations decreases with elevation with 93.1%, 87.9%, 84.0%, and 76.5% at 777 m, 1265 m, 1460 m, and 1670 m, respectively. Thirdly, an aggregated 1°C rise in average air temperature during spring leads to a 10-day advance in reaching 50% SCF (SCF50%) in the QRB. The correlation coefficient between normalized SCE of the SF and normalized streamflow is −0.84 (p<0.001) for snow ablation seasons. There is a 32-day time lag for snow ablation to impact the streamflow the strongest at the basin outlet. The linear correlation coefficient between SCF50% and 50% normalized accumulated runoff (R50%) attains 0.82 (p<0.01). This clearly demonstrates the strong links that exist between the SCF depletion and the hydrology of this sub-boreal, mountainous watershed.

Amphibole in a spinel lherzolite xenolith: evidence for volatiles and partial melting in the upper mantle beneath southern British Columbia

1984 ◽  
Vol 21 (9) ◽  
pp. 1067-1072 ◽  
Author(s):  
Mark Brearley ◽  
Christopher M. Scarfe
Keyword(s):  
British Columbia ◽  
Partial Melting ◽  
Upper Mantle ◽  
Stability Field ◽  
Spinel Lherzolite ◽  
Ultramafic Xenolith ◽  
Metasomatic Fluid ◽  
Small Grains ◽  
First Time

Pargasitic amphibole has been observed for the first time in an ultramafic xenolith from British Columbia. The xenolith is a chrome diopside-bearing spinel lherzolite trapped within an alkali basaltic lava flow at Lightning Peak, near Vernon, British Columbia. Amphibole (<5%) occurs within the xenolith as small grains, interstitial between other xenolith mineral phases, and always shows evidence of melting. Microprobe analyses of the amphibole reveal that it is a pargasite rich in MgO (MgO = 17.1–17.7 wt.%; Mg/(Mg + Fe2+) = 0.89) and CaO (10.4–10.7 wt.%). Textural and chemical evidence suggests that the pargasite is in equilibrium with the other phases in spinel lherzolite. The pargasite probably crystallized within the spinel stability field of the upper mantle from a volatile-rich metasomatic fluid that was produced by dehydration of subducted material. Melting in the amphibole may have been caused by one of three processes: superheating by the host alkali basalt, decompression as the magma ascended, or by in situ partial melting within the upper mantle. The partial melting of amphibole-bearing spinel lherzolite provides a possible mechanism for the generation of late Cenozoic alkalic magmas of the Intermontane Belt of British Columbia.

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