Management and productivity of cedar-hemlock-salal scrub forests on the north coast of British Columbia

2013 ◽  
Vol 308 ◽  
pp. 161-168 ◽  
Author(s):  
J.M. Kranabetter ◽  
P. LePage ◽  
A. Banner
Keyword(s):  
British Columbia ◽  
North Coast ◽  
The North ◽  
Scrub Forests

scholarly journals Evidence for Freshwater Residualism in Coho Salmon, Oncorhynchus kisutch, From a Watershed on the North Coast of British Columbia

2017 ◽  
Vol 130 (4) ◽  
pp. 336 ◽  
Author(s):  
Eric A Parkinson ◽  
Chris J Perrin ◽  
Daniel Ramos-Espinoza ◽  
Eric B Taylor
Keyword(s):  
British Columbia ◽  
Fresh Water ◽  
Coho Salmon ◽  
Pacific Salmon ◽  
Oncorhynchus Kisutch ◽  
Water Levels ◽  
North Coast ◽  
The North ◽  
Seaward Migration ◽  
Mature Fish

The Coho Salmon, Oncorhynchus kisutch, is one of seven species of Pacific salmon and trout native to northeastern Pacific Ocean watersheds. The species is typically anadromous; adults reproduce in fresh water where juveniles reside for 1–2 years before seaward migration after which the majority of growth occurs in the ocean before maturation at 2–4 years old when adults return to fresh water to spawn. Here, we report maturation of Coho Salmon in two freshwater lakes on the north coast of British Columbia apparently without their being to sea. A total of 15 mature fish (11 males and four females) were collected in two lakes across two years. The mature fish were all at least 29 cm in total length and ranged in age from three to five years old. The occurrence of Coho Salmon that have matured in fresh water without first going to sea is exceedingly rare in their natural range, especially for females. Such mature Coho Salmon may represent residual and distinct breeding populations from those in adjacent streams. Alternatively, they may result from the ephemeral restriction in the opportunity to migrate seaward owing to low water levels in the spring when Coho Salmon typically migrate to sea after 1–2 years in fresh water. Regardless of their origin, the ability to mature in fresh water without seaward migration may represent important adaptive life history plasticity in response to variable environments.

Hydrometeorological thresholds for landslide initiation and forest operation shutdowns on the north coast of British Columbia

Landslides ◽  
2006 ◽  
Vol 3 (3) ◽  
pp. 228-238 ◽  
Author(s):  
Matthias Jakob ◽  
Kris Holm ◽  
Owen Lange ◽  
James W. Schwab
Keyword(s):  
British Columbia ◽  
North Coast ◽  
The North ◽  
Forest Operation

scholarly journals Some Factors Influencing the Distribution of Pelagic Copepods in the Queen Charlotte Islands Area

1957 ◽  
Vol 14 (2) ◽  
pp. 165-202 ◽  
Author(s):  
Frances Ella Cameron
Keyword(s):  
British Columbia ◽  
Water Circulation ◽  
Copepod Species ◽  
North Coast ◽  
Queen Charlotte Islands ◽  
The North ◽  
Factors Influencing ◽  
Circulation Patterns ◽  
Pelagic Copepods

The distribution of certain copepod species of the north coast of British Columbia suggests that breeding is restricted to limited regions of well-defined temperature and salinity characteristics. Currents are responsible for the spread of juveniles and adults from these areas. Probable water circulation patterns in the vicinity of the Queen Charlotte Islands are inferred from the plankton collections.

Seasonality and Intensity of Shellfish Harvesting on the North Coast of British Columbia

2013 ◽  
Vol 8 (2) ◽  
pp. 152-169 ◽  
Author(s):  
Meghan Burchell ◽  
Nadine Hallmann ◽  
Andrew Martindale ◽  
Aubrey Cannon ◽  
Bernd R. Schöne
Keyword(s):  
British Columbia ◽  
North Coast ◽  
The North

Oceanographic connectivity among marine protected areas on the north coast of British Columbia, Canada

2005 ◽  
Vol 62 (6) ◽  
pp. 1350-1362 ◽  
Author(s):  
Clifford LK Robinson ◽  
John Morrison ◽  
Michael GG Foreman
Keyword(s):  
British Columbia ◽  
Protected Areas ◽  
Marine Protected Areas ◽  
Particle Dispersion ◽  
Marine Conservation ◽  
Ocean Current ◽  
North Coast ◽  
Late Winter ◽  
Conservation Area ◽  
The North

The main objective of our study was to use a three-dimensional oceanographic simulation model to understand connectivity among the proposed Gwaii Haanas National Marine Conservation Area (GHNMCA) and 10 other proposed or existing marine protected areas (MPAs) on the north Pacific coast of Canada. The simulations were conducted using passive particles placed at three depths and vertically migrating particles for 30 or 90 days in late winter. Simulated surface particle dispersion was found to be consistent with winter ocean current observations made from analysis of satellite imagery, current mooring, and drifter data. The GHNMCA would contribute to a network of MPAs because it supplies and receives particles from other MPAs in northern British Columbia. Model simulations also indicate that the greatest source of particles to GHNMCA originate from 30-m and not 2-m flows. Finally, the simulated mean daily dispersal rate of 2.0 km·day–1 would allow fish and invertebrates to self-seed northern portions of the GHNMCA in winter. Together, the GHNMCA and other MPAs appear to contribute a large percentage of particles to non-MPA regions in northern Hecate Strait, which may be considered a particle sink in winter.

Selected biological and chemical properties of forest floors across bedrock types on the north coast of British Columbia

2000 ◽  
Vol 30 (6) ◽  
pp. 971-981 ◽  
Author(s):  
J M Kranabetter ◽  
A Banner
Keyword(s):  
British Columbia ◽  
Forest Floor ◽  
Chemical Properties ◽  
Canopy Cover ◽  
North Coast ◽  
Available Phosphorus ◽  
Northern Coast ◽  
Turnover Rates ◽  
The North ◽  
Forest Floors

We examined some of the factors related to nutrient availability of forest floors developed over saprolitic and colluvial mineral soils of four bedrock types (granodiorite, gneissic diorite, schist, and limestone) on the outer northern coast of British Columbia. All sites were relatively well drained with old-growth coniferous forests. Forest floor morphology was quite similar across sites, with friable, moderately aggregated horizons dominating the profile. There were significant differences in concentrations of total nitrogen, available phosphorus, total sulphur, and condensed tannins across bedrock types. We found detritivores such as sowbugs, millipedes, and potworms across all sites. We could not detect differences in turnover rates (via laboratory respiration) of organic matter between bedrock types. Turnover rates instead were negatively correlated with forest floor carbon and total canopy cover. Overall, forest floor properties were quite similar across the range in parent materials because of the strong influence of climate and vegetation on soil development.

A finite element model for tides and resonance along the north coast of British Columbia

1993 ◽  
Vol 98 (C2) ◽  
pp. 2509-2531 ◽  
Author(s):  
M. G. G. Foreman ◽  
R. F. Henry ◽  
R. A. Walters ◽  
V. A. Ballantyne
Keyword(s):  
British Columbia ◽  
Finite Element ◽  
Finite Element Model ◽  
Element Model ◽  
North Coast ◽  
The North

scholarly journals Survey of intertidal ecosystem reveals a legacy of potentially toxic elements from industrial activity in the Skeena Estuary, British Columbia, Canada

2019 ◽  
Author(s):  
Tom Sizmur ◽  
Lily Campbell ◽  
Karina Dracott ◽  
Megan Jones ◽  
Nelson J. O’Driscoll ◽  
...  
Keyword(s):  
British Columbia ◽  
Industrial Development ◽  
Toxic Elements ◽  
Benthic Invertebrate ◽  
Potentially Toxic Elements ◽  
Estuarine Sediments ◽  
North Coast ◽  
The North ◽  
Intertidal Ecosystem ◽  
The Impact

AbstractRelationships between concentrations of Potentially Toxic Elements (PTEs) in estuarine sediments and their impact benthic invertebrate communities are poorly understood. We sampled and analysed PTEs in sediments and benthic invertebrates from five sites surrounding the Skeena Estuary, including sites adjacent to an abandoned cannery and a decommissioned papermill. There was no indication that sediments of the salmon cannery are polluted, but acidic sediments adjacent to the papermill contained elevated concentrations of Cd, Cr, Hg and Pb. Benthic invertebrate community assemblages confirm that sediments have recovered from prior disturbances associated with discharge of papermill sludge. Oregon pill bugs (Gnorimosphaeroma oregonensis), observed at all five sites, feed on the fibers associated with the papermill discharge. Thus, G. oregonensis are useful biomonitors for quantifying the impact of the decommissioned papermill, and similar industrial development projects, on intertidal ecosystems along the north coast of British Columbia, Canada.

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