Postglacial paleoecology and successional relationships of a bog woodland near Prince Rupert, British Columbia

1983 ◽  
Vol 13 (5) ◽  
pp. 938-947 ◽  
Author(s):  
A. Banner ◽  
J. Pojar ◽  
G. E. Rouse
Keyword(s):  
British Columbia ◽  
North Coast ◽  
Organic Soils ◽  
Site Factors ◽  
Southeast Alaska ◽  
The North ◽  
Drainage Patterns ◽  
Mineral Soils ◽  
Scrub Forest ◽  
Alluvial Forest

The historical development of a bog woodland on the north coast of British Columbia is reconstructed using pollen analysis, peat stratigraphy, and 14C dating. The succession spans 8700 ± 210 years in the following sequence: Pinuscontorta Dougl. – Alnusrubra Bong. – ferns/pioneer alluvial forest; Piceasitchensis (Bong.) Carr. – Alnus – Tsugaheterophylla (Raf.) Sarg. – (Thujaplicata) Donn. – Lysichitonamericanum Hulten & St. John – ferns/moist productive alluvial forest on regosols; Thuja – Chamaecyparisnootkatensis (D. Don) Spach – Tsuga – Pinus/scrub forest on peaty mineral soils; Pinus – Chamaecyparis – ericaceous shrubs – Sphagnum L. spp./bog woodland on organic soils. This ecosystem sequence is correlated with changes in paleoclimate reported for southwestern British Columbia and may also be associated with edaphic factors such as changing drainage patterns, the formation of cemented soil horizons, and the accumulation of thick organic surface horizons. The succession from forest to muskeg is contrasted with other evidence for succession from muskeg to forest in north-coastal British Columbia and southeast Alaska. We interpret the regional vegetation and soils as a dynamic complex of ecosystems linked successionally through climatically sensitive pathways. Local site factors such as topography, landform, drainage, and nutrient regime are important secondary factors controlling the direction of succession.

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.

An assessment of phosphorus limitations to soil nitrogen availability across forest ecosystems of north coastal British Columbia

2005 ◽  
Vol 35 (3) ◽  
pp. 530-540 ◽  
Author(s):  
J M Kranabetter ◽  
A Banner ◽  
A de Groot
Keyword(s):  
British Columbia ◽  
Forest Ecosystems ◽  
N Cycling ◽  
Thuja Plicata ◽  
North Coast ◽  
Available Phosphorus ◽  
P Availability ◽  
Inorganic N ◽  
Mineral Soils ◽  
Forest Floors

The wet, slow-growing forests of western redcedar (Thuja plicata Donn ex D. Don) and salal (Gaultheria shallon Pursh) on the north coast of British Columbia are characteristically low in available phosphorus (P) compared with more productive forest ecosystems. It has been suggested that declining P availability can eventually limit soil biological activity and restrict nitrogen (N) cycling. We investigated this potential link between P availability and N cycling for three forest types (cedar–salal, hemlock – lanky moss and spruce – sword fern) covering a wide gradient in site productivity. Forest floors (upper 20 cm) and mineral soils (20 cm depth) were collected from five replicate sites of each forest type and incubated for 20 weeks at field moisture content with and without an amendment of NaH2PO4. We found that organic P concentrations of both forest floors and mineral soils were positively correlated to extractable inorganic N concentrations (unamended soils over 20 weeks). The addition of P to the low-productivity cedar–salal soils led to significant increases in extractable inorganic N in the forest floors and mineral soils. P amendments led to either a smaller or nonsignificant increase in extractable N for moderately and highly productive soils. Soil respiration of CO2 and respiration quotients were substantially reduced in forest floors with a P amendment, suggesting N mineralization was governed by exoenzyme allocation rather than decomposition rates. These results demonstrate a possible enhancement in N supplies with an application of P to low-productivity cedar–salal forests.

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
Sign in / Sign up

Export Citation Format

Share Document