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Coast Forest Region Version 6 Provincial Biogeoclimatic Zones


Variant: CWHvh2 Coastal Western Hemlock, Central Very Wet Hypermaritime
Description:

DISTRIBUTION: The CWHvh2 occurs along the outer mainland coast from Smith Inlet in the south to the Vancouver Forest Region boundary in the north. On the Queen Charlotte Islands it occurs along the windward side of the Queen Charlotte Ranges, except for south Moresby Island where it covers much of the area, except higher elevations. The elevational limits range from sea level to approximately 500 m.

CLIMATE: The CWHvh2 is cool with very little snowfall. The proximity to the Pacific Ocean moderates temperatures. Fog, cloud, and drizzle are common throughout the year. Precipitation varies widely in this unit. It is lowest at the southern tip of the Queen Charlotte Islands and highest where air masses lift over steep mountains (e.g., 4218 mm at Tasu Sound).

VEGETATION: Forests on zonal sites are dominated by Cw, Hw, and variable amounts of Yc. Ba (not on Queen Charlotte Islands), Pl, and Ss occur in relatively minor amounts. Major understorey species include salal, Alaskan blueberry, false azalea, deer fern, Hylocomium splendens, and Rhytidiadelphus loreus, with minor amounts of fern-leaved goldthread, skunk cabbage, and Sphagnum girgensohnii. Extensive bog ecosystems occur commonly on subdued terrain. Productive forests are restricted to steeper, better drained slopes and floodplains.


Area (Ha): 3949290.56  
TEM Area (Ha): 191877.17  
% of Prov BEC w/ TEM: 4.86  
  For lists of red and blue listed communities and species in this subzone, please search within the Ministry of Environment's BC Species and Ecosystems Explorer
Further Links:
  1. Download Special Report Series 6 [Chapter 6] in PDF Format
  2. The Ecology of the Coastal Western Hemlock Zone - Brochure 31
  3. A Field Guide to Site Identification and Interpretation for the Vancouver Forest Region
  4. TEM Website