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Coast Forest Region Version 6 Provincial Biogeoclimatic Zones


Variant: CWHmm2 Coastal Western Hemlock, Montane Moist Maritime
Description: DISTRIBUTION: The CWHmm2 occurs at higher elevations along the leeward side of the Vancouver Island Ranges, below the MH zone. Elevational limits range from approximately 700 to 1100 m.

CLIMATE: Compared with the submontane variant, the CWHmm2 has cooler temperatures, shorter growing seasons, and heavier snowfall, with snowpacks persisting throughout the winter. Like the submontane variant, the CWHmm2 has a growing season water deficit from the rainshadow effect of the Vancouver Island mountains. Climatic data are lacking for this variant.

VEGETATION: Forests on zonal sites are dominated by Hw, Ba, Fd, and minor amounts of Yc and Hm (more common at upper elevations and on wetter sites). The understorey features abundant Alaskan blueberry and lesser amounts of salal, oval-leaved blueberry, and black huckleberry. Rhytidiopsis robusta, Rhytidiadelphus loreus, and Hylocomium splendens dominate the well-developed moss layer. A history of wildfires has contributed to the relatively large stand component of Fd throughout the CWHmm2.


Area (Ha): 227947.79  
TEM Area (Ha): 2954.83  
% of Prov BEC w/ TEM: 1.30  
  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