Photos: © Steve Trudell,
Sharmin Gamiet,
L. Gilmore, GVRD


A macrofungus biodiversity study of old-growth forest was conducted in the Coastal Western Hemlock (CWH) biogeoclimatic zone in Seymour Watershed, one of Greater Vancouver Regional District’s (GVRD) watersheds, Vancouver, B.C. Canada. This study was confined to the above-ground ectomycorrhizal fungal fruiting bodies associated with forests in the CWH very moist (vm) subzone. The CWH zone is one of the fourteen biogeoclimatic zones of British Columbia (B.C.), is the rainiest of all zones, occurs at low to middle elevations, has a cool climate, with an annual average temperature of 8°C and an annual precipitation of 2,228mm (Meidinger and Pojar 1991). The very moist subzone is 1 of 10 subzones in the CWH zone and is separated from the other subzones by its continentality (Index of Continentality = 14) (Rose and Grant 1976) and precipitation (mean annual precipitation = 2,787mm). The CWHvm subzone is separated into 2 variants, a low elevation (vm1) variant, and a high elevation (vm2) variant.

The CWHvm subzone in Seymour Watershed, is dominated by western hemlock (Tsuga heterophylla), and silver fir (Abies amabilis) forests, with western redcedar (Thuja plicata) present on the low elevation sites, and yellow cedar (Chamaecyparis nootkatensis) present only on the high elevation sites. Mountain hemlock (Tsuga mertensiana) is present on some of the high elevation sites.

Sampling occurred on 17 different research plots, each 2,500 m2 starting in May and ending when snowfall made it impossible to access the plots.

After 4 years of sampling, approximately 3,500 specimens and about 200 different ectomycorrhizal macro fungal species were collected. Of these, about 45 species were found in all 4 years of sampling. Of these 45 species, only 29 have been previously reported for B.C and these are reported here. The remaining unreported and new species for the province will be published in scientific journals first, and then added to this web page.

Further Readings:

Meidinger, D. V. and J. Pojar. 1991. Ecosystems of British Columbia. Min. of Forests, Spec. Rep. Ser. No. 6. Victoria, B.C. pp 329.

Rose, M.S. and C. Grant. 1976. Remote station climate prediction model. B.C. Environ. Land Use Comm. Secr., Data Serv. Div., Victoria, B.C.