Canadian Forest Service Publications

Arboreal lichens in successional forests on southern Vancouver Island. 1998. Enns, K.A.; Trofymow, J.A.; Goodman, D. Natural Resources Canada, Canadian Forest Service, Pacific Forestry Centre, Victoria, BC. Information Report BC-X-382. 22 p.

Year: 1998

Issued by: Pacific Forestry Centre

Catalog ID: 5176

Language: English

Series: Information Report (PFC - Victoria)

Availability: Order paper copy (free), PDF (download)

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Abstract

Changes in the relative abundance and diversity of arboreal lichens on young branches were studied on chronosequence plots established on southern Vancouver Island by the Canadian Forest Service at four sites in the Very Dry Maritime (CWHxm) and four sites in the Very Wet Maritime (CWHvm) Coastal Western Hemlock (CWH) biogeoclimatic subzones. A total of 32 stands were sampled. Each site had a chronosequence of stands of four age classes: old growth (176-435 years), regeneration (3-9 years), immature (32-43 years), and mature (66-99 years) stands. The branches examined had been sampled for foliar nutrient analysis study being conducted on these sites. Entire branches were collected from the upper crown of three trees of each species found in each plot. To supplement this undirected sample, a more directed sample was conducted at one site in the CWHxm (Koksilah) where lichens on older windfall branches and on the bark were also sampled. Lichen individuals were counted and identified to the species level. Many young branches had no lichens or had recent immigrants only. On young branches or older substrates, more species were found in mature or old-growth plots than in immature or regenerating plots. Branches from old-growth plots had more highly structured and richer communities, and more species of crustose lichens. There were more species of lichens on Douglas-fir, which predominates on the drier sites, than on other conifers, and the drier sites in the CWHxm had a richer lichen flora than those in the wetter CXHvm.