Epiphytic Macrolichen Diversity

Platismatia glauca This project was designed to: survey and document the epiphytic macrolichen diversity of three ages of forests in the Date Creek research area; produce an inventory of epiphytic macrolichens at 21 forested sites at Date Creek, monitor lichen diversity and species composition over time and make recommendations on the most effective silvicultural system for maintaining epiphytic macrolichen diversity.
Platismatia glauca

Available Literature:

Goward, T. 1995. Nephroma occultum and the maintenance of lichen diversity in British Columbia. Mitteilungen der Eidgenössischen Forschungsanstalt fü Wald, Schnee und Landschaft 70:93-101.

Goward, T. 1994. Notes on oldgrowth-dependent epiphytic macrolichens in inland British Columbia, Canada. Acta Bot. Fennica 150: 31-38.
Lobaria oregana Abstract: The occurrence of 24 species of epiphytic macrolichens, many of which have previously been assumed to have strictly coastal distributions in western North America, is documented for five humid forests in inland British Columbia. These lichens were detected only in very old forests, and appear to be essentially absent from younger forest types in this region. Old growth forests possibly favour such species by reason of their equable microclimate and relative environmental stability.
                       Lobaria oregana
The possibility is raised that some species may be relicts from the "Little Ice Age", when climatic conditions were presumably more favourable to long-distance dispersal by lichens outside their current primary ranges. Not all old growth forests are equally rich in old growth-dependent lichens. Diversity appears to be positively correlated with forest age or, more precisely, with environmental continuity.   In support of this, it is observed that successful long-distance dispersal by old growth dependent lichens occurs only rarely; older old growth forests can therefore be expected to support a fuller component
 of such species than younger oldgrowth forests.  The possibility is raised that oldgrowth-dependent lichens may provide a rough index of environmental continuity in the oldest of British Columbia’s inland forests. The term "antique" is applied to such forests. It is concluded that oldgrowth forests (="antique forests") are more valuable for the purposes of lichen conservation than young old growth forests. Loberia retigera
Loberia retigera

 Goward, T. and Goffinet, B. 1993. Nephroma silvae-vetris, a new lichen (Ascomytina) from the Pacific Northwest of North America. The Bryologist 96 (2): 242-243.
Nephroma silvae-vetris Abstract: Nephroma silvae-vetris sp. nov. is described from British Columbia, Canada, where it occurs as an epiphyte in old-growth forests in humid localities. Constictic, cryptostictic, norstictic, stictic, and usnic acids (and possibly Pcr4) are its primary phenolic constituents. Nephroma silvae-vetris is morphologically somewhat similar to, but chemically distinct from, the blue-green phototype of Nephroma arcticum.
Nephroma silvae-vetris

Goward, T. and Miege, D. 1996. Notes on the distributional ecology of epiphytic macrolichens in the Kispiox and Nass valleys, with special reference to species of old-growth forests. Part 1: The interior cedar–hemlock zone (moist cold subzone). Min. For. Sci. Sec., Smithers, B.C. Contract report 30 p.

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