FOR305H1 Lecture 2: Lecture 2 - Angiosperms
Document Summary
Often have this, but not always: lenticels. Horizontal marks in bark for gas exchange between inside and outside of trees. 12 birch species in na: 10 occur in canada (b/c birch = northern species, 6 occur in ontario. Habitat: occur mostly in boreal forest but also in temperate forests around great lakes, occur in well-drained upland sites, often occur in recently disturbed areas (ex: where fire has come through) Because they"re niche is that they do well in disturbed areas. Shade tolerance: very intolerant, can establish after disturbance, pioneer species. Uses: doesn"t have desirable properties in terms of lumber (no stability or sawing properties, but good for pulpwood (paper, plywood (low value uses, veneer (often used in ikea furniture as appealing layer, birch bark canoes, birch beer. 2 common names for same group: heart-shaped leaves, often has barked that looks like birch (light coloured, toothed margins, clonal.
