GEOG 001 Lecture Notes - Lecture 25: Montane Ecosystems, Pinus Contorta, Picea Engelmannii
7 Dec 2020
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Shrublands, savannahs and grasslands -> are considered drylands, not forests. Canada"s 402 million(ha) of forested & other woodland. Represents (10%) of the world"s forest cover. White spruces, tamarack, jack & lodgepole pines (coniferous species) White birch, aspen, and balsam poplars (deciduous species) Located in british columbia & western alberta. Engelmann spruce, alpine fir, and lodgepole pine. Forests with a greater diversity of plants, such as tropical rainforests, host a greater number of organisms. Most commercial logging takes place in: russia, canada, brazil & indonesia. Timber harvesting methods: cutting all trees in the area are cut, leaving only stumps. Greatest impact on the forests" ecosystems: seed-tree approach. Small numbers of mature/ vigorous seed producing trees are left standing to produce new trees where the old ones were logged: selection systems only some trees are cut out at any one time. (single tree selection: widely spaced trees are cut one at a time. (group selection: a small patch of trees are cut.
