BIOL 2903 Lecture Notes - Lecture 2: Northern Hawk-Owl, Great Grey Owl, Forest Tent Caterpillar Moth
Document Summary
As many animals in the boreal forest they are not shy. Needle eaters: snowshoe hares goes through dramatic population cycle in boreal forest, peaking every 10 years. Also affect bird survival: tennessee warbler, cape may warbler and bay-breasted warbler (all niche partitioning-share their resource: boreal forest. Lay of the land: relief (not flat), trees. Canadian shield has rocks 1-3 billion years old. Southern boundary: great lakes- st. lawrence river region. Conifers are dominant: black spruce, white spruce, balsam fir and jack pine. Poplars are also present (white birch and trembling aspen) Warmer (+1 to -3 c), and a longer growing season. Western (prairie) boreal: poplar and white birch. As many animals in the boreal forest they are not shy: red squirrels, deer mouse, marten, great grey owl more crepuscular, meaning active in twilight (irruption species move, hawk owl, northern hawk owl with food supply)
