Lecture 1-16-07 - • 55-85 inches of rainfall/year •...

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BISC Lecture – 1/16/07 Taiga – permafrost Plants are fire adapted (lots of storms and lots of lightning) Bogs – bunches of grass Insect outbreaks – spruce bugworm (destroys spruce trees) Rate of decomposition – bacteria decomposes leaves and twigs on the ground (happens during three months of the summer) Coniferous Forest Diversity of plants and animals is low Pine trees, cedar trees, oak trees Animals – junco bird, chickadees birds, weasels, martins, fishers, wolverines, badgers, skunks, Epiphytes – plants that grow on trees (mosses) Fungus increases the surface area of a roots system Broadleaf Forest Very high diversity Oaks, maples, pines, beaches and birch trees A lot of nutrient recycling 100 species of trees in Smokey Mountain Natl. Park 1500 different kinds of flowering plants
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Unformatted text preview: • 55-85 inches of rainfall/year • Relatively little undergrowth • Near water is hemlock trees Rainforest • Highest diversity of anything • Vascular plants – In Sumatra • Variety of fruits • Majority of mammals are secretive – most of which are bats. • Main nutrients – nitrates and phosphates (important for plants) Lakes and ponds • Know the zones, layers • Insects, plankton, fish, flowering plants • Fall turnover – water from bottom enriches the water on the surface, plankton blooms with sunlight – plankton bloom is strongest in the Fall • Three types of lakes – oligotrophic lake (new), utrophic lake (older and richer in nutrients), then distrophic lake (overly rich, too much bacteria, plants die)...
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