BIOL208 Lecture Notes - Metapopulation, Main Source

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*glacier and fire = major factors in landscape creation: tree burning only near urban areas; remote areas are left alone economy is factor, *this is bad. Some coniferous trees have cones that are sealed shut can only open to disperse seeds when subjected to lots of dry heat that they get from forest fires. Canada was originally covered by two major ice sheets: gap between the two = modern-day cypress hills, has species that are only found farther south of that space (disjointed species) *ecosystem engineers: ex. beavers, alter flow of stream, alter successional pattern of land plants, ex. humans via agriculture, *only 5% of aspen park region is preserved the rest has been converted to urban/agricultural land. *grasslands are the most modified (by humans) biomes in the world modified landscape has been internalized: patches in matrix. *described by: size, shape, composition, number, position (near or far apart from each other or other aspects of that system)

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