Biology 2485B Lecture 4: Week 2 - Terrestrial Environments and Diversity
10 Mar 2017
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Document Summary
The major ecosystems on earth are classified as biomes. Biomes: a major regional complex of similar plant communities. A (cid:448)isual represe(cid:374)tatio(cid:374) of a regio(cid:374)"s average monthly temperature and precipitation. Tundra: very productive summer, birds migrate because insects emerge for a short period (massive amount available, northern canada and russia, not water stressed, there are very few months above freezing short growing period. Boreal forest: covers a lot of canada and russia canada has the largest continuous forest in the world, no water stress/does not get dried out very often (precipitation is always higher than temp (on. Savannah: there is high water stress few trees, usually tend to see acacia trees that grow in patches and elephants prevent them from taking over the biome, great potential for ecotourism. Desert: very little variation in rainfall (mostly low) e. g. sahara has almost none, mostly sand dunes, variation in amount of vegetation.
