Humans have altered much of the Earth

Humans have altered much of the Earth -...

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Humans have altered much of the Earth’s surface, replacing original biomes with  urban or agricultural ones. The major terrestrial biomes include tropical forest, desert, savanna, chaparral,  temperate grassland, coniferous forest, temperate broadleaf forest, and tundra. Tropical forests  are found close to the equator. Tropical rain forests  receive constant high amounts of rainfall (200 to 400 cm  annually). In tropical dry forests, precipitation is highly seasonal. In both, air temperatures range between 25°C and 29°C year round. Tropical forests are stratified, and competition for light is intense. Animal diversity is higher in tropical forests than in any other terrestrial biome. Deserts  occur in a band near 30° north and south latitudes and in the interior of  continents. Deserts have low and highly variable rainfall, generally less than 30 cm per year. Temperature varies greatly seasonally and daily. Desert vegetation is usually sparse and includes succulents such as cacti and deeply 
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This note was uploaded on 01/04/2012 for the course BSC BSC1005 taught by Professor Orlando,rebecca during the Fall '10 term at Broward College.

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Humans have altered much of the Earth -...

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