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Source: Image of Biome map, pd, http://en.wikipedia.org/wiki/Biome, Image of taiga, pd, http://en.wikipedia.org/wiki/Taiga, Image of biome graph, pd, http://en.wikipedia.org/wiki/Biome
areas of the earth with similar climatic conditions, plant life, and animal life
the number and relative abundance of species in a given area
the total weight of plants, animals, and other organisms in a given area