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Practice Problems

49 = mammal species in California 94 = bird species in California 38 = mammal species in Alaska 79 = bird species in Alaska

Which of these ecosystems has the greater bird and mammal biodiversity?

• Find the total number of bird and mammal species in each ecosystem.

49 + 94 =143 (species in California) 38 + 79 = 117 (species in Alaska)

143 is larger than 117, so California has the greater bird and mammal biodiversity.

143 — 94 = 49 (mammal species in California) 117 — 79 = 38 (mammal species in Alaska)

1. Compare the biodiversity of the coastal temperate rain forest ecosystems of Oregon with 55 mammal species and 99 permanent bird species to the British Columbia ecosystem with 68 mammal species and 116 permanent bird species.

2. Compare the biodiversity of lizards in hot North American deserts that have an average of 6.4 ground-dwelling lizards and 0.9 arboreal lizards with those in Africa that have an average of 9.8 ground-dwelling lizards and 3.5 arboreal lizards.

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