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What Happened to Biodiversity Last Time Climate Ran Amok? Duane Griffin Geography Dept.

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Presentation on theme: "What Happened to Biodiversity Last Time Climate Ran Amok? Duane Griffin Geography Dept."— Presentation transcript:

1 What Happened to Biodiversity Last Time Climate Ran Amok? Duane Griffin Geography Dept

2 The carpet of flowering verdure spread over the naked crust of the Earth is unevenly woven: more tightly where the sun rises higher in the…skies, more loosely nearer the inert poles. Alexander von Humboldt 1808

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4 Why? Species gains and losses Tropics:CradleorMuseum?

5 Cradle or Museum?

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8 How did the diversity gradient develop? ? ? Glacial Interglacial

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12 Glacial Interglacial

13 21,000 BP

14 20,000 BP

15 19,000 BP

16 18,000 BP

17 17,000 BP

18 16,000 BP

19 15,000 BP

20 14,000 BP

21 13,000 BP

22 12,000 BP

23 11,000 BP

24 10,000 BP

25 9,000 BP

26 8,000 BP

27 7,000 BP

28 6,000 BP

29 5,000 BP

30 4,000 BP

31 3,000 BP

32 2,000 BP

33 1,000 BP

34 500 BP

35 0 BP

36 How did the diversity gradient develop? Glacial Interglacial

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