PPT Slide

III. Species Diversity

C. Global patterns

HIGH LOW

1. Tropics (Low latitudes) Poles (High latitudes)

2. Continental shelf Deep water

3. Mountainous regions Flat lands

Hypotheses for mechanisms creating these patterns:

1. Climatic stability (seasonal change)

2. Spatial heterogeneity

3. Evolutionary time (since last glaciation)

10

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