1. MARINE ECOSYSTEMS GEOL 1033 (Lesson 36) ppt file 103-30b

2. Comparative Biological Productivity

3. GENERALIZED COASTAL ECOSYSTEM MODEL

4. FOOD CHAIN vs FOOD WEB Food chain –A simplifying concept –Occurs in small, stressed ecosystems Food web –Typical complexity of marine ecosystems

5. ECOLOGICAL PYRAMIDS Organism size vs. organism numbers vs. population weight

7. Food Pyramid

9. Upwellings Coastal upwellings –Meridional –Zonal –Monsoonal

10. Upwellings Upwelling types –Radial (lows) –Symmetrical (low- pressure belts) –Equatorial –One-sided

11. ONE-SIDED UPWELLINGS Associated with subtropical high pressure cells Note the Coriolis effect

12. BIOLOGICAL PRODUCTIVITY & UPWELLINGS Blue = one-sided; Blue-green = monsoonal; Green = equatorial & symmetrical merge Zonal upwellings (driven by zonal winds) Symmetrical (low air pressure) Equatorial (low air pressure) Meridional upwellings Subtropical high pressures Monsoonal Seasonal Associated with monsoonal winds

13. WORLD OCEAN BIOLOGICAL PRODUCTIVITY See p. 5

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15. GENERALIZED COASTAL ECOSYSTEM MODEL RIVERS NUTRIENTS SEA SUNLIGHT SEDIMENTS PRODUCERS CONSUMERS DECOMPOSERS