1. Open Oceans: Pelagic Ecosystems III

2. Comparing the makeup of water and plankton Mean Elemental Ratios of N, and P Organisms: 16.0N / 1P Sea Water: 14.7N / 1P On average, seawater lacks sufficient organic N to take advantage of the available phosphorus

3. Limited water mixing further limits nutrient availability

4. Testing models: measuring plankton in open oceans Techniques for studying plankton consumersTechniques Plankton levels may be dropping (NASA study)

5. Changes in Productivity

6. From productivity to food webs: A size-based pelagic food web

7. Grazing pressure

8. Limits & Flows of NPP

9. Marine “Snow” krill

10. A spatially realistic pelagic food web

11. What are links among trophic levels in pelagic systems?

12. Large phytoplankton vary with depth

13. Nutrient distribution with depth

14. Distribution of food web biomass

15. The global nitrogen cycle

16. Influences on biologically useful Nitrogen

19. Diatom mats can migrate vertically

20. Consequences of active transport of NO 3

21. Links to oceanic nekton