1. The Epipelagic The pelagic realm of the ocean describes the vast, open ocean. –The epipelagic realm is the upper part of this environment. Depths only to about 200m Corresponds to the depth of the euphotic zone –Euphotic depth the depth below which where there is no longer enough light for organisms to grow. –Divided into coastal, or neritic waters that lie over the continental shelf, and oceanic waters.

2. Net Tows

3. Plankton by Size Plankton: organisms that can’t swim against a current – Picoplankton (0.2 – 2  m) and Nanoplankton (2 – 20  m) »Mostly bacteria and very small single celled algae –Netplankton (>20  m) »Includes the larger phytoplankton and all of the zooplankton

4. Plankton by Size

5. Phytoplankton –Responsible for >95% of the photosynthesis in the oceans and over ½ the primary production on earth Most important members are diatoms and dinoflagellates. Cyanobacteria are also important phytoplankton because they are able to fix nitrogen, ie. turn inorganic nitrogen into organic nitrogen that can be used by phytoplankton.

6. Figure 15.03

8. Epipelagic Food Web

9. Copepod

10. Figure 15.07b

11. Larvacean

12. Pteropod

13. Figure 15.11b

14. Figure 15.11c

15. Figure 15.11d

16. Figure 15.11e

17. Fish Larva

18. Chaetognath (Arrow Worm)

19. Comb Jelly

20. Polychaete Worm

21. Copepod

22. Figure 15.13b

23. Crab Zoea

24. Fish Larva

25. Figure 15.13e

26. Snail and a Jelly

27. Nekton

30. Diel Vertical Migration

31. Neuston

32. Nekton

33. Staying Afloat

34. Camouflage

35. Epipelagic Food Web

37. Global Productivity

38. Figure 15.25b

39. Figure 15.26

41. Seasonal Productivity-Tropics

42. Seasonal Productivity- Temperate

43. Seasonal Productivity- Polar

44. Wind-Driven Upwelling

45. Global Upwelling

47. Figure 15.32