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P

  1. Pacific Ocean (see also North Pacific and South Pacific):

    1. boundaries, 11

    2. equatorial region, 706712

      1. currents, 708712

      2. oxygen content, 710, 711

      3. phosphate, 710, 711

      4. silicate, 710, 711

      5. water masses, 706708

    3. oxygen distribution, 728730, 753

  2. Palagonite, 1027

    1. frequency of occurrence, 987

  3. Pelagic environment and its subdivisions 278

  4. Pelagic sediments (deposits), 972

    1. areas covered by, 977

    2. average percentage of calcium carbonate, 1006

    3. chemical composition, 991, 992

    4. classification, 972973

    5. color, 978, 979

    6. content of organic matter, 1015

    7. depth range, 978

    8. distribution, 974978

    9. inorganic constituents, 986990

    10. iron content, 992, 10301032

    11. manganese content, 992, 10281031

    12. minerals, 986990

    13. organic constituents, 983986

    14. phosphorus content, 992, 1032

    15. radium content, 1034, 1035

    16. rate of deposition, 1038, 1039

    17. texture, 979982

  5. Pendulum day, 437

  6. Permeability of sediments, 994

  7. Persian Gulf, 690

  8. Peru Current, 701705

    1. comparison with California Current, 703

    2. organic production in, 942

  9. Petroleum formation in marine sediments, 947, 1009

    1. possible role of bacteria, 996

  10. Pettersson-Nansen water bottle, 352

  11. Phaeocystis, 301

  12. Phillipsite, 1027

    1. frequency of occurrence, 987

  13. pH of sea water, 193

    1. determination, 193, 194

    2. distribution, 208210

    3. role in carbon dioxide system, 195202

  14. Phosphate:

    1. as a limiting factor, 768, 788

    2. distribution:

      1. factors influencing, 246, 247

      2. in basins, 245, 246

      3. in oceans, 239241

        1. related to deep-water circulation, 754

      4. in South Atlantic, 786788

    3. regeneration, 260261

      1. in isolated areas, 932

    4. seasonal variation, 258

    5. utilization of, by plants, 768, 931932

  15. Phosphate-phosphorus, ratio to nitrate-nitrogen, 236, 243

  16. Phosphorescence (see Bioluminescence)

  17. Phosphorite nodules, 952, 1032, 1033

  18. Phosphorus, 182

    1. in red clay, 1030, 1032, 1033

    2. organic, in sea water, 257

  19. Phosphorus cycle in the sea, 260261, 916

  20. Phosphorus-nitrogen ratio in plankton, 236

  21. Photosynthesis of phytoplankton, 774

    1. energy and illumination, 776

    2. experiments, 777782, 933

      1. assimilation, 777

  22. Photosynthesis ratio to respiration, 933


  23. 1072
  24. Physalia:

    1. reproduction, 320

    2. systematic position, 306

  25. Phytoplankton (see also Plankton):

    1. collection and analysis, 382383

    2. number of important species in, 762

    3. photosynthesis, 774782

    4. relation to zooplankton, 898904

  26. Phytoplankton production, 923934

    1. factors of (see Diatoms and Dino-flagellates)

    2. index of:

      1. direct census, 927

      2. oxygen production and consumption, 933934

      3. plant nutrient consumption, 931933

      4. plant pigment units, 928

  27. Pigments extracted from mud, 969

  28. Plankton (see also Phytoplankton and Zooplankton), 281

    1. adaptations, 821823

    2. collecting methods, 376383

    3. equivalents, 929

    4. macro-, micro-, and nannoplankton, 819

    5. neritic, 820

    6. oceanic, 821

  29. Plankton and filter feeders, 886892

  30. Plant nutrients, 235

    1. and vertical circulation of water, 782790

      1. convection, 790

      2. regions of divergence and convergence, 787, 788

      3. stabilization, 789

      4. turbulence, 787789

      5. upwelling, 785786

    2. factors influencing distribution, 235, 236

    3. renewal in surface layers:

      1. Antarctic region, 620

      2. Equatorial Countercurrent, Atlantic, 636

      3. Equatorial Countercurrent, Pacific, 712

      4. North Atlantic, 682

      5. off coast of California, 725

      6. off coast of Peru, 702

      7. off west coast of South Africa, 628

    4. storage in the sea, 784785

    5. winter maxima and summer minima, 939

  31. Plants (see also Algae and Eel grass):

    1. higher plants, 302303

    2. major producers in the sea, 287

    3. Thallophyta, 288302

  32. Platyhelminthes, 307

  33. Pleurobrachia, 307, 890

  34. Polymerization of water, 47

  35. Population, 162

  36. Porosity of sediments, 993, 994

  37. Portuguese man-of-war (see Physalia)

  38. Potassium, 179

  39. Potential temperature (see Temperature)

  40. Pressure (see also Isobaric surfaces):

    1. as an ecological factor, 273

    2. field of, 405

    3. internal field, 408

    4. total field, 413

    5. units, 55, 170

  41. Pressure gradient, 405

  42. Preying animals, 896898

  43. Primary food of the sea, 882, 883

  44. Production (see Organic production and Phytoplankton production), 162

    1. importance of, to organic matter in sediments, 1011, 1015

  45. Projections, map, 10

  46. Protozoa:

    1. reproduction, 319

    2. synopsis, 304305

  47. Pteropod ooze (see Pelagic sediments)


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