Biological Oceanography Department of Oceanography Pusan National University
Biological Oceanography Department of Oceanography Pusan National University
Radiation and photosynthesis n n n Light and photosynthesis Inhibition: shrinkage of chloroplast Compensation point GPP NPP
parameters n Pmax n Ki n Different species Different conditions n n n P/I ; physiological; light reaction Pmax : environmental conditions; nutrient conc. Temp. ; dark reaction
n n Pmax: increase at high temp. and high nutrients P/I ; small plankton has high values n Pico plankton can live deeper with less light
Critical depth n Depth limits of phytoplankton
Nutrients n Doubling time Generation time; number of generations produced per day n Effect of nutrient in growth rate n n Monod relationship
Dinoflagellate n Vertical migration to “Nutricline” n 체내의 영양염 농도가 증가율을 결정
Limiting factors n CO 2; abundant n Nitrate, phosphate, silicate, iron manganese; can be limiting
NO 3 와 NH 4
Synergic effects n Iron and nitrate reductase; 철이 질산 의 이용을 좌우한다. 질산환원 효소에 철이 필요함. 철과 질산이 상호 synergy 효과; 특히 큰 diatom 종류에서 n HNLC area; North pacific, Equatorial pacific, Antarctic
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