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DIURNAL VARIATION IN PHOTOSYNTHETIC ACTIVITY OF NATURAL PHYTOPLANKTON POPULATIONS
Author(s) -
Lorenzen Carl J.
Publication year - 1963
Publication title -
limnology and oceanography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.7
H-Index - 197
eISSN - 1939-5590
pISSN - 0024-3590
DOI - 10.4319/lo.1963.8.1.0056
Subject(s) - photosynthesis , phytoplankton , productivity , diurnal temperature variation , range (aeronautics) , environmental science , atmospheric sciences , seasonality , variation (astronomy) , biology , ecology , oceanography , botany , nutrient , physics , geology , materials science , astrophysics , economics , composite material , macroeconomics
A study of fluctuations in potential photosynthesis in natural algal populations was undertaken at one geographical location over several months. The effect of seasons, i.e, daylength, proved to be the most significant factor modifying potential photosynthesis. Values of P max /P min , the daily range of fluctuation, varied from approximately 1 in December 1960 to a maximum of 9 during August 1961. Probable causes of the variation and its effect on productivity measurements are discussed.