{"refrec":{"BRefID":14255,"RR":"<b>Spitzer, D.</b> (1980). Efficiency of primary production in the upper layer of the euphotic zone of the tropical North Atlantic. <i>Neth. J. Sea Res. 14(2)</i>: 220-228","BEntID":14255,"PublicFlag":1,"CheckedFlag":0,"wosflag":0,"vabbflag":0,"RefStringPartII":". <i>Neth. J. Sea Res. 14(2)</i>: 220-228","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Spitzer, D.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Spitzer, D.","Englishabstract":"Parameters relating the photosynthesis in the sea to the radiative conditons are described and calculated for both eutrophic and oligotrophic waters. The radiation utilization efficiencies and photosynthesis quantum yields are compared. The quantum yield is found to increase in the regions with low chlorophyll a and nutrients concentrations. 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