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Population Growth Response of Isochrysis Galbana to Nitrate Variation at Limiting Concentrations
Author(s) -
Caperon John
Publication year - 1968
Publication title -
ecology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.144
H-Index - 294
eISSN - 1939-9170
pISSN - 0012-9658
DOI - 10.2307/1936538
Subject(s) - isochrysis galbana , nitrate , limiting , growth rate , nitrogen , nutrient , population , ecology , biology , environmental chemistry , chemistry , algae , mathematics , mechanical engineering , geometry , demography , organic chemistry , sociology , engineering
Data are presented from two continuous culture experiments with Isochrysis galbana using nitrate as limiting nutrient. It is suggested that initial uptake of nitrate is very rapid compared to the next synthesis step and thus that the concentration of some form of internal rather than environmental nitrogen controls growth rate when the nitrogen supply is limiting. Under this assumption the steady state growth rates are shown to fit a hyperbolic curve relating growth rate to the inferred internal nitrogen concentration.