Limiting Factors in Phytoplankton Algae: Their Meaning and Measurement

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Science  10 Nov 1972:
Vol. 178, Issue 4061, pp. 616-617
DOI: 10.1126/science.178.4061.616


There are two common responses of plants to changes in concentration of limiting factors: change in the final yield (type I response) or change in the growth rate (type II response). Type II is typical of phytoplankton algae in nature, yet some experiments have failed to show growth rate changes because of inappropriate experimental design.