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Effects of phosphorus and nitrogen enrichment on the yield of some strains of Stigeoclonium Kütz. (Chlorophyceae)
Author(s) -
VRIES PIERRE J. R.,
SMET STEPHAN J. M.,
HEIDE JOOP
Publication year - 1985
Publication title -
freshwater biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.297
H-Index - 156
eISSN - 1365-2427
pISSN - 0046-5070
DOI - 10.1111/j.1365-2427.1985.tb00699.x
Subject(s) - phosphorus , nitrogen , nitrate , chlorophyceae , phosphate , nutrient , yield (engineering) , limiting , agronomy , environmental chemistry , biology , chemistry , botany , ecology , algae , biochemistry , physics , organic chemistry , mechanical engineering , engineering , chlorophyta , thermodynamics
SUMMARY.1 The combined effect of nitrate and phosphate concentrations on the yields of five selected strains of Stigeoclonium is demonstrated in a synthetic medium as well as in natural waters. 2 Increase of yield after addition of one nutrient depends on the concentration of the other. A graphic growth model based on the experiments in synthetic medium is presented, which allows prediction of yields at different combinations of nitrate and phosphorus concentrations. 3 In general, yields in natural waters before and after addition of nitrate and/or phosphate agree with the model. In some cases, other limiting factors appear to be involved. 4 The possible effects of nitrogen and phosphorus limitation on the phosphorus and nitrogen metabolism of the alga are discussed. 5 Neither an exponential model (Baule‐Mitscherlich) nor a hyperbolic model adequately describe the interaction demonstrated between nitrogen and phosphorus limitation.