Temporal variability of dissolved P speciation in a eutrophic reservoir--implications for predicating algal growth.
Weak-anion exchange chromatography was used to explore the temporal variability in the speciation of dissolved P in the surface layer of a eutrophic reservoir. Authentic free ortho-P ion was the most common form of P on three of the five sampling occasions-including during a bloom of the green algae Botryococcus braunii indicating that the bloom was not P limited. Conversely, the absence of authentic ortho-P during a bloom of the dinoflagellate Ceratium hirundinella suggested the bloom was either P limited or co-limited. These observations were confirmed by algal-growth bioassay experiments.
Murray-Darling Freshwater Research Centre, The CRC for Freshwater Ecology, P.O. Box 921, Albury, NSW 2640, Australia. darren.baldwin@csiro.au
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Baldwin
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Whittington
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R
Oliver
D000460:Chlorophyta; D002852:Chromatography, Ion Exchange; D004784:Environmental Monitoring; D005068:Eutrophication; D005544:Forecasting; D010758:Phosphorus / Q000737:chemistry*; D011157:Population Dynamics; D012995:Solubility; D014881:Water Supply
D010758:Phosphorus