Abstract
Summer populations of the phytoplankton of the Loosdrecht Lakes were enclosed in laboratory scale enclosures (LSE), supplied with 7.5 μg P.l−1.d−1 and 105 μg P.l−1.d−1, respectively. The maximum initial phosphate uptake rate (Vm) was related to irradiance and primary production. At phosphate uptake saturating light-irradiance Vm values up to 4 times the Vm values in the dark were measured.
The phosphate uptake capacity per unit dry weight remained more or less constant throughout the experiments in the LSE receiving the lower amount of phosphorus, and declined in the LSE receiving the higher amount of phosphorus. Within the range of Vm values measured (<10 μg P.mg DW−1.h−1 or 1,3 μg P. μg chla −1.h−1), the growth rate of the phytoplankton was not influenced by alterations in phosphorus availability.
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Sweerts, JP.R.A., Gons, H.J. & Rijkeboer, M. Phosphate uptake capacity of summer phytoplankton of the Loosdrecht Lakes in relation to phosphorus loading and irradiance. Hydrobiological Bulletin 20, 101–107 (1986). https://doi.org/10.1007/BF02291155
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DOI: https://doi.org/10.1007/BF02291155