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Algal nutrient competition in continuous culture

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Summary

Natural phytoplankton from Lake Constance was exposed to competition experiments in continuous culture at 6 different molar rations of P∶Si as potentially limiting nutrients. As predicted by theory there was competitive exclusion of all species but one at single nutrient limitation, and coexistence of two species in steady state when P was limiting for one and Si for the other species. In one case coexistence of three species occurred. Equilibrium species composition, which stabilized after 3 to 6 weeks of cultivation, was independent of the species composition of the inoculum and only controlled by the nutrient regime. Comparability of experimental results and field observations is discussed.

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Sommer, U. Algal nutrient competition in continuous culture. Hydrobiological Bulletin 17, 21–27 (1983). https://doi.org/10.1007/BF02255189

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  • DOI: https://doi.org/10.1007/BF02255189

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