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Numerical response of Histiobalantium bodamicum (A–D) and Vorticella natans (E–H) over temperature ranging from 5 to 20 °C and food levels ranging from 0.02 to 7.0 mg C/liter. Horizontal dotted lines mark the zero growth rate; vertical lines show moderate (0.5 mg C/liter) and high (2.0 mg C/liter) food concentrations. Dashed lines mark the 95% confidence interval of the curves.
