40 30 20 10 Temperature/°C

Figure 5.3

Temperature dependence of light-saturated growth in a selection of freshwater phytoplanktic species. (a) Datasets normalised against a temperature on an Arrhenius scale (I03/K); (b) the slopes of the regressions plotted against the surface-to-volume ratios of the algae. The algae are: Ana, Anabaena flos-aquae; Ana cyl, Anabaena cylindrica; Ank, Ankyra judayi; Aph, Aphanizomenon; Ast, Asterionella formosa: Coel, Coelastrum microporum; Cry er, Cryptomonas erosa; Cry ov, Cryptomonas ovata; Dict, Dictyosphaerium pulchellum; Fra c, Fragilaria crotonensis; Lim r, Limnothrix redekei; Mic, Microcystis aeruginosa; Monor, Monoraphidium sp.; Ped b, Pediastrum boryanum; Pla ag, Planktothrix agardhii; Sc q, Scenedesmus quadricauda; Syn, Synechococcus. The least-squares regression inserted in (b) is fitted only to the solid points; its equation is P = 3.378 -2.505 log (sv-1). Redrawn with permission from Reynolds (1997a).

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