Fig. 5: Temperature-induced phosphorus fluxes from sediments and suspended particles.

a Schematic diagram of the experimental system used to quantify phosphorus fluxes between sediment or suspended particulate matter (SPM) and algal cells under controlled temperature conditions. Algal cells were enclosed in dialysis bags and incubated in contact with sediment or SPM, allowing molecular exchange without direct physical contact between cells and particles, within a temperature-controlled water bath. Temporal changes in inorganic phosphorus (DIP) (b) and total phosphorus (TP) (c) concentrations in the surrounding water over time (0–240 min) at 15, 25, and 35 °C for Microcystis aeruginosa, Raphidiopsis raciborskii, Dolichospermum flos-aquae, and Aphanizomenon flos-aquae. Corresponding accumulation of intracellular DIP (d) and TP (e) in algae under the same temperature treatments, expressed on a dry weight basis.