Average and standard deviation (10 replicates) of the estimated organic carbon (C), nitrogen (N) and phosphorus (P) per square meter per month present on the biofilm formed on the artificial substrates (first three columns).

Kilos of C, N, P estimated to be on Lake Maggiore shoreline (170 km) after a level variation of 1 m, in one month, assuming a 45° shore slope and rugosity index of granite. C∶P and C∶N molar ratios are reported. The periods of the appearance of the D. lemmermannii bloom are in bold. Average and standard deviation (10 replicates) of the estimated organic carbon (C), nitrogen (N) and phosphorus (P) per square meter per month present on the biofilm formed on the artificial substrates (first three columns).