Indagine limnologica sul lago Campo a distanza di 18 anni (1997-2015)

Lake Campo is a small oligotrophic alpine lake in the Italian Alps (altitude 1943 m asl, A = 87000 m2 zmax = 27m). Allochthonous fish (brown trout -Salmo trutta, rainbow trout - Oncorhynchus mykiss and burbot - Lota lota) were removed from the lake between 2004 and 2008 and the lake was restocked with the autochthonous Artic Char Salvelinus alpinus. Limnological analyses were carried out 4 times in 1997 and 7 times in 2015 during the ice-free period. Temperature sensors were placed at 0m and 25m from May to November in 2015. Secchi disk readings and chlorophyll a values did not change between 1997 and 2015. Anglers lament a lack of char, but no changes in the zooplankton community were detected between the 1997 and 2015 samples and the body size of Daphnia, the main constituent of the zooplankton, did not change.