Canonical correspondence analysis (CCA) showing the distribution of relative abundances of each group of BALOs (Bacteriovoracaceae, Bdellovibrionaceae, and Peredibacteraceae) quantified by qPCR, according to ecological variables measured during samplings. Temp, temperature; PT, total phosphorus; NH4, ammonium; SiO2, silicate; Cond, conductivity; O2, dissolved oxygen.