Table 1.
General characteristics of the three analysed reservoirs and annual average values of some physical and chemical parameters.
Figure 1.
Chlorophyll a concentrations (average values from the three analysed water layers) from April to October 2010 measured in La Gileppe (dot), Ry de Rome (square) and Féronval (triangle). Boxes indicate sampling periods for both chemical and BCC analyses.
Figure 2.
Phytoplantkon community composition.
Phytoplantkon community composition over time (from April to October 2010) in the three analysed reservoirs by means of CHEMTAX pigment analyses and expressed as Chlorophyll a equivalents (μgr L−1).
Table 2.
Observed bacterial richness and diversity estimates based on OTUs for La Gileppe, Ry de Rome, and Féronval reservoirs.
Figure 3.
Hierarchical clustering analyses of Bray-Curtis similarities of the community composition at OTU level (0.03 cut-off) in the three reservoirs. Legend: G, La Gileppe (dots); RR, Ry de Rome (square); F, Féronval (triangles); e, epilimnion (white); m, metalimnion (grey); h, hypolimnion (black); 04, April 2010; 07, July 2010; 10, October 2010.
Table 3.
ANOSIM significance values based on OTUs (0.03 cut-off value).
Figure 4.
Bacterial community composition.
Relative proportion of bacterial retrieved groups (by b-TEFAP) at OTU level (0.03 cut-off) in the water layers of the three analysed reservoirs.
Figure 5.
Venn diagrams highlighting shared OTUs for each analysed water compartment (A, epilimnion; B, metalimion; and C, hypolimnion) and reservoir (i.e., La Gileppe, Ry de Rome and Féronval).
Figure 6.
Canonical and Factorial correlation analyses.
Canonical correlation analyses (A) and factorial correspondence analysis (B) of bacterial communities based on relative abundance at OTU level (0.03 cut-off) and environmental parameters in the analysed reservoirs and all sampling dates. Legend: G, La Gileppe (dots); RR, Ry de Rome (square); F, Féronval (triangles); e, epilimnion (white); m, metalimnion (grey); h, hypolimnion (black); 04, April 2010; 07, July 2010; 10, October 2010.
Table 4.
Results from BIO-ENV analyses of bacterial community composition and environmental parameters.