Table 3.

Numeric parameters of biological and hydrochemical variables as the nodes in correlation network built for water samples.

Parameter name	Betweenness centrality	Total number of correlation edges	Number of positive correlations	Number of negative correlations
Na+ concentration	0	15	13	2
K+ concentration	0	11	10	1
Ca2+ concentration	0.028	13	11	2
Mg2+ concentration	0.026	15	14	1
HCO3− concentration	0.017	16	13	3
C(CO2) concentration	0.174	17	4	13
C(CH4) concentration	0.071	2	2	0
Cl− concentration	0.011	15	13	2
N(NO2−) concentration	0.134	9	8	1
N(NO3−) concentration	0	7	7	0
S(SO42−) concentration	0.105	12	8	4
N(NH4+) concentration	0.137	7	7	0
P(PO43−) concentration	0.031	16	14	2
Si concentration	0.057	14	6	8
O2 concentration	0	0	0	0
Chemical oxygen depletion (COD)	0.017	12	12	0
pH	0.066	18	13	5
Organic carbon concentration (Corg)	0	4	4	0
Chlorophyll a concentration (Сhl_a)	0	7	6	1
Total phytoplankton biomass (∑PB)	0.023	13	11	2
Total rate of primary production (∑PP)	0.009	11	10	1
Biological oxygen depletion (BOD)	0	14	12	2
Total bacterial count (NB)	0.028	17	14	3
Count of organotrophic bacteria (OB)	0.003	7	7	0
Count of thermotolerant bacteria cultivating at 22 °C (TMC22C)	0.006	9	8	1
Count of thermotolerant bacteria cultivating at 37 °С (TMC37C)	0	6	6	0
Total rate of methane oxidation (∑MO)	0	1	1	0
Total bacterial primary production (∑BP)	0	6	6	0