Thermal discharge-created increasing temperatures alter the bacterioplankton composition and functional redundancy

AMB Express

Table 2 Results of distance-based multivariate linear model for BCC showing the percentage of variation explained by individual environmental variables (ignoring other variables); and forward-selection of variables, where amount explained by each variable added to model is conditional on variables already in the model

Variable	F	P	Variation (%)	Cumulative (%)
Variables fitted individually
Grazing rate	4.31	0.001	8.4
PO₄ ³⁻	3.52	0.001	7.0
Temperature	3.26	0.001	6.5
Chlorophyll a	2.64	0.005	5.3
Salinity	2.61	0.003	5.3
Chemical oxygen demand	1.88	0.023	3.9
NH₃·H₂O	1.40	0.127	2.9
Cl⁻	1.36	0.139	2.8
Dissolved oxygen	1.31	0.140	2.7
NH₄ ⁺	1.22	0.215	2.5
NO₂ ⁻	1.14	0.271	2.4
NO₃ ⁻	0.96	0.433	2.0
pH	0.82	0.672	1.7
Oil	0.78	0.762	1.6
Variables fitted sequentially
Grazing rate	4.31	0.001	8.4	8.4
PO₄ ³⁻	3.86	0.001	7.1	15.5
Chemical oxygen demand	2.00	0.006	3.5	19.0
Dissolved oxygen	1.93	0.013	3.3	22.3
Temperature	1.72	0.022	3.0	25.3
Salinity	1.44	0.060	2.4	27.7
NO₂ ⁻	1.40	0.075	2.3	30.0
pH	1.22	0.159	2.0	32.0
NO₂ ⁻	1.17	0.204	1.9	33.9
Cl⁻	1.13	0.249	1.8	35.7
Oil	1.12	0.244	1.8	37.5
NH₃·H₂O	1.03	0.396	1.7	39.2
NH₄ ⁺	1.02	0.407	1.7	40.9
Chlorophyll a	0.93	0.536	1.5	41.4

The italic values indicate significant correlation between biogeochemical factors and BCC, P < 0.05 level