Assessment of the Trophic Status of the South Lagoon of Tunis (Tunisia, Mediterranean Sea): Geochemical and Statistical Approaches

Table 2

Pearson correlation matrix of water quality variables of the South Lagoon of Tunis.

Variables	T°C	pH	O2	Salinity	SPM	NH4^+	NO2^−	NO3^−	Ortho-P	Chl a	Pheo	Turbidity	Transparency
T°C	1	−0.04	−0.93	0.74	0.68	0.90	−0.97	0.31	0.64	0.12	0.91	0.85	−0.39
pH		1	0.32	0.32	0.02	−0.18	−0.02	0.41	0.27	0.20	−0.09	0.12	−0.09
O2			1	−0.57	−0.65	−0.87	0.89	−0.15	−0.54	−0.06	−0.88	−0.78	0.35
Salinity				1	0.50	0.64	−0.72	0.41	0.66	0.10	0.72	0.58	−0.42
SPM					1	0.49	−0.60	0.04	0.23	0.11	0.63	0.85	−0.51
NH4^+						1	−0.87	0.31	0.57	0.07	0.87	0.70	−0.37
NO2^−							1	−0.38	−0.65	−0.14	−0.87	−0.79	0.34
NO3^−								1	0.48	0.12	0.31	0.23	0.07
Ortho-P									1	0.07	0.61	0.46	−0.07
Chl a										1	0.20	0.15	0.12
Pheo											1	0.78	−0.31
Turbidity												1	−0.45
Transparency													1