Variability in the Structure of Phytoplankton Assemblages in relation to Human Disturbance in Southern Coast of Tunisia

Table 1

The mean ± SD values of physical and chemical variables measured at all stations during the sampling period. Difference between control station (M) and disturbed station (K) was tested by ANOVA.

Variables	Unit	𝑁	Disturbed station (K)	Control station (M)	𝐹(1,16)	Tukey’s test
SM	g·L^−1	9	12.00 ± 6.76	7.00 ± 0.70	4.32	n.s.
NO2^−	𝜇mol·L^−1	9	0.301 ± 0.12	0.283 ± 0.09	0.119	n.s.
NO3^−	𝜇mol·L^−1	9	4.91 ± 2.85	5.91 ± 0.04	0.98	n.s.
NH4^+	𝜇mol·L^−1	9	23.36 ± 16.80	4.17 ± 0.19	10.42*	M < K
PO4^3−	𝜇mol·L^−1	9	0.307 ± 0.17	0.684 ± 0.05	25.33***	K < M
Si(OH)4	𝜇mol·L^−1	9	8.28 ± 1.93	0.94 ± 0.05	115.41***	M < K
TP	𝜇mol·L^−1	9	3.26 ± 0.84	3.34 ± 0.34	9.86*	M < K
TN	𝜇mol·L^−1	9	45.29 ± 26.08	16.32 ± 0.47	9.86*	M < K
pH		9	7.97 ± 0.15	7.32 ± 0.34	25.70***	M < K
Salinity	g·L^−1	9	38.91 ± 0.44	38.24 ± 0.88	3.96	n.s.
𝑇^∘	°C	9	31.03 ± 1.05	27.26 ± 0.96	59.02*	M < K

^∗𝑃<0.05; ^∗∗∗𝑃<0.001; SM: suspended matter; n.s.: not significant.