Table 2 Variations in environmental parameters

Depth (cm)

110.7 ± 70.2

157.5 ± 100.2

118.6 ± 91.8

(35 to 280)

(24.6 to 380)

(30 to 320)

Transparency (cm)

69.8 ± 29.2

82.5 ± 106.7

44.8 ± 25.5

(31 to 115)

(24.6 to 380)

(25 to 100)

Temperature (°C)

24.8 ± 1.0

26.4 ± 1.2

24.7 ± 1.3

(23.4 to 27)

(24.6 to 28.6)

(23.2 to 27.3)

Salinity

17.9 ± 9.9

10.4 ± 3.7

11 ± 8.6

(4 to 32)

(2.4 to 14)

(2 to 27)

pH

7.3 ± 0.4

7.2 ± 0.3

8.1 ± 0.6

(6.61 to 7.7)

(6.7 to 7.74)

(7.05 to 8.98)

Dissolved oxygen (O₂ m l⁻¹)

5.6 ± 0.5

4.8 ± 1.3

4.8 ± 1.2

(4.9 to 6.5)

(2.52 to 6.5)

(2.6 to 6.45)

Nitrites (NO₂ mg l⁻¹)

0.00 ± 0.0

0.005 ± 0.006

0.014 ± 0.008

(0.00 to 0.045)

(0.00 to 0.02)

(0.004 to 0.03)

Nitrates (NO₃ mg l⁻¹)

0.100 ± 0.1

1.210 ± 1.021

0.028 ± 0.031

(0.00 to 0.4)

(0.0 to 3.0)

(0.01 to 0.11)

Ammonium (NH₄ (mg l⁻¹))

0.6 ± 0.4

0.093 ± 0.057

0.036 ± 0.023

(0.12 to 1.2)

(0.0 to 0.22)

(0.02 to 0.09)

Phosphates (PO₄ ⁻ mg l⁻¹)

0.2 ± 0.1

1.731 ± 2.5

1.867 ± 2.811

(0.12 to 0.3)

(0.22 to 7.2)

(0.08 to 6.84)

Bacterial density (BD (cells.ml⁻¹ × 10⁶))

2.9 ± 2.1

3.8 ± 1.8

4.5 ± 1.3

(0.67 to 8.3)

(1.3 to 6.9)

(2.6 to 6.72)

Bacterial biomass (BBM (μg.C.m⁻³))

2.6 ± 0.9

2.7 ± 1.4

4.3 ± 2.1

(1.2 to 3.8)

(0.7 to 4.5)

(1.8 to 9.3)

Chlorophyll a (CHLA (mg l⁻¹))

1.2 ± 0.5

3.8 ± 3.9

0.7 ± 0.5

(0.5 to 1.9)

(0.05 to 18.3)

(0.06 to 1.6)

Chlorophyll b (CHLB (mg l⁻¹))

0.5 ± 0.7

1.4 ± 1.3

0.8 ± 0.6

(0.1 to 2.4)

(0.24 to 4.1)

(0.07 to 1.9)

Chlorophyll c (CHLC (mg l⁻¹))

4.0 ± 3.4

1.4 ± 1.3

0.3 ± 0.3

(0.2 to 9.6)

(0.21 to 4.4)

(0.004 to 0.9)