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Table 2 Variations in environmental parameters

From: Spatiotemporal variations of zooplankton community in a shallow tropical brackish lagoon (Sontecomapan, Veracruz, Mexico)

Variables Dry Rainy Norte
(symbols, unit) (mean ± SD) (mean ± SD) (mean ± SD)
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)
  1. Numbers in body are mean ± standard deviation (SD), and ranges are enclosed in parentheses.