Table 6 Comparison of environmental conditions in lower White River oxbow lakes during pre-carp (2002) and post-carp (2017) sampling periods
Parameter | Pre-carp period (2002) (mean ± SE) | Post-carp period (2017) (mean ± SE) |
|---|---|---|
Lake morphometric | ||
Surface area (ha) | 20.8 ± 2.5 | 24.6 ± 3.3 |
Length–width ratio | 16.6 ± 1.6 | 19.0 ± 2.6 |
Mean depth (m) | 2.2 ± 0.2 | 2.6 ± 0.3 |
Water quality | ||
Secchi (cm) | 65 ± 4 | 53 ± 3 |
Temperature (oC) | 23.6 ± 1.1 | 24.9 ± 0.3 |
Dissolved oxygen (mg/L) | 7.6 ± 0.4 | 6.6 ± 0.1 |
Conductivity (µS/cm) | 230 ± 5 | 262 ± 8 |
Total dissolved solids (mg/L) | 130 ± 3 | 170 ± 5 |
Morpho-edaphic index (%) | 72.4 ± 6.2 | 75.9 ± 7.7 |
Hydrology | ||
Mean daily stage – preceding years (m) | 5.1 ± 1.6* | 5.9 ± 1.7** |
Daily stage CV (%) | 30.7 | 28.9 |