Research Article
Spatial Distribution of Zooplankton Diversity across Temporary Pools in a Semiarid Intermittent River
Table 1
Environmental variables measured at the Paraiba River basin during the 2010 hydrological cycle.
| | River reach | Cariri | Caraúbas | Santana | | Season | Wet* | Dry** | Wet | Dry | Wet | Dry |
| | Water quality | | | | | | | | pH | 7.8 | 7.6 | 7.9 | 7.5 | 8.2 | 7.6 | | Dissolved oxygen (mg/L) | 6.1 | 8.8 | 7.2 | 3.4 | 6.9 | 7.0 | | Conductivity (µS/cm) | 2.2 | 3.9 | 915.3 | 1092.3 | 2.8 | 4.7 | | Temperature (°C) | 27.1 | 30.9 | 26.0 | 27.6 | 26.1 | 27.4 | | Water transparency (cm) | 58.3 | 56.0 | 75.0 | 115.0 | 69.0 | 63.0 | | Water velocity (m/s) | 0.1 | 0 | 0 | 0 | 0 | 0 | | Morphometry | | | | | | | | Average depth (cm) | 44.2 | 61.3/62.0 | 51.4 | 52.1 | 47.0 | 40.3 | | Average width (m) | 19.0 | 23.9/17.8 | 9.3 | 10.3 | 65.1 | 63.7 | | Length (m) | n.a. | 19.9/13.7 | 78.8 | 78.6 | 365.0 | 290.0 | | Total area (m²) | n.a. | 464.0 | 750.0 | 832.0 | 23400.0 | 17200.0 | | Reach altitude (m) | 420.0 | 420.0 | 423.0 | 423.0 | 315.0 | 315.0 | | Substrate composition (%) | | | | | | | Mud | 0 | 0.9 | 0 | 1.0 | 0.7 | 3.0 | | Sand | 78.3 | 90.4 | 98.8 | 99.5 | 89.5 | 83.8 | | Gravel | 21.6 | 8.3 | 1.3 | 0 | 9.2 | 13.3 | | Cobbles | 0 | 0.4 | 0 | 0 | 0.7 | 0 | | Habitat structure (%) | | | | | | | | Macrophytes | 0.1 | 9.0 | 15.0 | 50.0 | 22.4 | 27.5 | | Grass | 0 | 0 | 16.3 | 27.5 | 2.0 | 3.8 | | Submerged vegetation | 3.8 | 0 | 2.0 | 0 | 0.2 | 0 | | Vegetal cover | 5.0 | 6.3 | 0.3 | 0 | 0 | 1.3 | | Leaf litter | 5.0 | 2.0 | 0.3 | 0 | 0 | 0 | | Algae | 2.5 | 2.0 | 8.8 | 5.0 | 5.4 | 3.8 | | Woody debris | 4.0 | 8.0 | 1.3 | 0 | 2.5 | 1.3 |
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Reach with surface water flow. **Two pools were surveyed.
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