Open Access
Table 1
Zooplankton species composition and mean density [indiv. L−1] at sites number 1 and 2 in the Kortówka River − only dominants and species of a high constancy of occurrence are shown.
| Zooplankton taxa | Site | Mean density (SD) | D * | C ** |
|---|---|---|---|---|
| Anuaeropsis fissa (Gosse, 1851) | 1 | 32.1 (36.9) | +++ | xx |
| 2 | 29.8 (52.5) | +++ | xx | |
| Ascomorpha ecaudis (Perty, 1850) | 1 | 3.2 (4.1) | x | |
| 2 | 3.6 (2.9) | + | xx | |
| Ascomorpha ovalis (Bergendal, 1892) | 1 | 2.7 (2.6) | + | xx |
| 2 | 1.9 (1.7) | x | ||
| Asplanchna priodonta (Gosse, 1850) | 1 | 6.7 (5.6) | + | xx |
| 2 | 5.5 (6.1) | + | xx | |
| Keratella cochlearis (Gosse, 1851) | 1 | 41.8 (78.6) | +++ | x |
| 2 | 25.1 (14.5) | +++ | x | |
| Keratella cochlearis var tecta (Gosse, 1851) | 1 | 33.1 (21.2) | +++ | xx |
| 2 | 25.2 (14.5) | +++ | xx | |
| Polyarthra dolichoptera (Idelson, 1925) | 1 | 18.4 (13.1) | +++ | xx |
| 2 | 13.3 (10.0) | ++ | xx | |
| Polyarthra major (Burckhardt, 1900) | 1 | 10.3 (9.4) | ++ | xx |
| 2 | 8.3 (6.7) | ++ | xx | |
| Proales sp. | 1 | 1.7 (0.8) | ||
| 2 | 6.4 (6.4) | + | xx | |
| Trichocerca pusilla (Lauterborn, 1898) | 1 | 3.1 (3.3) | · | x |
| 2 | 4.0 (3.4) | + | x | |
| nauplius | 1 | 13.4 (8.1) | ++ | xx |
| 2 | 11.0 (9.1) | ++ | xx | |
| copepodite (Cyclopoida) | 1 | 2.8 (1.3) | · | x |
| 2 | 2.8 (3.8) | · | x |
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