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Table 3
Species of adult dragonflies collected. N − number of specimens, D − dominance [%], F − frequency [%].
| Species | Total | Before dredging | After dredging | Fish ponds | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| N | D | F | N | D | F | N | D | F | N | D | F | |
| Calopteryx splendens (Harris) | 22 | 5.1 | 0.5 | 17 | 6.0 | 1 | 5 | 3.8 | 0.1 | – | – | – |
| C. virgo (Linnaeus) | 37 | 8.6 | 0.6 | 24 | 8.5 | 0.8 | 13 | 10.0 | 0.7 | – | – | – |
| Lestes dryas (Kirby) | 3 | 0.7 | 0.1 | – | – | – | – | – | – | 3 | 18.8 | 0.5 |
| L. sponsa (Hansemann) | 50 | 11.7 | 0.4 | 36 | 12.8 | 0.6 | 14 | 10.8 | 0.4 | – | – | – |
| Sympecma fusca (Vander Linden) | 6 | 1.4 | 0.4 | 2 | 0.7 | 0.4 | 4 | 25.0 | 0.5 | |||
| S. paedisca (Brauer) | 14 | 3.3 | 0.4 | 11 | 3.9 | 0.6 | 1 | 0.8 | 0.1 | 2 | 12.5 | 0.5 |
| Platycnemis pennipes (Pallas) | 31 | 7.2 | 0.5 | 25 | 8.9 | 0.8 | 6 | 4.6 | 0.4 | – | – | – |
| Ischnura elegans (Vander Linden) | 80 | 18.7 | 0.6 | 62 | 22.0 | 0.8 | 14 | 10.8 | 0.6 | 4 | 25.0 | 0.5 |
| I. pumilio (Charpentier) | 1 | 0.2 | 0.1 | – | – | – | – | – | – | 1 | 6.3 | 0.5 |
| Pyrrhosoma nymphula (Sulzer) | 1 | 0.2 | 0.1 | – | – | – | 1 | 0.8 | 0.1 | – | – | – |
| Coenagrion puella (Linnaeus) | 81 | 18.9 | 0.6 | 63 | 22.3 | 0.8 | 18 | 13.8 | 0.7 | – | – | – |
| C. pulchellum (Vander Linden) | 2 | 0.5 | 0.2 | 2 | 0.7 | 0.4 | – | – | – | – | – | – |
| Enallagma cyathigerum (Charpentier) | 5 | 1.2 | 0.2 | 5 | 1.8 | 0.4 | – | – | – | – | – | – |
| Erythromma najas (Hansemann) | 1 | 0.2 | 0.1 | 1 | 0.4 | 0.2 | – | – | – | – | – | – |
| E. viridulum (Charpentier) | 1 | 0.2 | 0.1 | – | – | – | – | – | – | 1 | 6.3 | 0.5 |
| Gomphus vulgatissimus (Linnaeus) | 3 | 0.7 | 0.3 | 1 | 0.4 | 0.2 | 1 | 0.8 | 0.1 | 1 | 6.3 | 0.5 |
| Somatochlora metallica (Vander Linden) | 8 | 1.9 | 0.1 | 4 | 1.4 | 0.2 | 4 | 3.1 | 0.1 | – | – | – |
| S. flavomaculata (Vander Linden) | 1 | 0.2 | 0.1 | – | – | – | 1 | 0.8 | 0.1 | – | – | – |
| Orthetrum cancellatum (Linnaeus) | 11 | 2.6 | 0.3 | 11 | 3.9 | 0.6 | – | – | – | – | – | – |
| Crocothemis erythraea (Brullé) | 1 | 0.2 | 0.1 | 1 | 0.4 | 0.2 | – | – | – | – | – | – |
| Sympetrum danae (Sulzer) | 1 | 0.2 | 0.1 | – | – | – | 1 | 0.8 | 0.1 | – | – | – |
| S. depressiusculum (Selys) | 17 | 4.0 | 0.3 | – | – | – | 17 | 13.1 | 0.4 | – | – | – |
| S. flaveolum (Linnaeus) | 2 | 0.5 | 0.1 | 1 | 0.4 | 0.2 | 1 | 0.8 | 0.1 | – | – | – |
| S. meridionale (Selys) | 2 | 0.5 | 0.2 | – | – | – | 2 | 1.5 | 0.3 | – | – | – |
| S. sanguineum (O.F. Müller) | 31 | 7.2 | 0.5 | 8 | 2.8 | 0.4 | 23 | 17.7 | 0.7 | – | – | – |
| S. vulgatum (Linnaeus) | 16 | 3.7 | 0.4 | 8 | 2.8 | 0.6 | 8 | 6.2 | 0.3 | – | – | – |
| Total | 428 | 282 | 130 | 16 | ||||||||
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