Table 4
Relative abundance (%) of alien versus native macroinvertebrates in benthic fauna at the sites where H. invalida occurred.
| Higher taxa | Species | O1 | O1 | O2 | KG1 | |||
|---|---|---|---|---|---|---|---|---|
| 2017 | 2018 | 2017 | 2018 | 2017 | 2018 | 2017 | ||
| depth <1 m | depth >1 m | depth >1 m | depth <1 m | |||||
| Polychaeta | Hypania invalida | 2.7 | 0.2 | 13.2 | 1.4 | 0.2 | 7.3 | 0.8 |
| Laonome xeprovala | 7.0 | 1.1 | 7.3 | 2.8 | 2.2 | 0.1 | ||
| Oligochaeta | Psammoryctides barbatus | 0.3 | 0.5 | 0.1 | 0.1 | |||
| Branchiura sowerbyi | 0.2 | 0.3 | ||||||
| Potamothrix moldaviensis | 0.3 | 0.05 | ||||||
| Amphipoda | Chelicorophium curvispinum | 9.7 | 0.4 | 1.2 | 2.5 | 0.7 | ||
| Dikerogammarus haemobaphes | 0.1 | 0.04 | 0.02 | |||||
| Dikerogammarus villosus | 12.4 | 1.0 | 1.1 | 0.1 | 0.7 | 0.1 | 1.3 | |
| Gammarus tigrinus | 2.5 | 55.8 | 0.5 | 11.2 | 1.0 | 6.3 | 43.1 | |
| Gastropoda | Potamopyrgus antipodarum | 24.9 | 6.0 | 37.7 | 15.0 | 5.0 | 0.3 | |
| Physa acuta | 1.1 | 1.9 | ||||||
| Bivalvia | Corbicula fluminea | 0.2 | 0.2 | 5.1 | 0.4 | 0.8 | 0.1 | |
| Dreissena polymorpha | 1.5 | 1.6 | 7.7 | 0.2 | 35.6 | |||
| Alien species | 62.5 | 69.2 | 73.9 | 18.7 | 18.8 | 20.9 | 81.2 | |
| Native species | 37.5 | 30.8 | 26.1 | 81.3 | 81.2 | 79.1 | 18.8 | |
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