Open Access
Table 2
List of all recorded NIMS in four major large Croatian rivers, with their origin and densities (min, average, max) per m2 within each river (*first record in Croatia; bold species: nine most widespread and abundant NIMS; adensity calculated without site DR3).
| Taxa group | Species | Origin | Recorded at rivers and sites: | Density (ind. m−2) |
|---|---|---|---|---|
|
|
||||
| Average (min–max) | ||||
| Turbellaria | Dendrocoelum romanodanubiale* | Ponto-Caspian | Drava (2): DR13, DR14 | 10 (5–14) |
| Oligochaeta | Branchiura sowerbyi | Southern Asia | Drava (6): DR4, DR7, DR13, DR14, DR15, DR18 | 70 (10–207) |
| Sava (5): SA13, SA14, SA17, SA2O, SA21 | 5 (1–14) | |||
| Potamothrix moldaviensis * | Ponto-Caspian | Drava (1): DR13 | 5 (5–5) | |
| Danube (1): DA3 | ||||
| Polychaeta | Hypania invalida | Ponto-Caspian | Drava (3): DR15, DR16, DR17 | 24 (10–43) |
| Danube (3): DA1, DA3, DA4 | 3 (2–4) | |||
| Hirudinea | Caspiobdella fadejewi * | Ponto-Caspian | Sava (2): SA6, SA9 | 9 (5–12) |
| Gastropoda | Potamopyrgus antipodarum | New Zealand | Mura (1): MU2 | 10 (10–10) |
| Drava (11): DR3, DR4, D4, DR6, DR8, DR9, DR10, DR11, DR12, DR13, DR14 | 87a (4–127.762) | |||
| Physella acuta | North America | Drava (2): DR13, DR14 | 8 (5–15) | |
| Sava (1): SA17 | 2 (2–2) | |||
| Danube (1): DA4 | 1 (1–1) | |||
| Bivalvia | Corbicula fluminea | East Asia | Drava (8): DR13, DR14, DR15, DR16, DR17, DR18, DR19, DR20 | 282 (6–1084) |
| Sava (16): SA5, SA7, SA8, SA9, SA10, SA11, SA12, SA13, SA14, SA15, SA16, SA17, SA18, SA19, SA20, SA21 | 54 (1–559) | |||
| Danube (3): DA1, DA2, DA4 | 41 (6–91) | |||
| Dreissena polymorpha | Ponto-Caspian | Drava (17): DR1, DR4, DR6, DR7, DR8, DR9, DR10, DR11, DR12, DR13, DR14, DR15, DR16, DR17, DR18, DR19, DR20 | 424 (24–2496) | |
| Danube (4): DA1, DA2, DA3, DA4 | 26 (6–75) | |||
| Dreissena bugensis | Ponto-Caspian | Danube (4): DA1, DA2, DA3, DA4 | 15 (2–52) | |
| Sinanodonta woodiana | East Asia | Drava (1): DR18 | 3 (3–3) | |
| Sava (2): SA6, SA10 | 2 (1–2) | |||
| Danube (1): DA2 | 2 (2–2) | |||
| Amphipoda | Chelicorophium sowinskyi | Ponto-Caspian | Drava (1): DR18 | 11 (11–11) |
| Sava (14): SA8, SA9, SA10, SA11, SA12, SA13, SA14, SA15, SA16, SA17, SA18, SA19, SA20, SA21, | 338 (4–1568) | |||
| Chelicorophium curvispinum | Ponto-Caspian | Drava (11): DR10, DR11, DR12, DR13, DR14, DR15, DR16, DR17, DR18, DR19, DR20 | 2607 (3–7964) | |
| Sava (4): SA8, SA9, SA10, SA17 | 22 (7–50) | |||
| Danube (4): DA1, DA2, DA3, DA4 | 132 (95–191) | |||
| Chelicorophium robustum | Ponto-Caspian | Danube (3): DA1, DA2, DA3 | 18 (4–33) | |
| Dikerogammarus bispinosus | Ponto-Caspian | Danube (1): DA2 | 4 (4–4) | |
| Dikerogammarus haemobaphes | Ponto-Caspian | Sava (14): SA7, SA8, SA10, SA11, SA12, SA13, SA14, SA15, SA16, SA17, SA18, SA19, SA20, SA21 | 218 (3–626) | |
| Danube (1): DA1 | 2 (2–2) | |||
| Dikerogammarus villosus | Ponto-Caspian | Drava (15): DR5, DR6, DR8, DR9, DR10, DR11, DR12, DR13, DR14, DR15, DR16, DR17, DR18, DR19, DR20 | 809 (16–3307) | |
| Sava (3): SA8, SA9, SA15 | 47 (23–91) | |||
| Danube (4): DA1, DA2, DA3, DA4 | 128 (57–204) | |||
| Echinogammarus ischnus | Ponto-Caspian | Drava (6): DR14, DR15, DR16, DR17, DR19, DR20 | 93 (3–278) | |
| Danube (3): DA1, DA3, DA4 | 6 (5–7) | |||
| Obesogammarus obesus | Ponto-Caspian | Danube (3): DA1, DA2, DA4 | 18 (6–36) | |
| Isopoda | Jaera istri | Ponto-Caspian | Drava (9): DR10, DR11, DR12, DR14, DR15, DR16, DR17, DR18, DR19 | 394 (7–1459) |
| Sava (12): SA8, SA9, SA10, SA11, SA12, SA14, SA16, SA17, SA18, SA19, SA20, SA21 | 72 (3–391) | |||
| Danube (3): DA1, DA3, DA4 | 81 (2–238) | |||
| Mysidacea | Limnomysis benedeni | Ponto-Caspian | Drava (2): DR19, DR20 | 9 (1–16) |
| Danube (2): DA1, DA3 | 2 (1–2) |
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