Figure 1
Distribution map of Corbicula fluminea sampling stations in the stretch of the Vistula River (ca 210 km long) between Opatowiec and Puławy. Sampling station no. 22 where samples were collected along the transects is indicated by a larger font size
Figure 2
Distribution of C. fluminea along the transects in the Vistula channel at sampling station no. 22
Table 1
Occurrence of Corbicula fluminea in the stretch (ca 210 km long) of the Vistula River between Opatowiec and Puławy
| Sampling station no. | Nearest locality name | Coordinates | Date of the first record/density measurement | Number of samples | Mean density at occupied sites [ind. per m2] | ± SD | Description of sampling station |
|---|---|---|---|---|---|---|---|
| 1 | Opatowiec – ferry | 50o14′23.93″N 20o43′41.25″E | 9 February 2016 9 February 2016 | 7 | 2.0** | ± 1.63 | the left bank of the Vistula above the ferry route in Opatowiec, muddy-gravel bottom, regulated river channel |
| 2 | Połaniec – heated water drain | 50o26′34.63″N 21o22′3.82″E | 1 September 2011 3 September 2016 | 74.4 | ± 16.46 | the left bank of the channel with stone lining, discharging heated water from the power plant | |
| 3 | Tursko Małe – the Vistula below the mouth of the power station channel | 50o26′27.58″N 21o22′40.71″E | 6 | 142.0** | ±46.89 | the left bank of the Vistula with stone lining, ca 100 m below the mouth of the channel discharging heated water from the power plant, bottom covered with stones | |
| 4 | Niekurza | 50o26′22.57″N 21223′41.92″E | 3 September 2016 3 September 2016 | 6694.5** | ± 1458.21 | the firth between the groyne field on the left bank of the Vistula opposite of the Wistoka mouth, muddy-sandy bottom | |
| 5 | Tarnobrzeg (Siarkopol) – bridge | 50o31′15.65″N 21236′11.98″E | 9 February 2016 9 February 2016 | 37.0 | ± 10.32 | sandy shoal in the river channel under the bridge (national road number 9) | |
| 6 | Ciszyca – ferry | 50o34′22.33″N 21o39′27.11″E | 6.0 | ± 3.58 | the left bank of the Vistula at the groyne field, muddy-gravel bottom | ||
| 7 | Sandomierz – bridge | 50o40′29.93″N 21o45′26.34″E | 7 June 2014 2 September 2016 | 7 | 1.9 | ± 1.77 | |
| 8 | Kamień Łukawski | 50o41′2.85″N 21o48′8.85″E | 6 June 2014 2 September 2016 | 6.0 | ± 2.0 | sand banks or sandbars and shoal water in the river channel | |
| 9 | Kępa Chwatowska – sandbar 1 | 50o45′36.2″N 21o50′30.1″E | 25 May 2012 2 September 2016 | 6 | 107.2 | ± 8.52 | |
| 10 | Kępa Chwałowska – sandbar 2 | 50o45′48.2″N 21o50′41.9″E | 84.2 | ± 14.03 | |||
| 11 | Kępa Chwałowska – sandbar 3 | 50o45′57.99″N 21o50′47.85″E | 11 June 2014 2 September 2016 | 108.3 | ± 93.39 | ||
| 12 | Kępa Chwałowska – sandbar 4 | 50o46′6.43″N 21o50′55.06″E | 84.8 | ± 37.93 | |||
| 13 | Winiary | 50o46′48.1″N 21o51′24.1″E | 25 May 2012 1 September 2016 | 23.3 | ± 8.09 | ||
| 14 | Popowice – sandbar 1 | 50o47′13.9″N 21o51′44.13″E | 17 June 2014 1 September 2016 | 19.0 | ± 2.61 | ||
| 15 | Popowice – sandbar 2 | 50o47′30.5″N 21o51′36.6″E | 25 May 2012 1 September 2016 | 7 | 16.0 | ± 7.53 | |
| 16 | Popowice – sandbar 3 | 50o47′53.07″N 21o51′42.34″E | 17 June 2014 1 September 2016 | 6 | 16.3 | ± 12.75 | |
| 17 | Zawichost – ferry | 50o48′20.77″N 21o51′48.66″E | 11.5 | ± 1.97 | the firth between groyne fields on the left bank of the Vistula, muddy-sandy bottom | ||
| 18 | Piotrowice – landing | 50o50′18.73″N 21o50′22.62″E | 6 June 2014 1 September 2016 | 7 | 11.9 | ± 3.39 | the left bank of the Vistula at the groyne field, muddy-gravel bottom |
| 19 | Piotrowice – passage on road 759 | 50o50′37.94″N 21o50′26.05″E | 6 | 10.8 | ± 5.12 | ||
| 20 | Opoka Duża – sandbar 1 | 50o51′8.62″N 21o50′41.53″E | 8 May 2014 1 September 2016 | 12.5 | ± 3.94 | sand banks or sandbars and shoal water in the river channel | |
| 21 | Opoka Duża – sandbar 2 | 50o51′31.46″N 21o50′58.17″E | 11 June 2014 1 September 2016 | 20.3 | ± 8.24 | ||
| 22 | Opoka Duża – sandbar 3 | 50o52′3.77″N 21o50′54.96″E | 11 June 2014 11 June 2014 | 42* | 17.8** | ± 16.74 | |
| 23 | Annopol – bridge | 50o52′55.95″N 21o50′9.04″E | 11 July 2014 1 September 2016 | 6 | 11.5 | ± 5.13 | the firth between groyne fields on the right bank of the Vistula, muddy-sandy bottom |
| 24 | Józefów | 512 2′32.29″N 21o49′37.14″E | 2 September 2016 2 September 2016 | 7 | 4.0** | ± 2.16 | the side channel on the right bank of the Vistula |
| 25 | Kłudzie – ferry | 51o 9′17.90″N 21o46′46.02″E | 6 | 88.0** | ± 11.93 | the left bank, gravel bottom, Corbicula in sand under a layer of gravel and small stones | |
| 26 | Nasiłów – ferry | 51o21′11.56″N 21o58′55.90″E | 3 September 2016 3 September 2016 | 24.0** | ± 4.15 | sandbar on the left bank of the Vistula | |
| 27 | Puławy | 51o24′38.38″N 21o56′33.03″E | 2.8** | ± 1.72 | the left bank of the Vistula at the groyne field, sandy bottom |
** density and shell length measured in 2016 and shown in Fig. 4.
** density and shell length measured in 2016 and shown in Fig. 4.
** density and shell length measured in 2016 and shown in Fig. 4.
** density and shell length measured in 2016 and shown in Fig. 4.
** density and shell length measured in 2016 and shown in Fig. 4.
** density and shell length measured in 2016 and shown in Fig. 4.
** density and shell length measured in 2016 and shown in Fig. 4.
** density and shell length measured in 2016 and shown in Fig. 4.
Figure 3
Density (ind. m-2) and the maximum shell length (mm) of C. fluminea at eight sampling stations in the Vistula depending on the distance (km) from the mouth of the power plant channel with heated water
Figure 4
Percentages of C. fluminea in size classes in the Vistula channel near the Sanna river mouth (sampling station no. 22; clams were grouped into shell length classes differing by 1 mm); mean 8.7 mm, SD ± 2.91, n = 288
Table 2
Checklist of Mollusca species recorded in the studied reach of the Vistula River
| No. | species | previous studies (Kownacki 1999: the reach of the river from Kraków to Warszawa) | the current study (2012–16): the reach of the river from Opatowiec to Puławy, and Maćkiewicz 2013: the Vistula in Kraków (in brackets) |
|---|---|---|---|
| GASTROPODA | |||
| 1 | Viviparus viviparus | + | + |
| 2 | Potamopyrgus antipodarum | – | + (+) |
| 3 | Valvata piscinalis | + | + |
| 4 | Bithynia sp./Bithynia tentaculata | + | + (+) |
| 5 | Physella acuta | + | + |
| 6 | Lymnaea stagnalis | + | + |
| 7 | Galba truncatula | + | + |
| 8 | Radix auricularia | + | + |
| 9 | Radix balthica | + | + |
| 10 | Planorbis planorbis | + | + (+) |
| 11 | Bathyomphalus contortus | + | + |
| 12 | Anisus vortex | + | + |
| 13 | Gyraulus albus | + | + |
| 14 | Planorbarius corneus | + | + |
| 15 | Ancylus fluviatilis | + | + |
| BIVALVIA | |||
| 16 | Anodonta anatina | + | + (+) |
| 17 | Unio pictorum | + | + |
| 18 | Unio tumidus | – | + |
| 19 | Unio crassus | + | + (+) |
| 20 | Corbicula fluminea | – | + (+) |
| 21 | Dreissena polymorpha | – | + |
| 22 | Sinanodonta woodiana | – | + |
| 23 | Pseudanodonta complanata | + | – |
| 24 | Anodonta cygnea | + | + |
| 25 | Sphaerium corneum | – | + (+) |
| 26 | Pisidium sp. | – | + |
| Total number of taxa | 19 | 25 | |
[i] “+” - indicates species present; “−” - indicates species absent