Wyniki wyszukiwania - BazTech

Ograniczanie wyników

2 Polish Journal of Ecology

Znaleziono wyników: 2

Liczba wyników na stronie

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych: Unionidae

Sortuj według:

Ogranicz wyniki do:

The Invasive Asian Clam Corbicula fluminea in Polish Rivers : The Importance of Thermal Discharge from Power Plants for Its Spread

Urbańska M., Andrzejewski W., Riccardi N., Gierszal H., Golski J.

Polish Journal of Ecology

2018

Vol. 66, nr 1

70--75

So far in Poland, the Asian clam Corbicula fluminea has been reported from the Oder (Odra) and Vistula River. Its new population has been discovered in the Warta-Gopło Canal in Konin (central Poland), where water temperature can reach 34°C, as the canal is a part of a power plant lake cooling system. The spatial distribution of C. fluminea was found to be very uneven and that is probably why this species was not found during earlier research. The highest density of C. fluminea was 78 ind.·m-2 at the site where water flow was the fastest (2.49 m·s-1), providing sufficient oxygenation of the water. The results suggest that existing information about the distribution of C. fluminea may be far from complete because the clam can be present also in the habitats that were not regarded as suitable for the species according to earlier reports, and therefore have not been monitored for its presence.

Sinanodonta woodiana (Lea, 1834) (Mollusca) - a new mussel species in Poland: occurence and habitat preferences in a heated lake system

Kraszewski A., Zdanowski B.

Polish Journal of Ecology

2007

Vol. 55, nr 2

337-356

In the mid 1980s the southeast Asian mussel Sinanodonta woodiana (Lea, 1834) was introduced into a lake system that is heated by power plant discharge waters (near Konin in central Poland) along with fish stocking material from Hungary. Currently, this species is abundant in the littoral zones of the five lakes in the system, the initial water cooling reservoir, as well as most of the intake and discharge canals. This species prefers a habitat with a moderate water flow rate (0.05-0.30 m s[^-1]) and a relatively high water temperature (10-30 [degree]C), and it usually forms aggregations. It avoids strong water turbulence and coarse sediments, although it does occur sporadically in the direct vicinity of water intake pumps and water discharge as well as on gravel substrates. The largest aggregation of Sinanodonta woodiana occurred at depths of 1.5-2.5 m. The highest number and biomass of this species was noted in the discharge canal and initial cool.ing reservoir where the water was thee warmest. Population density sometimes exceeded 60 ind m[^-2], while mussel biomass (including the shell) reached as much as 25 kg m[^-2].