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The importance of peat excavation water bodies for biodiversity and conservation: a case of three Unionidae [Bivalvia] mussel species

100%

Ozgo M., Abraszewska A.

Polish Journal of Ecology

2009

tom 57

nr 4

793-798

This paper presents populations of Anodonta cygnaea (L.), Anodonta anatina (L.) and Unio pictorum (L.) inhabiting an artificial pond (area 0.3 ha, depth 4 m) formed at a peat excavation site 13 years prior to the collection of the data. The mussels probably colonized the pond as glochidia attached to host fish introduced for angling or migrating with flood waters. The mussel populations were characterized by high densities, high average and maximum shell lengths and high proportions of young individuals. Our study shows that man-made ponds can become favorable habitats for freshwater mussels, and that relatively short time is needed to establish their viable populations. Active conservation of unionid mussels in man-made habitats may require human help at the dispersal stage.

Sinanodonta woodiana [Lea, 1834] [Mollusca] - a new mussel species in Poland: occurrence and habitat preferences in a heated lake system

100%

Kraszewski A., Zdanowski B.

Polish Journal of Ecology

2007

tom 55

nr 2

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 (10–30ºC), 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 cooling reservoir where the water was the warmest. Population density sometimes exceeded 60 ind m⁻², while mussel biomass (including the shell) reached as much as 25 kg m⁻².

Ograniczanie wyników

2 Polish Journal of Ecology

1 Abraszewska A.

1 Kraszewski A.

1 Ozgo M.

1 Zdanowski B.

1 2009

1 2007

Wyniki wyszukiwania

The importance of peat excavation water bodies for biodiversity and conservation: a case of three Unionidae [Bivalvia] mussel species

Sinanodonta woodiana [Lea, 1834] [Mollusca] - a new mussel species in Poland: occurrence and habitat preferences in a heated lake system