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DATA CONCERNING THE HYDRO BIOLOGICAL CHARACTERISTICS OF DUN√ÉRENI LAKE (CONSTAN√ěA COUNTY)


CRISTINA DINU, ADINA RADU, LILIANA T√-R√-K

Issue:

SCSB, Volume X

Section:

Ecology, Limnology

Abstract:

The Dun√£reni (M√Ęrleanu) Lake is situated in the Danube‚Äôs holm, the Ostrov-Cernavod√£ sector, on the territory of the locality Dun√£reni (commune Aliman), 35 km from the town Cernavod√£ (km 319-323 on the Danube). It occupies a surface of 657 ha, from which 450 ha of water lustre. Its hydrographic basin (522 km2) collects the precipitation waters from the Dubromir Valley. The main water supply sources of the lake are: the Danube‚Äôs spring high floods which reach 7 hg, the high flood flows formed in the receiving basin in summer time and its owns springs.

Regarding the genesis and the evolution, the lake is framed in the category of the fluvial lakes formed on secondary valley which, following the processes of fluvial erosion and accumulation, joined by anastomosis at the confluence with the Danube. The lake has the configuration of a creek-depression with high and abrupt banks and the bottom relatively level on approximately 75% of its surface (G√ā¬™TESCU, 1971).

Following the hydrotechnic arrangements made in 1970, the lake became a fishery. Being an important habitat for the aquatic birds, the lake was declared natural reserve by the Governmental Resolution nr.2151/2004 (the reserve surface of 702,66 ha including also the perimetrical meadows adjacent to the lake).

Keywords:

Dun√£reni Lake, plant communities, phytoplankton, zooplankton, fish fauna.

Code [ID]:

SCSB200510V10S04A0005 [0002549]


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