REAL

Benthic algal investigations in the Danube river and some of its main tributaries from Germany to Hungary

Ács, Éva and Szabó-Taylor, Katalin and Kiss, Keve Tihamér (2003) Benthic algal investigations in the Danube river and some of its main tributaries from Germany to Hungary. Biologia (Bratislava), 58 (4). pp. 545-554. ISSN 0006-3088 (print), 1336-9563 (online)

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Abstract

The epilithic algae in the river Danube and some of its main tributaries were studied. Quantitative samples were taken from the upper part of stones of the shoreline of rivers in August 2000 and from the side in current line of stones in August and October 2001. Samples in 2000 were collected from the Danube from Ingolstadt (Germany) to God (Hungary), in August 2001 from Nasgenstadt (Germany) to Baja (Hungary), in October 2001 from Bratislava (Slovakia) to Mohacs (Hungary), and also from the mouth of some major tributaries of Danube river. The most abundant group of algae was the diatoms, specifically the Pennales. In some samples the proportion of Chlorophyta was more than 20%. In 2000 the proportion of Cyanobacteria was also high in many samples because samples were taken from the upper part of stones. In some samples the proportion of the Centrales was surprisingly high. On the basis of diatom indices calculated from the relative abundance of diatoms using the OMNIDIA software, the water quality of the German-Austrian-Slovak part of the Danube is generally good, whereas that of the Hungarian part is moderate. Some evidence of organic pollution or more was found at Melk (in August 2000), Gabcikovo (in October 2001), Komarom (in August 2001) and God (in August and October 2001). The water quality of the rivers Isar, Enns, (in August 2000 and 2001), Iller, Lech, Danube-Main Channel, Vah (in August 2001) was good but of other investigated tributaries moderate. Some evidence of organic pollution was found in the Morava river in August 2000, Mosoni Danube in August 2001 and Hron in August and October 2001. The percentage of pollution tolerant taxa indicated a high level of organic pollution also in the Ipel river in August and October 2001.

Item Type: Article
Subjects: Q Science / természettudomány > QE Geology / földtudományok > QE08 Hydrosphere. Hydrology / hidroszféra, hidrológia
Q Science / természettudomány > QH Natural history / természetrajz > QH301 Biology / biológia
Depositing User: Erika Bilicsi
Date Deposited: 20 Feb 2013 14:07
Last Modified: 20 Feb 2013 14:07
URI: http://real.mtak.hu/id/eprint/4242

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