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Phytoseston communities used for the assessment of running water quality - an example based on the upper vistula river. A review

100%

Bucka H.

2004

issue 4

5-26

This is a review of data that were obtained in the past and in more recent years by various authors who have often been involved in collective, interdisciplinary studies of the usefulness of phytoseston for evaluating the water quality of the Upper Vistula River. It is commonly known that drifting microflora in riverine bioseston is primarily a mixture of benthic forms that have been washed out from the bottom ? their prior habitat. A considerable contribution of allochthono-us forms were found among them. They originated from a reservoir created by river damming and also from tributaries. Generally, at the end of the 1990s at some Sites of the studied sector of the Vistula River there was intense development of potentially toxic cyanobacteria. The predominant taxa (e.g., Microcystis spp., Anabaena spp., Woronichinia naegeliana) and coccal green algae (e.g., Scenedesmus spp., Pediastrum spp.) are usually noted in eutrophic water bodies. These taxa competed with diatoms or sometimes prevailed over them in abundant populations. Since these groups were omitted from the benthic diatom index method, phytoseston analysis contributed very important additional information to the diatom index results applied by other authors.

Spatial distribution of chlorococcalean genera in the phytoseston of the we?na and nielba rivers

88%

Messyasz B.

Oceanological and Hydrobiological Studies

2003

issue 2

33-44

The chlorococcalean flora from two crossed rivers during the summer period (from July to September 2001 and 2002) was examined. Phytoseston communities were collected from the We?na and Nielba rivers before and behind the cross-rivers as well as from the central place of the cross-rivers. Species belonging to 6 dominant genera: Scenedesmus, Pediastrum, Monoraphidium, Ankistrodesmus, Coelastrum and Tetraedron were found in both rivers. At most of the stations located along the We?na and Nielba rivers after their crossing a trend of increasing green algae species richness together with an increase in the total species number of cells was observed. Furthermore, it was found that the We?na river takes over some of the Nielba phytoseston species.

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2 Oceanological and Hydrobiological Studies

1 2004

1 2003

1 Bucka H.

1 Messyasz B.

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Phytoseston communities used for the assessment of running water quality - an example based on the upper vistula river. A review

Spatial distribution of chlorococcalean genera in the phytoseston of the we?na and nielba rivers