Winter blooms of centric diatoms in the River Danube and in its side-arms near Budapest (Hungary)

K. Kiss, S. I. Genkal

Research output: Contribution to journalArticle

36 Citations (Scopus)

Abstract

Although the phytoplankton in large eutrophic rivers is often abundant, data on winter populations are scarce. Phytoplankton has been sampled since 1979 in the main arm of the River Danube at Göd (20 km north from Budapest), and also from two side-arms, upstream and downstream of Budapest. Analysis of winter samples has shown high population densities of phytoplankton 'blooms' on several occasions. In general centric diatoms (20 taxa determined) were abundant and dominant during the blooms. The most abundant taxon in November was Stephanodiscus hantzschii f. tenuis, and in February S. minutulus. The most important factors in forming winter blooms of Centrales are rich nutrient supply, slow current speed and high transparency. Massive phytoplankton blooms occurred several times between November and March in the small side-arm at Göd. In the large side-arm downstream of Budapest (Soroksári-Dung) large blooms of centric diatoms were found in winter (often under ice, which was covered by snow in many cases). Here S. hantzschii f. tenuis and S. minutulus were the most abundant species.

Original languageEnglish
Pages (from-to)317-325
Number of pages9
JournalHydrobiologia
Volume269-270
Issue number1
DOIs
Publication statusPublished - Oct 1993

Fingerprint

Danube River
Phytoplankton
Hungary
algal blooms
algal bloom
diatom
Rivers
phytoplankton
winter
river
Stephanodiscus
Bacillariophyceae
Snow
snow
Transparency
Nutrients
Ice
population density
ice
transparency

Keywords

  • Bacillariophyceae
  • Centrales
  • phytoplankton bloom
  • winter bloom

ASJC Scopus subject areas

  • Water Science and Technology
  • Pollution
  • Environmental Science(all)
  • Oceanography
  • Aquatic Science

Cite this

Winter blooms of centric diatoms in the River Danube and in its side-arms near Budapest (Hungary). / Kiss, K.; Genkal, S. I.

In: Hydrobiologia, Vol. 269-270, No. 1, 10.1993, p. 317-325.

Research output: Contribution to journalArticle

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