<abstract xmlns="http://www.w3.org/1999/xhtml">

<p>Lake Rusałka is a shallow, artificial, strongly eutrophic reservoir. Thermal stratification is weak and comprises only about 8% of the bottom surface. In summer, the epilimnion is oversaturated with oxygen due to intensive phytoplankton growth (chlorophyll <italic>a</italic> up to 80.2 μg l<sup>-1</sup>), while conditions in the hypolimnion are anaerobic. The high concentration of ammonium nitrogen and low N:P ratio stimulated intense growth of cyanobacteria in the period from June to November. The domination of rotifers in the metazooplankton and low diversity and biomass of benthic macroinvertebrates was the cause of low top-down pressure of these organisms on the phytoplankton. The most advantageous restoration measures were identified to improve water quality and make the recreational use of the lake possible.</p>
</abstract>

Lake Rusałka is a shallow, artificial, strongly eutrophic reservoir. Thermal stratification is weak and comprises only about 8% of the bottom surface. In summer, the epilimnion is oversaturated with oxygen due to intensive phytoplankton growth (chlorophyll a up to 80.2 μg l-1), while conditions in the hypolimnion are anaerobic. The high concentration of ammonium nitrogen and low N:P ratio stimulated intense growth of cyanobacteria in the period from June to November. The domination of rotifers in the metazooplankton and low diversity and biomass of benthic macroinvertebrates was the cause of low top-down pressure of these organisms on the phytoplankton. The most advantageous restoration measures were identified to improve water quality and make the recreational use of the lake possible.

Functioning of the Lake Rusałka ecosystem in Poznań (western Poland)

Department of Water Protection, Faculty of Biology

Oceanological and Hydrobiological Studies

{"article-title":"Functioning of the Lake Rusałka ecosystem in Poznań (western Poland)"}

Lake Rusałka is a shallow, artificial, strongly eutrophic reservoir. Thermal stratification is weak and comprises only about 8% of the bottom surface. In...

Functioning of the Lake Rusałka ecosystem in Poznań (western Poland)

Publié en ligne: 29 sept. 2010

Pages: 65 - 80

DOI: https://doi.org/10.2478/v10009-010-0040-6

Mots clés
shallow lake, water bloom, cyanobacteria, phytoplankton, zooplankton, macroinvertebrates

This content is open access.

Functioning of the Lake Rusałka ecosystem in Poznań (western Poland)

Publié en ligne: 29 sept. 2010

Pages: 65 - 80

DOI: https://doi.org/10.2478/v10009-010-0040-6

Mots clésshallow lake, water bloom, cyanobacteria, phytoplankton, zooplankton, macroinvertebrates

This content is open access.

Mots clés
shallow lake, water bloom, cyanobacteria, phytoplankton, zooplankton, macroinvertebrates