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Zooplankton structure in architecturally differentiated macrophyte habitats of shallow lakes in the Wielkopolska Region, Poland

Kuczyńska-Kippen N.

Oceanological and Hydrobiological Studies

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2006

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Vol. 35, No.2

179-191

EN

The aim of this examination was to study the impact of the physical parameters, understood as spatial and morphological features, of two macrophyte habitats created by Chara tomentosa and Typha angustifolia on the Rotifera and Crustacea communities of three shallow lakes with extensive macrophyte cover. There were 161 zooplankton species in total identified from three lakes, with over 60% of species common among all lakes. Species richness varied between the sampling stations, with lowest values within the open water zone and highest among macrophyte stands. Significant differences in zooplankton densities between particular stations for all groups of zooplankton were observed, with the highest values within the most diverse and complex habitat – the Chara bed. Furthermore, the distribution of pelagic species between particular stations differed significantly in the case of copepods, with the highest abundance also in the stonewort beds.

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Abundance and morphotype diversity of surface bacterioplankton along the Gdynia - brest transect

Żmuda M. J.

Oceanological and Hydrobiological Studies

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2005

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Vol. 34, No.4

3--17

EN

Abundance, biomass and morphotype diversity of bacterioplankton were analyzed in surface samples collected on a transect from Gdynia (Poland) to Brest (France) between 5 and 17 October, 2002. The total bacterial number ranged from 1.52 x 105 š 7.0 x 103 ml-1 (SE) to 4.08 x 106 š 3.1 x 105 ml-1. Samples from the Baltic Sea showed both the highest number of bacteria and the largest variability. Total bacterial biomass ranged from 5.45 š 0.99 to 128.17 š 13.58 ěg C l-1. The dominant morphotype were rods (82.4% to 95.7%) especially those with average cell volume below 0.1 ěm3. Regional differences in the average cell volume ranged from 0.099 to 0.382 ěm3. Autotrophic bacteria comprised on average 13.5 % of total bacterioplankton biomass, but increased to 48% at the west side of the English Channel. The high bacterial abundances discussed here shed light on the importance of the ocean surface as a habitat for prokaryotes and as a reservoir of bacterial biomass.

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Horizontal distribution of phytoplankton and zooplankton from the littoral towards open waters under wind stress

Żurek R., Bucka H.

Oceanological and Hydrobiological Studies

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2004

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Vol. 33, No. 3

69--81

EN

The distribution of algae and zooplankton on two transects across reed and Polygonum stands was observed. The algal community in the Polygonum stand had a mosaic structure mainly comprised of green algae plus desmids and diatoms (Pediastrum simplex, Scenedesmus acutus, Closterium ehrenbergii), whereas blue-green algae (cyanobacteria) Microcystis aeruginosa and Woronichinia naegeliana dominated from the reed boundary towards open waters. Some species, such as Euchlanis dilatata, prefer to be associated with plants, while others, like Synchaeta kitina, are more numerous in open waters. On a windward shore, wind at a velocity of 4 – 5 m s-1 caused a slow back current from 8 to 18 m h-1. Movements of water were sometimes linear, but at times they developed in two dimensions.

4

Algal communities of humic acid sites: biomass and diversity in lake water versus peat-mat water

Luścińska M., Soska R.

Polish Journal of Ecology

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1998

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Vol. 46, no 2

123-135

EN

In the water of a humic lake, and in the peat-bog surrounding it, there were recorded 70 taxa of algae: Cyanophyta, Pyrrophyta, Cryptophyta, Chrysophyta, Euglenophyta and Chlorophyta. In the peat-bog water a higher variety of species and algal biomass was observed than in the lake water. The relatively low biomass of algae in the lake water, was produced by few nanoplanktonic species, i.e. mixotrophic flagellates from Cryptophyta, Pyrrophyta and Chrysophyta.The comparatively higher biomass was formed by peat-bog algae, both in the nearest neighbourhood of the lake and in the bog pine forest. Community of algae from the peat-bog differs also according to the distance from the lake.

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Phytoplankton and zooplankton in the zones of rushes and submerged vegetation of Lake Lubaskie Duże

Kuczyńska-Kippen N., Messyasz B.

Oceanological Studies

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1998

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Vol. 27, No. 2

23-27

EN

The examined Lake Lubaskie Duze covering the area of 41.5 ha is a dimictic lake a mean depth of 12 m (max. depth 16 m). The systematic observations of phyto- and zooplankton changes together with the selected physico-chemical parameters of water which were carried out for this lake during 1991-1996 showed its mesotrophic character declining towards eutrophy . In 1996, the research was expanded to the analyses of the plankton dynamics in the zones of rushes and submerged vegetation. The purpose of this research was to examine qualitative and quantitative changes of plankton inhabiting various habitats. The samples were collected along the transect starting from rushes to the area of open water (pelagic zone). The sampling was performe at four stations: station 1 - zone of rushes, community of reed and cattail; station 2 - zone of open water area between stations 1 and 3; station 3 - zone of submerged vegetation, community of hornwort; station 4 - open water (pelagic zone). Taking into consideration the spatial distribution of plankton, the differences in the taxonomic groups inhabiting the zones along the transect were noted. In the zone of submerged vegetation, the higher species diversity and greater numbers of specimens were observed than in the zone of rushes.