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Relationship between plankton assemblages and habitat characteristics of stands of Typha angustifolia and Chara hispida in Lake Wielkowiejskie

Celewicz-Gołdyn S., Klimko M., Kuczyńska-Kippen N., Nagengast B.

Oceanological and Hydrobiological Studies

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2010

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Vol. 39, No.1

127-135

EN

The results of investigations performed in Lake Wielkowiejskie showed the influence of macrophyte architecture, understood as plant density, on the structure of plankton communities as well as the habitat preferences of particular species in both seasonal and spatial aspects.

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Influence of Ceratophyllum demersum L. on phytoplankton structure in a shallow eutrophic lake

Celewicz-Gołdyn S.

Oceanological and Hydrobiological Studies

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2010

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Vol. 39, No.3

121-128

EN

Phycological analyses were conducted in the shallow, eutrophic Lake Rosnowskie Duże (western Poland). Water samples were collected in 2002 and 2003 during the growing season from the submerged vegetation zone (Ceratophyllum demersum L.) and comparatively from the emergent vegetation zone (Typha angustifolia L.) and the pelagic zone. Phytoplankton was dominated by Chlorophyta, Bacillariophyceae, and Cyanoprokaryota. In comparison with other zones, the highest values of abundance and biomass of Chlorophyta were recorded in the submerged vegetation zone. Additionally, Ceratophyllum demersum was found to inhibit diatom development, which is probably connected with the secretion of allelopathic substances by this plant. The aim of the current study was to analyze the influence of Ceratophyllum demersum L. on the structure of phytoplankton in a shallow, eutrophic lake.

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Zooplankton community structure within various macrophyte stands of a small water body in relation to seasonal changes in water level

Kuczyńska-Kippen N., Nagengast B., Celewicz-Gołdyn S., Klimko M.

Oceanological and Hydrobiological Studies

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2009

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Vol. 38, No.3

125-133

EN

Different morphological features of particular water bodies, physical and chemical factors of their waters and sediments will have an impact on the development of specific aquatic vegetation types, which in turn will affect the creation of specific communities of plankton organisms. Therefore the aim of this study was to analyse the quantity and quality changes of macrophyte structure in relation to the lowering of the water level. Furthermore, the relationship between zooplankton community densities and environmental parameters was studied. Another aspect of the study was to investigate the similarity of the zooplankton communities of particular sampling stations in the three examined seasons. The study was carried out on Dąbrówka water body, a shallow and macrophyte-dominated pond, situated 10 km west of Poznań, Wielkopolska region, western Poland. The examination was conducted in the three seasons: spring, summer and autumn. The results revealed that during one vegetative period, including three seasons – spring, summer and autumn, three different layouts of aquatic vegetation were obtained, which reflected a significant transformation in the macrophyte cover. Along with the lowering of the water level the structural changes, especially in the case of submerged vegetation were recorded, which in each season was represented by different dominating species. Only three significant correlations between zooplankton densities and environmental factors observed. Negative relationship concerned total nitrogen and two positive related to biometric parameters of the macrophyte habitat (plant biomass plant stem volume). The plant biomass was a predictor of cladoceran abundance and plant stem volume referred to rotifers, which may reflect the complexity of the aquatic plant habitat, indirectly relating to the effectiveness of the macrophyte stand as anti-predator refuge. The analysis of the similarity of the zooplankton communities of particular sampling stations in the three examined seasons did not reveal any clear relationship, either in relation to a particular season or a sampling station. The participation of eutrophic species was highest in the spring and lowest during the autumn season. The open water zone possessed the highest participation of these species compared to the macrophyte zones.