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Ecology of rare water plant communities in lakes of north-eastern Poland

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Jablonska E., Klosowski S.

Acta Societatis Botanicorum Poloniae

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2012

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tom 81

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nr 1

Habitat studies were conducted on three rare plant communities dominated by Nuphar pumila, Nymphaea candida and Hydrilla verticillata in lakes of north-eastern Poland. The comparison of habitat properties of these three types of phytocoenoses with those of Nuphar lutea common in the area under study was also performed. It was demonstrated that the plant communities studied were ecologically distinct. The habitats of the phytocoenoses of N. pumila differed most significantly from those of the other phytocoenoses. They often inhabited softer waters poor in Mg2+, dissolved SiO2, but rich in total Fe, PO43−, NO3−, and were associated with acidic substrates containing lower levels of Ca2+ and Na+, but greater amounts of total Fe and NO3−. The differences in the habitats of H. verticillata and N. candida phytocoenoses were most pronounced in the case of four properties of water: Na+, K+, Cl−, and Mg+. Their values were lower in waters of the H. verticillata phytocoenoses. The habitats of all the three types of rare phytocoenoses differed considerably from those of N. lutea. The most significant differences were found between the N. lutea and N. pumila phytocoenoses and the smallest differences were between the patches of N. lutea and N. candida. The properties of water were more important in differentiating the habitats of the phytocoenoses studied than the substrate properties. Due to alkalization and increase in water hardness in the lakes studied the stands of N. pumila are among the most threatened. The patches of N. candida and H. verticillata, which occur in waters with a wider range of hardness and tolerating a slight increase in trophy, can still continue to persist in the lakes for a long time.

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Factors differentiating the habitats occupied by phytocoenoses of Phragmitetum communis [Gams 1927] Schmale 1939 in lakes of Wielkopolska Region

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Pelechaty M., Burchardt L., Siepak J.

Polish Journal of Environmental Studies

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2000

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tom 09

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nr 5

409-417

In the summer seasons of the years 1996-1998 habitat studies of 60 phytocoenoses of Phragmitetum communis in 30 lakes of Wielkopolska region were carried out. The aim of the study was a comparison of two groups of phytocoenoses exposed to different effects of wind (and waves) and two other groups subjected to a different degree of anthropopressure in respect to 28 properties of water and 23 properties of substrate. Results were expected to answer the question whether the phytocoenoses of this community reveal an internal ecological variability (habitat and floristic) in the local scale as well as to determine which of the two factors has a more important differentiating effect on the phytocoenoses and their habitats.

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Influence of superabsorbents on the physical properties of horticultural substrates

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Martyn W., Szot P.

International Agrophysics

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2001

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tom 15

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nr 2

Ograniczanie wyników

1 Acta Societatis Botanicorum Poloniae

1 International Agrophysics

1 Polish Journal of Environmental Studies

1 Burchardt L.

1 Jablonska E.

1 Klosowski S.

1 Martyn W.

1 Pelechaty M.

1 Siepak J.

1 Szot P.

1 2012

1 2001

1 2000

Ecology of rare water plant communities in lakes of north-eastern Poland

Factors differentiating the habitats occupied by phytocoenoses of Phragmitetum communis [Gams 1927] Schmale 1939 in lakes of Wielkopolska Region

Influence of superabsorbents on the physical properties of horticultural substrates