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Effect of Buffer Zone Structure on Diversity of Aquatic Vegetation in Farmland Water Bodies

Kujawa Krzysztof, Arczyńska-Chudy Ewa, Janku Krzysztof, Mana Mostefa

Polish Journal of Ecology

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2020

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Vol. 68, nr 4

263--282

EN

Farmland water bodies (FWBs) are marginal habitats in the agricultural landscape. However, regardless of their small size, they are refuges for natural vegetation and species-rich animal assemblages. They are especially important in areas where the intensification of agricultural activities reduces the ecological quality of the landscape. The study aimed to evaluate the effect of the habitat structure of the FWB buffer zone on macrophyte association diversity in the FWBs (n = 49). As many as 175 species of vascular plants, three stoneworts, and 40 (41-49 according to Chao2 estimator) plant associations were recognized, including 19 of high conservation priority. The occurrence of threatened associations (0-5 per FWB) was not correlated with the number of common (unthreatened) ones. The most important predictors of plant diversity (at the species level and the association level) were the connection of the FWB with a watercourse (positive effect), and the distance from the FWB to the nearest built-up areas (positive effect). The results suggest that even though the high percentage cover of perennial vegetation mitigates the effect of diffused pollutions of agricultural origin on FWB biota, its significance may become low when the distance from a built-up area to FWBs is small.

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Measures of central tendency of aquatic habitat parameters : application to river macrophyte communities

Szoszkiewicz K., Kayzer D., Staniszewski R., Dawson H.

Polish Journal of Ecology

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2010

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Vol. 58, nr 4

693-706

EN

The aim of this paper is to assess usefulness of different measures when determining central tendencies which characterise the environmental requirements of living organisms. Mathematical analyses were made of the environmental parameters of river macrophyte communities which were taken as a representative pattern of different levels of biological structures. To deliver a representative dataset, botanical surveys were carried out on a range of British rivers together with environmental assessment and the plant communities groups were identified based on characteristic species according to eslished phytosociological criteria. The mean values and standard univariate medians of the revealed associations were compared with means calculated on the basis of advanced transformation and also with the rarely calculated multivariate L median. Due to high variance and asymmetrical distribution, the analyses based on the mean-value appeared to be limited in application. To avoid this disadvantage transformation to obtain normality of the dataset standardisation was proposed although even this did not fully reach a satisfactory symmetry. It was concluded that each environmental variable for each single biota must be individually treated by a suile transformation to obtain approximately normal distributions. The univariate median was very resistant to the effects of outliers but gave a flattened output of the environmental dataset making the partitioning of biological units very difficult. The multivariate L median appeared to be unaffected by outliers. It enabled to obtain considerable ordering of communities against individual environmental parameters without data transformation.

3

Biotope and selected elements of biocenosis of the post-ore flotation sediment dumping site "Gilów"

Dziubak K., Kutyna I.

Chemia i Inżynieria Ekologiczna

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2006

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Vol. 13, nr 6

477-482

EN

In the area of the post-ore flotation sediment dumping site "Gilów" research was carried out concerning plant communities and biotope of their occurrence. The reaserch included fauna observations. Samples of sediments underwent the determination of mechanical composition, pH reaction, CaC03 content, total form of elements: Fe, Mn, Cu, Pb, Ni, Co, Cd and Cr. The sediments were characterized by neutral and basic reaction values as well as a high content of heavy metals. In the area of the dumping site there occurred protected plant and animal species. Plant associations were distinguished in the research area.

PL

Na składowisku odpadów poflotacyjnych "Gilów" przeprowadzono badania dotyczące zbiorowisk roślinnych i biotopu ich występowania. Podczas realizacji badań przeprowadzono obserwacje fauny. W pobranych próbach osadów oznaczono skład granulometryczny, odczyn pH, zawartość CaCO3, ogólne formy pierwiastków: Fe, Mn, Cu, Pb, Ni, Co, Cd i Cr. Osady charakteryzują się obojętnym i zasadowym odczynem, dużą zawartością metali ciężkich. Na obszarze składowiska występują chronione gatunki roślin i zwierząt. Na badanym obiekcie wyróżniono zespoły roślinne.