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Assessment of habitat conditions using Self-Organizing Feature Maps for reintroduction/introduction of Aldrovanda vesiculosa L. in Poland

100%

Kosiba P., Mroz L., Kaminski R.

Acta Societatis Botanicorum Poloniae

2011

tom 80

nr 2

The study objects were Aldrovanda vesiculosa L., an endangered species and fifty five water sites in Poland. The aim of the present work was to test the Self-Organizing Feature Map in order to examine and predict water properties and type of trophicity for restoration of the rare plant. Descriptive statistical parameters have been calculated, analysis of variance and cluster analysis were carried out and SOFM model has been constructed for analysed sites. The results of SOFM model and cluster analysis were compared. The study revealed that the ordination of individuals and groups of neurons in topological map of sites are similar in relation to dendrogram of cluster analysis, but not identical. The constructed SOFM model is related with significantly different contents of chemical water properties and type of trophicity. It appeared that sites with A. vesiculosa are predominantly distrophic and eutrophic waters shifted to distrophicity. The elevated model showed the sites with chemical properties favourable for restoration the species. Determined was the range of ecological tolerance of the species in relation to habitat conditions as stenotopic or relatively stenotopic in respect of the earlier accepted eutrophic status. The SOFM appeared to be a useful technique for ordination of ecological data and provides a novel framework for the discovery and forecasting of ecosystem properties constituting a validation of the SOFM method in this type of studies.

Fungi and straminipilous organisms found in ponds in Bialystok

100%

Godlewska A., Kiziewicz B., Muszynska E., Mazalska B.

Polish Journal of Environmental Studies

2009

tom 18

nr 3

369-376

Our study involved the quantitative analysis of species composition of fungi and straminipilous organisms in four ponds situated in Białystok, Poland. The observations performed in April and November 2006 with respect to hydrochemical conditions revealed the occurrence of 48 species, including 9 fungi and 39 straminipilous organisms. Among species of fungi and straminipilous organisms, we found such pathogens of crustaceans and fish as Achlya dubia, Ac. oblongata, Ac. polyandra, Aphanomyces bosminae, Ap. laevis, Dictychus monosporus, Pythium jirovecii, Py. undulatum, Saprolegnia ferax, S. parasitica, S. pseudocrustosa and Thraustotheca clavata. The human pathogens Aspergillus niger, Candida tropicalis and Catenophlyctis variabilis as well as plant pathogens Pythium butleri and Py. debaryanum were also found. Such phytosaprophytes as Achlya klebsiana, Karlingia rosea, Nowakowskiella elegans, N. macrospora, Pythium akanense, Py. aquatile, Py. elongatum, Py. inflatum and Py. intermedium were relatively common. Most species of fungi and straminipilous organisms were found to grow in Dojlidy Pond (27), the fewest in Akcent Pond (14). The hydrochemical analysis of water showed that Dojlidy was the least burdened with organic matter, whereas Akcent was the most abundant in biogenic compounds.

Ograniczanie wyników

1 Acta Societatis Botanicorum Poloniae

1 Polish Journal of Environmental Studies

1 Godlewska A.

1 Kaminski R.

1 Kiziewicz B.

1 Kosiba P.

1 Mazalska B.

1 Mroz L.

1 Muszynska E.

1 2011

1 2009

Wyniki wyszukiwania

Assessment of habitat conditions using Self-Organizing Feature Maps for reintroduction/introduction of Aldrovanda vesiculosa L. in Poland

Fungi and straminipilous organisms found in ponds in Bialystok