Temat: water parameter - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: The effects of physical-chemical water parameters on the Nymphaeion alliance development in northwestern Serbia
Autorzy:: Dzigurski, D.
Ljevnaic-Masic, B.
Nikolic, L.
Powiązania:: https://bibliotekanauki.pl/articles/59239.pdf
Data publikacji:: 2014
Wydawca:: Polskie Towarzystwo Botaniczne
Tematy:: physicochemical parameter
water parameter
Nymphaeion alliance
development
Nymphaeetum albae
Nymphaeetum albo-luteae stand
Nymphoidetum peltatae
Trapetum natantis association
phytocoenosis
Serbia
Opis:: Nymphaeion alliance vegetation is dominant floating-leaved vegetation in the Danube–Tisza–Danube hydrosystem in northwestern Serbia and comprises Nymphaeetum albae, Nymphaeetum albo-luteae, Nymphoidetum peltatae and Trapetum natantis associations. Comparative analysis of physical-chemical water parameters on localities where these – in most parts of Europe endangered and vulnerable stands – develop showed that most phytocenoses are associated with specific habitat conditions. Of the analyzed water properties, the factors that cause Nymphaeion alliance phytocenoses differentiation are primarily pH, alkalinity and COD-MnO4. Formation of the Nymphaeetum albae stands is significantly associated with the highest values of pH, COD-MnO4 and alkalinity, and the lowest nitrate, nitrite, dissolved and the total phosphorus content values, in comparison to the other studied associations. Nymphoidetum peltatae stands develop in waters characterized by the lowest pH and COD-MnO4, low alkalinity, and the highest nitrate and nitrite values in relation to the other analyzed phytocenoses. Trapetum natantis stands, on the other hand, prefer the warmer sections of the canal network, neutral pH, and the highest values of BOD5, dissolved and total phosphorus. Habitat conditions in which Nymphaeetum albo-luteae stands develop are of the widest range in comparison to other investigated phytocenoses.
Źródło:: Acta Societatis Botanicorum Poloniae; 2014, 83, 2
0001-6977
2083-9480
Pojawia się w:: Acta Societatis Botanicorum Poloniae
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Assessment of habitat conditions using Self-Organizing Feature Maps for reintroduction/introduction of Aldrovanda vesiculosa L. in Poland
Autorzy:: Kosiba, P.
Mroz, L.
Kaminski, R.
Powiązania:: https://bibliotekanauki.pl/articles/59210.pdf
Data publikacji:: 2011
Wydawca:: Polskie Towarzystwo Botaniczne
Tematy:: assessment
habitat condition
Self-Organising Feature Map
reintroduction
introduction
Aldrovanda vesiculosa
Polska
ecological modelling
ecological restoration
plant species
water site
rare plant
statistical parameter
cluster analysis
topological map
Opis:: 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.
Źródło:: Acta Societatis Botanicorum Poloniae; 2011, 80, 2
0001-6977
2083-9480
Pojawia się w:: Acta Societatis Botanicorum Poloniae
Dostawca treści:: Biblioteka Nauki

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