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Wyświetlanie 1-2 z 2
Tytuł:
Self-organizing feature maps and selected conventional numerical methods for assessment of environmental quality
Autorzy:
Kosiba, P
Powiązania:
https://bibliotekanauki.pl/articles/56451.pdf
Data publikacji:
2009
Wydawca:
Polskie Towarzystwo Botaniczne
Tematy:
neural network
bioindication
modelling
degradation
numerical method
environment quality
Self-Organising Feature Map
natural ecosystem
environment pollution
Opis:
The investigations concerned sites of Acer platanoides L. infected or not by Rhytisma aceriniu (Pers.) Fr. The aim of the study was to check the occurrence of R. acerinium, and whether it reflects the environmental status. Furthermore, an analysis was carried out to find out whether the applied SOFM offers additional advantages to solve problems in relation to conventional methods. Concentrations of selected elements in soils and leaves, and leaf and "tar-spot" morphometric traits were also measured. A significant differentiation was found between sites in relation to the analyzed traits. It appeared, that sites showing lower concentrations of chemical elements and proper developmental habitat conditions massive infections take place. The study showed that R. acerinium is a good biological indicator for assessment of environmental status. The applied, conventional statistical methods, SOFM and image techniques showed similar, but not identical results for assessment of environmental quality using R. acerinium. SOFM appeared to be more useful for ordination of results and ought to be taken into account as a proper tool of estimation of various plants and their biotopes.
Źródło:
Acta Societatis Botanicorum Poloniae; 2009, 78, 4; 335-343
0001-6977
2083-9480
Pojawia się w:
Acta Societatis Botanicorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Water trophicity of Utricularia microhabitats identified by means of SOFM as a tool in ecological modeling
Autorzy:
Kosiba, P
Stankiewicz, A.
Powiązania:
https://bibliotekanauki.pl/articles/58060.pdf
Data publikacji:
2007
Wydawca:
Polskie Towarzystwo Botaniczne
Tematy:
cluster analysis
artificial neural network
ecological modelling
water trophicity
environment protection
microhabitat
validation
global change
Utricularia
SOFM method
natural ecosystem
Opis:
The study objects were 48 microhabitats of five Utricularia species in Lower and Upper Silesia (POLAND). The aim of the paper was to focus on application of the Self-Organizing Feature Map in assessment of water trophicity in Utricularia microhabitats, and to describe how SOFM can be used for the study of ecological subjects. This method was compared with the hierarchical tree plot of cluster analysis to check whether this techniques give similar results. In effect, both topological map of SOFM and dendrogram of cluster analysis show differences between Utricularia species microhabitats in respect of water quality, from eutrophic for U. vulgaris to dystrophic for U. minor and U. intermedia. The used methods give similar results and constitute a validation of the SOFM method in this type of studies.
Źródło:
Acta Societatis Botanicorum Poloniae; 2007, 76, 3
0001-6977
2083-9480
Pojawia się w:
Acta Societatis Botanicorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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