Applications of self‐organizing map for patterning macrofungal diversity of xerothermic swards

Adamczyk, Justyna

doi:10.1007/s11284-011-0812-9

Cited by 9 publications

(4 citation statements)

References 31 publications

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“…Two species of the genus Disciseda: Disciseda bovista and D. candida, associated with Pontic-steppe vegetation, are appropriate species of the associations Festucetum pallentis and Sisymbrio-Stipetum capillatae [6,19,[31][32][33][34]. Localities noted in our study confirm their affiliation with grasslands of the alliances Festuco-Stipion and SeslerioFestucion duriusculae.…”

Section: Xerothermic Communities and Fruitbody Productivity: An Analysissupporting

confidence: 54%

Selected rare and protected macrofungi (Agaricomycetes) as bioindicators of communities of xerothermic vegetation in the Nida Basin

et al. 2015

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Results of mycological investigations conducted in xerothermic grasslands of the Nida Basin in the years 1984-2013 are presented. Our research brings up to date the current knowledge on ecological requirements of threatened species of macrofungi. Strong affiliations between macrofungi and specific phytocenoses of the alliances Festuco-Stipion and Seslerio-Festucion duriusculae were detected. A considerable influence of the occurrence of certain species of steppe fungi on the composition of the mycobiota in the Nida Basin was identified.

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Section: Xerothermic Communities and Fruitbody Productivity: An Analysissupporting

confidence: 54%

Selected rare and protected macrofungi (Agaricomycetes) as bioindicators of communities of xerothermic vegetation in the Nida Basin

et al. 2015

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“…Such a profound difference between X 2 (in which samples from the 1990s are dominant) and Y 1 , Y 2 (containing almost all the samples from the 2000s) testifies to a much better quality of the aquatic environment at sites from which samples assigned to the two latter subclusters come from. The results also testify the potential bioindicative role of the number of species exhibiting the significantly highest IndVals for a given group of samples (Adamczyk, ; Szczepko et al ., ).…”

Section: Discussionmentioning

confidence: 68%

Natural Regeneration of Fish Assemblages in the Pilica River After a Reduction of Point‐source Pollution

Kruk

Penczak

2012

River Research & Apps

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Electrofishing was conducted along the Pilica River, the biggest West tributary of the Vistula, Poland. This paper presents a comparison between the 1990s (1994-1995, 63 sites) and 2000s (2003-2005, 64 sites), that is, because the water quality started improving after 1989. In the Pilica, there is an increased risk of masking relationships between fish distribution and abiotic factors because a dam without a fish pass was constructed in the middle course of the river in 1973, perhaps resulting in fewer possibilities for potential colonizers reaching river fragments fit for colonization. The main aim of this study was to check if natural fish fauna regeneration took place in the river following a significant sewage input reduction. The fish samples were classified with a Kohonen artificial neural network and assigned to two main clusters (X and Y) and, respectively, two pairs of subclusters (X 1 , X 2 ; Y 1 , Y 2 ) of neurons. No species attained its significantly highest biomass and/or frequency (expressed as IndVal) in X 2 (in which samples from the 1990s dominated), whereas 21 species did so in Y 1 or Y 2 (containing almost all of the samples from the 2000s), better testifying to the aquatic environment at the sites where the samples assigned to two latter subclusters come from. Moreover, significantly higher values for Y 1 and/or Y 2 when compared with X 2 were recorded in the richness of the fish species, the total fish biomass and total rheophilic fish biomass. In summary, the positive reaction of ichthyofauna to the improvement of the water quality, stated after 1989, was not recorded during the sampling in 1994-1995, but with a considerable delay in [2003][2004][2005]. It should be emphasized that the improvement in fish assemblages was recorded in the Pilica both upstream and downstream from the dam reservoir. A good ecological status was recorded even for some samples from the 1990s. They were collected in the lower river course, where the fish could move freely from the Vistula. This testifies the combined role of the presence of potential colonizers and the functioning ecological corridors for fish assemblages in a river system under human impact.

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“…The SOM method has previously been used in vegetation studies (e.g. Luyssaert et al 2004;Zhang & Yang 2008;Adamczyk 2011;Suriguga et al 2011;Adamczyk et al 2012), but it was applied to contemporary investigations. It has never before been used to analyse historical data obtained by the classical Braun-Blanquet method.…”

Section: Discussionmentioning

confidence: 99%

Application of a Kohonen's self‐organizing map for evaluation of long‐term changes in forest vegetation

Adamczyk

Kurzac

Park

et al. 2012

J Vegetation Science

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Question Can a Kohonen's self‐organizing map, which is robust to non‐linear relationships between variables and their non‐normal distributions, be effective in patterning the data on plant communities investigated with the classical Braun‐Blanquet phytosociological method based on the ordinal scale? Does the application of the self‐organizing map make it possible to obtain new information from the analysed plant communities when compared to the Braun–Blanquet method alone? Location The Babsk nature reserve, Central Poland. Methods The analysed data were derived from two separate series of phytosociological studies on plant communities dating from periods 31 yr apart (1960 and 1991). The data consisted of 24 quantitative sampling lists of plant species (=phytosociological releves). The releves were analysed by the application of a Kohonen's self‐organizing map and the indicator value (IndVal). Results The transformations from Querco roboris–Pinetum to Tilio cordatae–Carpinetum betuli in the vegetation in the Babsk nature reserve over 31 yr were determined precisely. Valuable new data were also obtained on: (1) significant associations of individual plant species with the previous and recent phytocoenoses, i.e. diagnostic groups of plant species for each phytocoenosis; (2) abiotic conditions (determined retrospectively in the two study periods on the basis of ecological indicators for vascular plants); and (3) the concordance of phytocoenoses with the biotope. Conclusions The Kohonen's self‐organizing map method and the IndVal made it possible to efficiently identify abiotic and biotic patterns for plant communities on the basis of the data expressed in the conventional Braun‐Blanquet scale.

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Applications of self‐organizing map for patterning macrofungal diversity of xerothermic swards

Cited by 9 publications

References 31 publications

Selected rare and protected macrofungi (Agaricomycetes) as bioindicators of communities of xerothermic vegetation in the Nida Basin

Selected rare and protected macrofungi (Agaricomycetes) as bioindicators of communities of xerothermic vegetation in the Nida Basin

Natural Regeneration of Fish Assemblages in the Pilica River After a Reduction of Point‐source Pollution

Application of a Kohonen's self‐organizing map for evaluation of long‐term changes in forest vegetation

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