Národní úložiště šedé literatury Nalezeno 4 záznamů.  Hledání trvalo 0.01 vteřin. 
Ecology of Veliidae and Mesoveliidae (Heteroptera: Gerromorpha)in Central Europe
DITRICH, Tomáš
Ecology of Veliidae and Mesoveliidae (Hemiptera: Heteroptera: Gerromorpha) was studied in selected European species. The research of these non-gerrid semiaquatic bugs was especially focused on voltinism, overwintering with physiological consequences and wing polymorphism with dispersal pattern. Hypotheses based on data from field surveys were tested by laboratory, mesocosm and field experiments. New data on life history traits and their ecophysiological consequences are discussed in seven original research papers (four published journal papers, two submitted papers and one communication in conference proceedings), creating core of this thesis.
Note to the effects of environmental conditions on the occurrence of benthic water bug Aphelocheirus aestivalis (Heteroptera: Aphelocheiridae
Papáček, M. ; Ditrich, T. ; Soldán, Tomáš ; Zahrádková, S.
The aim of this study was to find out what abiotic environmental variables are related to the occurrence of benthic water bug Aphelocheirus aestivalis. Samples and abiotic environmental data sets obtained by extensive monitoring of Labe, Vltava and Danube river basin in the Czech Republic were sorted and analysed by Redundancy analysis (RDA). Results of RDA did not offer transparent response on our question. The reason is probably too rough scaling of environmental variables used commonly by hydrobiologist for monitoring of benthos in running waters. More detailed design of fieldwork is probably necessary for a better solution of question mentioned above.

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3 DITRICH, Tomáš
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