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Holocene environmental history of the Czech Karst on the basis of malacostratigraphic analyses
Hlaváč, Jaroslav ; Marek, Jaroslav (advisor) ; Juřičková, Lucie (referee) ; Kovanda, Jiří (referee)
Introduction The faunal response to crimatic- and vegetal change during the HolocenelPostglacial) is known in far. r.t. a.ti'r,' although the information issufficient ťor certain amongst invertebrates f::'lť ^* ."*uT' regions. Molluscs are unusual potentrally be ","o t3"'i3;.::"'::;:.T *;:Í..Ti:,T$#T:j, ""*Ípalaeoenvironmental questions. rne mosi vatuable sequeň",?i^oliiou,rythose that are continuous' cover long periods of time and furnish fossilassemblages that faithfulty reflect tn.li"i"g ""mmunities, from whicrr trrey''r ere derived. Relatively few deposits "onřuini.'g molluscs fulfill all these :HÍ:^ but calcareous tufa áeposits ;;;^ thes. ..qui,"-.n;; ]; i".g" The czech Karst' formed by pareozoic limestone and rocated in the centrarpart of Bohemia between |.tl ana zaliě, is an area with numerousieposits of calcareous tufa. In this karst area about 70 localities are know "rhere calcareous tufa precipitates or was deposited in the past. (Kovanda]971: Ložek 1992;Kaď1ecoia a Žat, rqďsl. '"" Purpose of dissertation The purpose of submitted work is to give the characteristicpaleoenvironmental development of selected io"uiiti", in the Czech řarst'and to complete existing- knowledge utout it. environmentar developmentrn this karst area during Holocene p"eriod- --'- rnls worl( comes from data acquired from a...
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Mollusca of European cities
Wolfová, Lucie ; Juřičková, Lucie (advisor) ; Drvotová, Magda (referee)
This bachelor thesis summarises knowledge of urban mollusc fauna. It shows cities as the centres of mollusc diversity in agricultural landscape but also as areas where high level of homogenization of mollusc assemblages were evidenced, therefore replacing native species, often endemics, with non-native and invasive species. Homogenization of urban mollusc fauna is especially caused by passive dispersal of species by human as well as to urban climate that is more favourable for spreading and surviving of non-native species, usually from warmer areas, than surrounding. There is mentioned another connected topic in this thesis - types of mollusc spreading. Furthermore, there is summarized which species of mollusc are typical for urban environment, what are the factors influencing the mollusc fauna and last but not least the methodological approaches for study of urban mollusc fauna.
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Diversity of the land snail genus Helix and its relatives (Gastropoda: Pulmonata: Helicidae) from Mediterranean origins to postglacial Central Europe
Korábek, Ondřej ; Juřičková, Lucie (advisor) ; Hausdorf, Bernardt (referee) ; Cameron, Robert A.D. (referee)
5 ABSTRACT The family Helicidae comprises the largest and most widely known land snails of the Western Palaearctic. Yet the knowledge of its diversity until recently relied largely on morphology-based taxonomic work from the early 20th century. Molecular phylogenetic data were needed to resolve several taxonomic issues and to understand the biogeographic history of the group. This thesis focuses on an Eastern Mediterranean group of helicid genera, and in particular on the type genus of the family, Helix Linnaeus, 1758. From exploring the diversity and relationships of Eastern Mediterranean and Anatolian lineages, this work follows them on their way from diversification centre up to the postglacial fauna of Central Europe. The results are based on analyses of sequences of mitochondrial genes, conchological examinations, and radiocarbon dating of Holocene subfossils. First, we compared the lineage diversity of Helix with the conclusions of a recently published morphology-based taxonomic revision. We assembled a representative dataset covering almost all species of the genus as now recognized, as well as most of potentially related genus-level taxa. We refined the genus limits, revealed several species whose delimitation may require further revision, and pointed out probable differences in how species are...
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Microhabitat diversity of mollusc communities of plain forest in Křivoklátsko PLA
Applová, Eliška ; Juřičková, Lucie (advisor) ; Horáčková, Jitka (referee)
The thesis deals with the main factors influencing the presence of molluscs in the temperate forests located on a plain in the Křivoklátsko PLA. Křivoklátsko is very unique area of Central Europe because of its natural forests. In addition to that, molluscs can serve as bioindicators of a environmental quality. The research confirmed a significant dependence of the mollusc species diversity on site humidity, soil nutrients and soil reactions, using the Ellenberg indicator values. The results also proved the local dependence of mollusc abundance on moisture and the presence of large pieces of deadwood on the site, as the greatest number of individuals were found in the microhabitat "terrain depression", where the humidity of the environment is higher, and under a fallen tree (or at the bottom of a growing tree, if a dead log was not present at the location). The continuity of the plain forests of Křivoklátsko is probably the cause of a higher species diversity of molluscs, compared to similar types of forests in Central Europe.
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