Tomáš Čejka

Tomáš Čejka
Slovak Academy of Sciences | SAV · Institute of Botany, Plant Science and Biodiversity Center

21.39
 · 
Ph.D.
About
71
Research items
10,042
Reads
453
Citations
Introduction
Education: PhD in Zoology, Faculty of Natural Sciences, Comenius University, Bratislava, Slovakia Professional Experience: • Land and freshwater molluscan ecology [mainly large river floodplains, urban and agriculturally fragmented habitats] • Paleoecology end environmental history [paleolimnology of large rivers, environmental archaeology] • More than 20 yrs experience in monitoring of terrestrial molluscan fauna changes evoked by Gabcikovo Waterworks operation on the Middle Danube, Slovakia.
Research Experience
Dec 2015
Institute of Botany, Plant Science and Biodiversity Center, Slovak Academy of Sciences
Position
  • Researcher
Dec 2015
Slovak Academy of Sciences, Institute of Botany
Position
  • What is the biological value of drainage ditches? (Project leader)
Mar 2008 - Sep 2010
Zoological Society of London
Position
  • Multidisciplinary assessment of the functions and importance of artificial water reservoirs and their environmental management.
Description
  • Small water reservoirs, impoundments, human impact, benthos, neural networks, ecology, environmental management
Education
May 1999 - Jun 2003
Slovak Academy of Sciences
Field of study
  • Zoology
Sep 1984 - Jun 1988
Mendel University in Brno
Field of study
  • Zoology
Network
Cited By
Followers
Following
Projects
Projects (3)
Project
AquaBOL.SK is an initiative focused on DNA barcoding / metabarcoding of aquatic biota with the long-term goal of building a DNA barcodes reference library of complete aquatic biota of Slovakia for use in scientific purposes and in monitoring of aquatic ecosystems.
Project
[1] To verify the extent to which the principles of island biogeography (or ecology) fit the theory in the model territory of the city and what is the impact of fragmentation and environmental variables on the ecological structure and diversity of biota (island area, age, vegetation structure, isolation degree, site degradation, etc.). [2] Find out how the urban environment influences diversity of the autochthonous biota over time (compared to historical data) and space (ecological gradients). [3] Based on the refugia theory to find out what is the difference between the biota of these types of refugia and to verify whether the ecologically and ecosozologically notable species survive in the forest remnants, and how numerous are their populations (the presence of non-indigenous, expansive or invasive species, the degree of isolation of the site, the current and planned anthropic activity in the vicinity). [4] Find out if and to what extent the genetic diversity and structure of the populations of selected model species differs in the long-term, affluent, relatively natural parts and the isolated remains ("islands") of vegetation.
Research
Research items (71)
Article
Full-text available
The paper presents results of analyses of various types of organic remains recovered from a waterlogged fill of the sunken structure from Hurbanovo (SW Slovakia) dated to the Early Roman period (1st and 2nd century AD). The structure represents a unique find – the only archaeological feature with waterlogged infill at the site and one of nine known...
Article
Full-text available
Drainage canals or ditches are man-made watercourses. Their zooplankton fauna is often neglected as these environments are not an optimal habitat for this community. Within a comparative environmental study, we explored zooplankton assemblages in 12 agricultural drainage ditches, in the Žitný Ostrov. A total of 58 species of zooplankton crustaceans...
Poster
Full-text available
The research of the Czech and Slovak mollusc fauna has a long tradition spanning the last 150 years. Particularly, in the last two decades, existing records were put in databases and distributional maps for most species are available on-line. The journal Malacologica Bohemoslovaca, which focuses on publishing faunistic studies from Europe, has been...
Article
Full-text available
This study deals with the molluscan fauna of the Hostýnské vrchy Hills (Central Moravia, Czech Republic). The main goal was to make a systematic inventory of the molluscan fauna in this area. Snails were collected in September 2010 by hand picking and litter sampling at selected sites. Final database was pooled with earlier published and unpublishe...
Article
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New records of an introduced peacock fly Callopistromyia annulipes (Macquart, 1855) from 19 localities in Slovakia are presented.
Article
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Revisory research of floral and animal assemblages from the Neanderthal site of Gánovce-Hrádok confirmed the previous stratigraphic division of the travertine mound to five horizons on the basis of different petrological and palaeontological contents, indicating climatic and palaeoenvironmental changes in the vicinity, from the Saalian termination...
Article
Full-text available
Revisory research of floral and animal assemblages from the Neanderthal site of Gánovce-Hrádok confirmed the previous stratigraphic division of the travertine mound to five horizons on the basis of different petrological and palaeontological contents, indicating climatic and palaeoenvironmental changes in the vicinity, from the Saalian termination...
Article
The importance of macroclimate and dispersal limitation in the broad-scale variation of European urban land snail assemblages is likely to differ between native and non-native species because of the southern origin of many non-native snails, often spread by humans. We sampled land snails in each of 32 European cities and compiled from the literatur...
Article
Full-text available
In 2004 – 2015, we conducted a malacological survey at 12 sites of wind-blown sand in the Danubian lowland. During the fieldwork, we used conventional methods of sampling; mostly individual searching and litter sieving. At each site, one person have collected snails for one hour. A total of 22 species were found in the whole surveyed territory. The...
Data
Full-text available
The current version of the check-list follows Horsák et al. (2013) with up-to-date modifications supplemented with a reference. Distribution map for each species was constructed based on published data and our knowledge based on unpublished records. So far 251 species of molluscs, including 223 species of gastropods (51 aquatic and 172 terrestrial)...
Article
Full-text available
Tandonia kusceri (Wagner, 1931) is reported from Slovakia for the first time. The slug was found in the Ružinov and Petržalka housing estates, Bratislava, in 2014 and 2015, respectively. Our observations suggest that the species is well established in the Slovak capital. This finding calls for verification of some of the older reports of a similar...
Article
Full-text available
In stream corridors, driftwood represents mainly a dead vegetation biomass and diverse artificial material relocated along a stream by flooding. Most driftwood can contain empty molluscan shells or a minor proportion of live individuals (i.e. molluscan allocoenoses). Drifted material is important for spreading of fauna and flora. Molluscan allocoen...
Article
Full-text available
In the autumn of 2014, we conducted a malacological survey at 23 freshwater bodies in the Danubian lowland, SW Slovakia. We aimed to conduct a malacological inventory of semi-natural sites of a high conservation value. During the fieldwork, we used conventional methods of sampling; mostly sweeping by a hemispherical metal kitchen strainer from both...
Article
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Šírenie a existencia druhov mimo ich domoviny sa stáva celosvetovým problémom a týka sa takmer všetkých skupín organizmov. Rovnaké javy sa preto často nazývajú rôznymi menami, zatiaľ čo jeden a ten istý výraz sa môže aplikovať na rôzne javy. Pre medzinárodnú aj medziodborovú komunikáciu je nutné zjednotenie tejto terminológie. Doteraz najvýraznejší...
Article
Full-text available
Forested scree slopes represent one of the types of shallow subterranean habitats characterised by several unique traits, such as close contact with the soil surface, better availability of organic matter, and lower seasonal fluctuations in microclimate. Relatively varied assemblages of gastropods were collected using a series of subterranean traps...
Article
Full-text available
Until 2013, no published records of the Desmoulin's whorl snail (Vertigo moulinsiana) were known from the Danube lowland in the Slovak Republic. In this paper we present the first record of the Desmoulin's whorl snail in this area, and report the site conditions and the structure of accompanying land snail community. The site was examined by visual...
Article
Full-text available
The effects of non-native species invasions on community diversity and biotic homogenization have been described for various taxa in urban environments, but not for land snails. Here we relate the diversity of native and non-native land-snail urban faunas to urban habitat types and macroclimate, and analyse homogenization effects of non-native spec...
Data
List of native and alien species recorded in 32 Central European cities; numbers of plots and cities with the species presence are given. (PDF)
Article
Full-text available
The paper brings a review of a long-term malacological survey of fragmented urban alluvial woodland, an important refuge of Middle-Danubian terrestrial molluscan fauna. In the area of Bratislava agglomeration we surveyed two softwood and 26 hardwood alluvial forests. Altogether, 52 mollusc species have been recorded during the last 20 years (repres...
Conference Paper
Full-text available
The loessic hilly lands in the Danube Basin (Slovakia) are characterised by favourable climatic conditions, smooth topography, fertile soils and a long land-use history. In a 28 ha large zero-order catchment (Voderady) differentiation of Chernozem cover was studied based on 219 soil augerings and 4 trenches. Severe erosion on the hillslopes was det...
Article
Full-text available
The research was focused on the impact of the small dams on the structure and ecological parameters of the permanent macrozoobenthos community in the inflow and outflow of these dams. The quantitative samples were taken in the inflow, outflow and littoral zone of the reservoir Doľany, Suchá nad Parnou, Dolné Dubové, Kuchyňa, Lozorno and Vývrat from...
Article
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Aim Urbanization is associated with strong changes in biodiversity, but the diversity of plant and animal assemblages varies among urban habitats. We studied effects of urban habitats on the diversity of vascular plants and land snails in 32 large cities. Location Central Europe, Belgium and the Netherlands. Methods The species composition of all v...
Article
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The survey presents the molluscan fauna from six impoundment systems of two sides (NW and SE) of the Small Carpathians. Altogether 25 species (15 gastropod and 10 bivalve) species were identified in reservoirs and their subsystems (inflows and outlets). The number of species per site ranged from 2 to 12, the mean number of species per site was 7. T...
Article
Aim It is generally believed that communities of small organisms, or those with small propagules, are structured mainly by local niche-based processes, and less by dispersal limitation. Conversely, weaker environmental and stronger spatial structure, indicating dispersal limitation, are expected to occur more frequently in communities of large orga...
Article
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City parks represent fragments of natural habitats often with altered pro­perties. We were curious how many molluscan species a historic castle garden may host, what is the composition of such community and whether there are endangered or rare species present in such habitat. We sampled eight different habitat types in the Frederiksborg Castle Gard...
Article
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Zitny ostrov, the largest island of the Danube River (SW Slovakia) gained its present shape in the Neoholocene period. As a result of increased flood and geomorphological Danube river activity dated to 1378–1528 AD, the Lower Dudvah River was abandoned and its alluvium became a part of the Zitny ostrov. Study of a Dudvah terrestrialized paleomeande...
Article
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Pupilla pratensis (Clessin, 1871) was recently confirmed as a distinct species based on morphological, ecological and molecular evidence. The main purpose of this study is to publish the first reliable data on the occurrence of P. pratensis in the Czech Republic and Slovakia. The second goal is to analyse conchometry of P. pratensis, P. muscorum (L...
Article
Full-text available
In this paper we provide a new list of all the mollusc species recorded outdoors in the Czech and Slovak Republics. This work is a supplement of the Ložek’s key on molluscs of the former Czechoslovakia. For the species recorded after the publishing of the book, publications of their first records in the Czech and Slovak Republics are given. Species...
Question
Hi there. Are there any published facts on distribution and recent spreading of Dreissena bugensis? Does anybody know some fact about its presence in the Danube river? Thanks, in advance for reply. Tom
Answer
There are about 5,000 species of slugs in the world. (Source: http://wiki.answers.com)
Article
Full-text available
Moisture along with available calcium content are the major environmental factors controlling species richness and composition of the terrestrial molluscan fauna. In the present study, we focused on snails in a floodplain forest and their response on humidity. We described the model of response and calculate the humidity optima of particular specie...
Poster
Full-text available
Diversity of Central European urban land snails
Conference Paper
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č Impact of the wind disaster in High Tatras on 19 November 2004 on molluscs and Carabids was studied in six plots ranging from an intact mature spruce forest, through damaged forests with timber letin situ, four plots with extracted timber, among which two plots were additionally affected by fire. The molluscs reacted on the increasing damaging of...
Article
Full-text available
The purpose of this paper is to summarise up-to-date information on the ecology and distribution of Vertigo angustior, V. geyeri, and V. moulinsiana in Slovakia. V. moulinsiana is an inhabitant of both treeless calcareous-fens and calcium-rich sedge marshes situated in warm lowland regions. V. angustior occurs in various types of habitats (i.e. dif...
Article
Full-text available
Previously only one species of the genus Lucilla was reported from the Czech and Slovak Republics. Since this taxon is currently considered as two distinct species (L. singleyana and L. scintilla), a revision of older Czech and Slovak records was needed. The revision of available voucher material yielded findings of both species in Slovakia, contra...
Article
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The checklist of 245 mollusc species known so far from the Slovak Republic is presented, plus 11 species limited to greenhouses or thermal waters. Critical comments on species erroneously mentioned in recent publications from Slovakia are included.
Article
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Small water reservoirs are the very important landscape elements for effective water management. Although these man-made artificial biotopes change the proportion of lotic and lentic habitats and thus influence the species community structure, them secondarily offer a broader scale of microhabitats and, in general, can significantly influence the f...
Article
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The scientific activity of the outstanding Slovak ecologist and malacologist Mikuláš Lisický is characterized
Article
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In the summer of 2007, during a survey on the urban snail fauna of Bratislava, we found one fresh, adult shell of Cecilioides petitiana, which was recorded in Slovakia at just one site more that 60 years ago.
Article
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The species richness and composition of land snail assemblages in 42 floodplain forest sites along the Danube River in Slovakia were studied to find the main ecological gradients responsible for the variation in the faunas. We found just one, but steep, ecological gradient influencing the variation of snail species composition among different flood...
Article
Full-text available
All published and known unpublished data on Potamopyrgus antipodarum (Gray, 1843) from the Slovak Republic are summarised. The Slovak distribution is restricted to the southern parts of the country close to the Danube, Morava, and Hron Rivers. Geographic and vertical distribution is described. The most of the localities are placed between 100 and 1...
Article
Full-text available
The checklist of 245 mollusc species known so far from the Slovak Republic is presented, plus II species limited to greenhouses or thermal waters. Critical comments on species erroneously mentioned in re-cent publications from Slovakia are included.
Conference Paper
Full-text available
This paper examines alluvial forested swamps of 6 paleomeanders of the former Dudváh river (at Žitný ostrov island, SW Slovakia). Cluster analyses, Twinspan and gradient analysis (DCA) have been adopted to analyse material of 16 phytosociological relevées and a total of 98 plant species obtained in the course of 2005–2007 seasons. Based on these an...
Article
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The present paper summarizes all data on molluscan fauna from the Šúr National Nature Reserve between 1918–2005. It represents the largest Central-European remaining area of the autochthonous virgin alder swamp wood lying in a low basin (Carici elongatae-Alnetum Swickerath, 1933). Adjacent protected biotopes (flooded meadows, thermophilous Pannonia...
Article
Full-text available
91 mollusc species were recorded from 92 sites in the Bukovské vrchy Mts (Slovakia) as a result of the recent malacological research, combined with earlier published and unpublished data. The most important communities of predominantly East Carpathian species occur throughout the deciduous woodlands dominated by beech. The mollusc communities are c...
Article
Full-text available
During the research in floodplain of river Morava several groups of invertebrate fauna (Mollusca, Acari, Areneae, Collembola and Coleoptera) were studied. These animal groups were studied in various habitats with different soil moisture during the years 2000-2002. Standard methods of field research were used there. During the research the basic soi...
Article
Full-text available
During the research in floodplain of river Morava several groups of invertebrate fauna (Mollusca, Acari, Areneae, Collembola and Coleoptera) were studied. These animal groups were studied in various habitats with different soil moisture during the years 2000-2002. Standard methods of field research were used there. During the research the basic soi...
Article
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Shells and one living adult of the freshwater bivalve Corbicula fluminea were found on the three localities of Danube river and its surroundings, SW and S Slovakia.
Article
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An adult individual of the slug Deroceras panormitanum (Lessona et Pollonera, 1882) was found in a greenhouse in the town of Bratislava (SW Slovakia, C Europe).
Article
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As a part of wider research – study of the Danube River palaeochannels at Žitný ostrov Island, we surveyed the freshwater molluscan fauna of aquatic and semi-natural wetland habitats: 13 artificial waterbodies (7 ditches, 5 pits after extraction of fen peat), channel of paleopotamon type and wetland habitat of reed-covered marshy depression. We use...
Article
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All published and known unpublished data on Tandonia budapestensis (Hazay, 1881) from the territory of the Czech and Slovak Republics are summarised. This species occurs rarely in both states in altitudes up to ca. 420 m. and is closely bound to anthropogenous habitats.
Article
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We studied subfossil Molluscan assemblages in the Danube river alluvium near Bratislava, Slovakia. The model floodplain site, currently overgrown by alluvial woodland, was produced by lateral and vertical accretion of fluvial deposits between 1780s-1972. In total 1335 specimens representing 2 aquatic and 31 terrestrial taxa were recovered from soil...
Article
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Living adults of the freshwater snail Theodoxus fluviatilis (Linné, 1758) and fresh shells of the bivalve Sphaerium solidum (Normand, 1844) were found on the left bank of the Danube river, SW Slovakia. T. fluviatilis is in the catchment area of Danube river native only in lowermost part and new finds in Hungary, Austria and now also Slovakia, are r...
Article
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Data on first occurence and initial distribution of Corbicula fluminea in the Slovakian part of the river Danube are given.
Article
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In presented paper the plant macroremains and fossil molluscan assemblages which could characterise the appearance of the landscape along the Slovak part of the Danube river in the period of the short-time stay of the Roman army (2nd Century A.D.) were studied.
Article
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After the high discharges of the Danube river in February 1999 the drift rich in mollusc shells on the left bank of the river was found. Over 2700 specimens of living molluscs and empty shells were gathered, 70 species (43 terrestrial, 27 aquatic) were separated from the drift. The dominant (38.8 %) terrestrial ecological group were hygrophilous sp...
Article
Full-text available
After the high discharges of the Danube river in February 1999 the drift rich in mollusc shells on the left bank of the river was found. Over 2700 specimens of living molluscs and empty shells were gathered, 70 species (43 terrestrial, 27 aquatic) were separated from the drift. The dominant (38.8 %) terrestrial ecological group were hygrophilous sp...
Article
Full-text available
The species composition and abundance of land gastropods were investigated at 24 sites in the area of the Danubian floodplain and the adjacent part of the Zitny ostrov region during 1990-1997. 50 species of 21 families were recorded in the area. The most abundant were (in decreasing relative abundance): Aegopiaella nitens, Monachoides incarnatus, P...
Chapter
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The article brings a general synthesis of six years of monitoring of fauna (Carabidae, Mollusks, Amphibia, Arthropods, birds, lepidoptera) in the remnants of the Danube Inland delta after starting operation of the Gabčíkovo hydroelectric and navigation system. There sumarized negative impacts and recomentadion for their reduction.
Article
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In October 1992 a major part of the flow of the Danube was diverted into the diversion canal of the Gabčíkovo power plant. In the area of diversion the river was barraged since the hydrological regime of the ground water and surface water has been slowly changing, which is a limiting factor for the existence of the primary association of the flood...
Article
This study was designed to evaluate the supposed changes in the terrestric ecosystem in the area between the channelized Danube river and its bypassed section. The shift occurred at the end of October 1992. The comparison of the background period (1990-1992), with the alterations which followed mainly in the hydrological regime, displays different...