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Featured researches published by Vanda Rádková.


Biologia | 2016

Diversity patterns of aquatic specialists and generalists:contrasts among two spring-fen mesohabitats and nearby streams

Lenka Hubáčková; Vanda Rádková; Jindřiška Bojková; Vít Syrovátka; Vendula Polášková; Jana Schenková; Michal Horsák

Abstract Habitat specialists and generalists are known to differ in their width of environmental tolerance and their representation can vary along with the ecological contrast of habitats. In this study we explore factors shaping patterns of species richness and abundance of aquatic macroinvertebrate habitat specialists and generalists at isolated spring fens, separately for spring patch and spring brook mesohabitats at each site. We also examined habitat contrast of these unique island-like communities by the comparison of spring fen specialists and habitat generalists shared between the two spring fen mesohabitats and the nearest stream to each of 13 selects fen sites. Aquatic macroinvertebrates (Clitellata, Ephemeroptera, Plecoptera, Trichoptera, and Diptera) were investigated at 62 isolated spring fens, with 357 taxa identified in more than 172,000 individuals collected. We found that specialists experienced a stronger relation to local environmental conditions (i.e. the amount of dissolved oxygen and water conductivity) at both spring mesohabitats than generalists, primarily responding to fen habitat size. In contrast, responses of species abundances at spring patches and spring brooks differed as the abundances were controlled by the amount of oxygen in spring patches and by habitat size in spring brooks. Based on Trichoptera and Diptera assemblages we found a similar contrast between both spring fen sites and nearby streams. Our results suggest a higher resilience of specialist populations in well oxygenated sites and their competitive advantage over generalists at these sites, which stresses the importance to prevent any significant decrease of oxygenation (e.g., by eutrophication or drainage), especially in spring patches.


Insect Conservation and Diversity | 2014

Trends in species diversity of lotic stoneflies (Plecoptera) in the Czech Republic over five decades

Jindřiška Bojková; Vanda Rádková; Tomáš Soldán; Světlana Zahrádková

An unusual data set of Plecoptera, very sensitive aquatic insects, allow diversity changes to be estimated for 175 streams in the Czech Republic between two periods, 1955–1960 and 2006–2011. Substantial overall declines in Plecoptera biodiversity were found. Three‐quarters of the species studied declined in their frequency of occurrence, 48% of which were estimated have undergone a reduction of >30%. Overall, streams either at lowland or submontane altitude, particularly large rivers, lost the most species. A significant decrease in local species biodiversity was found in streams up to 700 m a.s.l., especially in small rivers. The taxonomic dissimilarity between contemporary and previous assemblages increased from montane to lowland altitudes (from ˜30 to ˜70%) and was the same in streams of different size (˜50%). Partitioning of dissimilarity showed that the overall change in dissimilarity was primarily driven by changes in species richness; however, species replacement was not negligible. The results demonstrated that aquatic insect biodiversity (Plecoptera in particular) is substantially declining in Europe, probably to a similar or greater extent than terrestrial insects, with potential implications for biodiversity of running waters. Plecoptera showed a complex response to habitat change, including loss of pollution‐sensitive species and habitat‐specialists as well as common species, which, in some cases, counterbalanced their losses by concurrent colonisation of new sites.


Freshwater Biology | 2014

The role of dispersal mode and habitat specialisation in metacommunity structuring of aquatic macroinvertebrates in isolated spring fens

Vanda Rádková; Jindřiška Bojková; Vendula Křoupalová; Jana Schenková; Vít Syrovátka; Michal Horsák


Limnologica | 2014

The importance of species replacement and richness differences in small-scale diversity patterns of aquatic macroinvertebrates in spring fens

Vanda Rádková; Vít Syrovátka; Jindřiška Bojková; Jana Schenková; Vendula Křoupalová; Michal Horsák


Journal of Biogeography | 2015

Drivers of aquatic macroinvertebrate richness in spring fens in relation to habitat specialization and dispersal mode

Michal Horsák; Vanda Rádková; Vít Syrovátka; Jindřiška Bojková; Vendula Křoupalová; Jana Schenková; Jana Zajacová


Freshwater Biology | 2016

Constraints on the biological recovery of the Bohemian Forest lakes from acid stress

Jaroslav Vrba; Jindřiška Bojková; Pavel Chvojka; Jan Fott; Jiří Kopáček; Miroslav Macek; Linda Nedbalová; Miroslav Papáček; Vanda Rádková; Veronika Sacherová; Tomáš Soldán; Michal Šorf


Aquatic Conservation-marine and Freshwater Ecosystems | 2015

Mayflies (Ephemeroptera) as indicators of environmental changes in the past five decades: a case study from the Morava and Odra River Basins (Czech Republic)

Blanka Zedková; Vanda Rádková; Jindřiška Bojková; Tomáš Soldán; Světlana Zahrádková


Ecological Engineering | 2017

Post-mining calcareous seepages as surrogate habitats for aquatic macroinvertebrate biota of vanishing calcareous spring fens

Vendula Polášková; Jana Schenková; Martina Bartošová; Vanda Rádková; Michal Horsák


Archive | 2016

Aquatic invertebrates of calcareous wetlands in post - mining landscape: a comparison with natural calcareous fens

Vendula Polášková; Jana Schenková; Martina Bartošová; Vanda Rádková


Archive | 2016

The diversity of aquatic invertebrates in helocrenes: regionaland local perspective of the Western Carpathian springs

Vít Syrovátka; Jindřiška Bojková; Vendula Polášková; Vanda Rádková; Jana Schenková; Michal Horsák

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Tomáš Soldán

Sewanee: The University of the South

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