Vanda Rádková
Masaryk University
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Featured researches published by Vanda Rádková.
Biologia | 2016
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
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
Vanda Rádková; Jindřiška Bojková; Vendula Křoupalová; Jana Schenková; Vít Syrovátka; Michal Horsák
Limnologica | 2014
Vanda Rádková; Vít Syrovátka; Jindřiška Bojková; Jana Schenková; Vendula Křoupalová; Michal Horsák
Journal of Biogeography | 2015
Michal Horsák; Vanda Rádková; Vít Syrovátka; Jindřiška Bojková; Vendula Křoupalová; Jana Schenková; Jana Zajacová
Freshwater Biology | 2016
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
Blanka Zedková; Vanda Rádková; Jindřiška Bojková; Tomáš Soldán; Světlana Zahrádková
Ecological Engineering | 2017
Vendula Polášková; Jana Schenková; Martina Bartošová; Vanda Rádková; Michal Horsák
Archive | 2016
Vendula Polášková; Jana Schenková; Martina Bartošová; Vanda Rádková
Archive | 2016
Vít Syrovátka; Jindřiška Bojková; Vendula Polášková; Vanda Rádková; Jana Schenková; Michal Horsák