Vegetation analyses (phytosociological relevés) of 20 peat bogs arranged along an altitudinal gradient in the southern part of the Czech Republic, Central Europe, revealed relationships between vegetation and environmental gradients. Six of the peat bogs were investigated in detail. The bogs were dominated by Pinus rotundata, a species endemic to Central Europe, and its hybridogenous populations with P. mugo (the hybrid is called P. ×pseudopumilio), with increasing proportions of the latter at higher altitudes. Data were processed using indirect (DCA) and direct (CCA) gradient analyses. Environmental variables (depth of the water table, mean and minimum temperatures, precipitation, pH, conductivity, NH4 and PO4 concentrations, total P, but not total N nor NO3 concentration), as well as biotic characteristics of the sites, such as species composition, and growth form of the dominant pines, were closely correlated with altitude. Woody species, herbs and bryophytes responded to the altitude similarly. Results also indicated the unique characteristics of each bog.
Cephalozia macrostachya Kaal. has been recently found in the ‘Swamp’ mire near Doksy (Northern Bohemia). The following revision of herbarium specimens of Cephalozia loitlesbergeri Schiffn. revealed one more specimen of C. macrostachya, collected already in 1965 in the Krušné hory Mts. The habitat preferences for both species in Central Europe are discussed and it is assumed that while C. loitlesbergeri is a clearly upland species of open, acidic raised bogs, C. macrostachya seems to prefer lowland poor fens or lagg parts of bogs in middle altitudes.
The second version of the checklist and Red List of bryophytes of the Czech Republic is provided. Generally accepted infraspecific taxa have been incorporated into the checklist for the first time. With respect to the Red List, IUCN criteria version 3.1 has been adopted for evaluation of taxa, and the criteria used for listing in the respective categories are listed under each red-listed taxon. Taxa without recent localities and those where extinction has not been proven are listed as a subset of DD taxa. Little known and rare non-threatened taxa with incomplete knowledge of distribution which are worthy of further investigation are listed on the so-called attention list. In total, 849 species plus 5 subspecies and 19 varieties have been accepted. 23 other historically reported species and one variety were evaluated as doubtful with respect to unproven but possible occurrence in the territory, and 6 other species with proven occurrence require taxonomic clarification. 43 taxa have been excluded from our flora compared to the last checklist version. 48.6 % of evaluated taxa have been listed in either of the Red List categories (EX (RE), CR, EN, VU, LR or DD), which is comparable to other industrialized regions of Central Europe.
Hypnum sauteri and Lescuraea patens are reported new and Hypnum recurvatum confirmed for the bryoflora of the Czech Republic. The two Hypnum species have been discovered in the valley of Rudný potok brook, Lescuraea patens has so far been recorded at several microsites in the glacial cirques of Mt Kotel, Labský důl valley and Úpská jáma cirque (all localities in the Krkonoše Mts). Full details of the localities are described, the plants are illustrated, and their ecology, distribution and diagnostic characters are briefly discussed.
A notion of an almost regular inductive limits is introduced. Every sequentially complete inductive limit of arbitrary locally convex spaces is almost regular.
Boj proti nádorům, archeologické nálezy, kulturní dědictví, astrofyzika, pivo, vltavíny či ekologie - zdálo by se, že takto vzdálené oblasti a pojmy mohou mit sotva co shodného. Přesto: jejich společným jemnovatelem jsou jaderné reakce, které k jejich výzkumu vypracovali a využili v Ústavu jaderné fyziky v Řeži. and Jana Olivová, Jan Kučer, Tomaš Hellebrand.