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2. Central European pine bogs change along an altitudinal gradient
- Creator:
- Bastl, Marek, Burian, Marek, Kučera, Jan, Prach, Karel, Rektoris, Ladislav, and Štech, Milan
- Type:
- article and TEXT
- Subject:
- altitude, environmental gradients, growth form, mountain pine, Pinus mugo, Pinus ×pseudopumilio, Pinus rotundata, and Pinus uncinata
- Language:
- English
- Description:
- 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.
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/
3. Cephalozia macrostachya confirmed in the Czech Republic
- Creator:
- Váňa, Jiří and Kučera, Jan
- Type:
- article and TEXT
- Subject:
- Cephalozia, Czech Republic, and habitat preference
- Language:
- English
- Description:
- 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.
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/
4. Check- and Red List of bryophytes of the Czech Republic (2003)
- Creator:
- Kučera, Jan and Váňa, Jiří
- Type:
- article and TEXT
- Subject:
- checklist, Red List, threatened taxa, mosses, liverworts, hornworts, and Czech Republic
- Language:
- English
- Description:
- 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.
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/
5. Frey W., Frahm J.-P., Fischer E. & Lobin W., revised and edited by T. Blockeel. The liverworts, mosses and ferns of Europe
- Creator:
- Kučera, Jan and Ekrt, Libor
- Type:
- article and TEXT
- Language:
- English
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/
6. Hypnum sauteri and Lescuraea patens, two additions to the moss flora of the Czech Republic
- Creator:
- Kučera, Jan, Hradílek, Zbyněk, Buryová, Blanka, and Hájek, Pavel
- Type:
- article and TEXT
- Subject:
- Krkonoše Mts, the Sudetes, Hypnum, Lescuraea, bryoflora, and threatened
- Language:
- English
- Description:
- 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.
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/
7. Sequential completeness and regularityof inductive limits of webbed spaces
- Creator:
- Bosch, Carlos and Kučera, Jan
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- localy convex space, webbed space, sequential completeness, and regularity of an inductive limit
- Language:
- English
- Description:
- Any inductive limit of bornivorously webbed spaces is sequentially complete iff it is regular.
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
8. Sequential completeness of LF-spaces
- Creator:
- Kučera, Jan
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- LB- and LF-space and regularity and sequential completeness of locally convex inductive limits
- Language:
- English
- Description:
- Any LF-space is sequentially complete if it is regular.
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
9. Sequentially complete inductive limits and regularity
- Creator:
- Gomez-Wulschner, Claudia and Kučera, Jan
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- sequential completeness, regular, resp. almost regular, and inductive limit of locally convex spaces
- Language:
- English
- Description:
- A notion of an almost regular inductive limits is introduced. Every sequentially complete inductive limit of arbitrary locally convex spaces is almost regular.
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
10. Tycho Brahe nezemřel na otravu rtutí: Zkoumání Brahových ostatků jadernými analytickými metodami
- Creator:
- Kučera, Jan, Kameník, Jan, and Havránek, Vladimír
- Format:
- Type:
- article, články, model:article, and TEXT
- Subject:
- Věda. Všeobecnosti. Základy vědy a kultury. Vědecká práce, akademie věd, academies of science, 12, and 00
- Language:
- Czech
- Description:
- In 2010, the body a Danish astronomer Tycho Brahe (1546-1601) was exhumed from a tomb in the Church of Our Lady before T9n in Old Town Square in Prague to authenticate the cause of his death. Brahe's death only eleven days after the onset of a sudden illness has been a mystery for over four hundred years. Over the centuries, a variety of myths and theories about his death were propounded. The most persistent theory has been that mercury poisoning caused Brahe's death. After studying samples for two years taken during the exhumation, the team of researchers from Aarhus University in Denmark, the University of Southern Denmark and the ASCR's Nuclear Physics Institute came to the unanimous conclusion that Brahe did not die of mercury poisoning. and Jan Kučera, Jan Kameník a Vladimír Havránek.
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public