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Genome size variation and species relationships in Hieracium sub-genus Pilosella (Asteraceae) as inferred by flow cytometry.
Significant differences in genome size between hawkweed species from hybridogenous lineages involving the small-genome H. pilosella document the usefulness of nuclear DNA content as a supportive marker for reliable delineation of several of the most problematic taxa in Hieracium sub-genus Pilosella.
Ploidy level versus DNA ploidy level: an appeal for consistent terminology
This work appeals for consistency, distinguishing between the terms "ploidsy / aneuploidy" referring to chromosome numbers and "DNA ploidy / DNA aneu Ploidsy" to nuclear DNA content.
Vegetation changes following sheep grazing in abandoned mountain meadows
. Sheep grazing was investigated as an alternative to traditional management of meadows in the Krkonose Mts. Until the second World War these meadows were mown in mid-summer and grazed by cattle for
Anthoxanthum odoratum andA. alpinum: Life history parameters at two different altitudes
It is suggested that environmental conditions are not suitable for the flowering of A. alpinum in the “alien” locality, and that A. odoratum could have been limited in extending its distribution into the area of a similar distribution by the presence of strong competitors.
Small‐scale spatial dynamics of plant species in a grassland community over six years
. In a species-rich mountain grassland in the Krkonosse Mts., Czechoslovakia, data from four permanent plots of 50 cm x 50 cm were recorded annually from 1985 to 1990 to study the spatial dynamics of
Size and spatial pattern of Festuca rubra genets in a mountain grassland: its relevance to genet establishment and dynamics
A stable population was achieved with the values of genet spreading rate and mortality rate of shoots per cell observed in the field, and repeated seedling recruitment, however, genet natality rates may vary if environmental conditions fluctuate.
Cytogeography of Pilosella officinarum (Compositae): altitudinal and longitudinal differences in ploidy level distribution in the Czech Republic and Slovakia and the general pattern in Europe.
It is suggested that P. officinarum is in fact an amphidiploid species with a basic tetraploid level, which probably originated from hybridizations of diploid taxa from the section Pilosellina.
Preliminary classification and ecology of dry grassland communities on Ölands Stora Alvar (Sweden)
Four plant community types are described for Oland's Stora Alvar, the limestone plateau of South Oland and preliminary classified syntaxonomically and the floristic variation as expressed by the cryptogamic species composition shows largely the same pattern as that shown by the phanerogams.
Variation inHieracium subgen.Pilosella (Asteraceae): What do we know about its sources?
The present paper reviews mechanisms producing complicated patterns of variation withinHieracium subgen.Pilosella. The taxonomic complexity of this subgenus is due to highly variable basic species
Small-scale variability as a mechanism for large-scale stability in mountain grasslands
. Data from a 7-yr permanent plot study of grassland dynamics were used to address the relationship between processes at two levels of resolution (3.3 cm x 3.3 cm, 50 cm x 50 cm). Grasslands mown and