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Search for "DVOŘÁK D.": 8 articles found.
KUČERA V., DVOŘÁK D., FEDOSOVA A.G., FULJER F. (2023): First record of earth tongue Hemileucoglossum pusillum (Geoglossales) in the Czech Republic. [Ascomycota, Geoglossaceae, Řeka Nature Reserve, fen meadows, distribution.] Czech Mycology 75(2): 179-190 (published: 13th December, 2023)
abstract
In 2015, during a visit to Řeka Nature Reserve, an interesting earth tongue fungus was found in a fen meadow. It was later identified as Hemileucoglossum pusillum, a recently described species. Its occurrence on the site was also confirmed in 2021, when abundant material was collected. In the Czech Republic, it is the only known locality of this rare species, previously reported from Slovakia, Norway and Spain only. Its identity was verified both morphologically and molecularly by sequencing the ITS and LSU regions of nuclear ribosomal DNA. Its macro- and microscopic characters are presented and the variability, distribution, ecology and phenology of the species are discussed. A Czech name is proposed for the species.
HOLEC J., DVOŘÁK D., ZÍBAROVÁ L., BERAN M., ZEHNÁLEK P., PEIGER M., KUNCA V. (2023): Mycena laevigata (Fungi, Agaricales) in the heart of Central Europe – a prominent species of old-growth forests. [Basidiomycota, distribution, ecology, naturalness, nature conservation, Czech Republic, Slovakia, ITS, taxonomy.] Czech Mycology 75(1): 35-52 (published: 4th May, 2023) Electronic supplement
abstract
The distribution and ecology of Mycena laevigata was evaluated in the Czech Republic and Slovakia. We collected data on records from 32 Czech and 32 Slovak localities, mostly from dead wood of spruce, but also fir and rarely pine. Mycena laevigata is a distinctly submontane to supramontane species with its distribution peak in the montane zone and rare occurrence in the subalpine zone. Preferred habitats are supramontane spruce forests, submontane/montane mixed forests (beech, spruce, fir) and submontane beech/fir forests. Several extrazonal habitats are known, namely waterlogged spruce forests, bog forests and ravine forests. Records of M. laevigata clearly dominate in old-growth forests under protection, which are rich in dead wood of spruce and/or fir, while records from managed forests are extremely rare. The species is able to fructify on wood of all decay stages, but most frequently at advanced stages, from May to November, with peaks in June and September. The prevailing occurrence in old-growth forests shows that the species requires not only presence of dead conifer wood in any cold and humid environment, but also some degree of habitat continuity, i.e. minor human impact on the forest ecosystem. The species can therefore be used as a good indicator of habitat preservation. Its taxonomic identity was verified molecularly using the ITS sequence from Czechia. Sequences of Asian samples are somewhat different from the European ones. Its distribution in Europe is summarised and its ecology in other parts of Europe discussed.
HOLEC J., BĚŤÁK J., DVOŘÁK D., KŘÍŽ M., KUCHAŘÍKOVÁ M., KRZYŚCIAK-KOSIŃSKA R., KUČERA T. (2019): Macrofungi on fallen oak trunks in the Białowieża Virgin Forest – ecological role of trunk parameters and surrounding vegetation. [lignicolous fungi, Quercus robur, Europe, fungal diversity, ecology, wood decay, trunk orientation, forest canopy gaps, heat load.] Czech Mycology 71(1): 65-89 (published: 18th June, 2019) Electronic supplement
abstract
All groups of macrofungi were recorded on 32 large fallen trunks of pedunculate oak (Quercus robur) in various decay stages in the strictly protected zone of Białowieża National Park, Poland. The total number of species was 187 with 4–38 species per trunk. The mycobiota of individual trunks was unique, consisting of a variable set of several frequent species, a high number of infrequent to rare ones, and a considerable proportion of mycorrhizal fungi and species preferring conifer wood. Relations between trunk parameters, surrounding vegetation and fungal occurrences were analysed using multivariate statistical methods. The number of fungal species per trunk was significantly correlated with trunk orientation, which reflects the heat load via forest canopy gap, trunk size parameters, percentage of bark cover and contact with the soil. The species-richest trunks were those covered by bark, of larger volume (thick, long), not exposed to heat from afternoon sun, but, simultaneously, with lower canopy cover. Orientation (azimuth) of the fallen trunks proved to be significant also for the fungal species composition of a particular trunk, which also reflected trunk size characteristics, its moss/bark cover and contact with the soil. Presence of some dominants (Ganoderma applanatum, Mycena inclinata, Kretzschmaria deusta, Xylobolus frustulatus) had a significant effect on fungal community composition. Some herbs requiring nutrient-rich soils occurred in the vicinity of trunks with a larger contact area with the soil and in later stages of decay. The process of oak trunk decay in relation to fungi and surrounding vegetation is outlined.
HOLEC J., BĚŤÁK J., POUSKA V., DVOŘÁK D., ZÍBAROVÁ L., KOUT J., ADAM D. (2018): Old-growth forest fungus Antrodiella citrinella - distribution and ecology in the Czech Republic [macrofungi, polypore, habitats, substrates, phenology, indicator fungus, forest naturalness, Europe] Czech Mycology 70(2): 127-143 (published: 24th October, 2018) Electronic supplement
abstract
Localities and records of Antrodiella citrinella (Basidiomycota, Polyporales) in the Czech Republic are summarised and the ecology of the species is evaluated. The 31 localities are mostly situated in mountain regions, the highest number of records coming from elevations of 1200–1299 m.Less frequently, A. citrinella is found in highland regions, growing either on slopes of hills or on steep slopes and bottoms of deep river or stream valleys. Most records are from montane and supramontane spruce forests and submontane to montane mixed forests dominated by beech, spruce and fir. The fungus also occurs in waterlogged spruce forests and ravine forests. Most of the localities are protected as nature reserves or strictly protected zones of national parks. Picea abies is a preferred substrate, followed by Abies alba, Fagus sylvatica, and basidiomata of Fomitopsis pinicola. Almost all records are from fallen trunks 10–100 cm in diameter, rarely stumps or pieces of wood. The wood decay stage is 2–5, its peak in stage 3. The main fructification period is autumn, mainly October and November, and spring from March to the first half of June with the maximum in May. Summer records are rare. A distribution map for the Czech Republic is published and data on occurrence in other European countries are compiled and discussed. The Czech distribution data are confronted with the GIS map layer of the Czech natural forests databank containing exact data on naturalness of forest stands. This analysis shows that A. citrinella clearly prefers virgin, natural and near-natural forest stands, i.e. old-growth forests, therefore it can be used as an indicator of this habitat.
DVOŘÁK D., BĚŤÁK J., TOMŠOVSKÝ M. (2014): Aurantiporus alborubescens (Basidiomycota, Polyporales) - first record in the Carpathians and notes on its systematic position. [Aurantiporus, phylogeny, old-growth forests, beech forests, indicator species] Czech Mycology 66(1): 71-84 (published: 4th June, 2014)
abstract
The authors present the first collection of the rare old-growth forest polypore Aurantiporus alborubescens in the Carpathians, supported by a description of macro- and microscopic features. Its European distribution and ecological demands are discussed. LSU rDNA sequences of the collected material were also analysed and compared with those of A. fissilis and A. croceus as well as some other polyporoid and corticioid species, in order to resolve the phylogenetic placement of the studied species. Based on the results of the molecular analysis, the homogeneity of the genus Aurantiporus Murrill in the sense of Jahn is questioned.
VAŠUTOVÁ M., DVOŘÁK D., BERAN M. (2013): Rare macromycetes from raised bogs in the Hrubý Jeseník Mts. (Czech Republic). [macrofungi, peatland, raised bog, distribution] Czech Mycology 65(1): 45-67 (published: 10th June, 2013)
abstract
During a mycobiota study of raised bogs in the Hrubý Jeseník Mts., the rare fungi Omphaliaster borealis, Galerina sphagnicola, Clavaria argillacea var. sphagnicola, Ramariopsis subarctica and Ascocoryne turficola were found. Descriptions and figures of microscopic characters, photos and a summary of the knowledge on the ecology and distribution of these species in Europe, and a brief comparison with similar species are given. The boreo-alpine species Omphaliaster borealis is reported from the Czech Republic for the first time. It can be confused with Arrhenia onisca in the field. Another species new to the Czech Republic, the strictly sphagnicolous Galerina sphagnicola, can be overlooked and confused with several other sphagnicolous Galerina species. The newly reported variety of Clavaria argillacea, var. sphagnicola, is distinguished from the nominate variety by shape and size of its spores, as well as its habit and ecology. Ramariopsis subarctica was known in the Czech Republic so far only from the Giant Mts. (Krkonoše). Within Europe, the two Czech localities, along with a find in the High Tatra Mts. (Slovakia), are the only ones known outside Fennoscandia. Ascocoryne turficola is reported from Moravia for the first time.
ANTONÍN V., BERAN M., BOROVIČKA J., DVOŘÁK D., HOLEC J. (2011): Clitocybula familia (Fungi, Agaricales) - taxonomy, distribution, ecology and first records in the Czech Republic and Slovakia. [var. familia, var. compressa, DNA studies, Europe, North America, old-growth forests, bioindication] Czech Mycology 63(1): 1-11 (published: 10th August, 2011)
abstract
The first records of Clitocybula familia from the Czech and Slovak Republics were studied and compared with the type specimen of C. familia var. compressa and several North-American collections of var. familia using macro– and microscopic characters as well as molecular data (LSU rDNA).All the collections were identical. Therefore, there is no need to recognise var. familia and var.compressa, as they represent the same taxon. Detailed macro– and microscopic descriptions are given.In Europe, the species grows on strongly decayed fallen trunks of Abies alba and Picea abies. All four Central-European localities represent valuable old-growth forests. Therefore, this species may be a bioindicator of such environments.
ANTONÍN V., BERAN M., DVOŘÁK D., HOLEC J. (2009): First records of Callistosporium pinicola in the Czech Republic and new findings on its ecology. [Callistosporium pinicola, taxonomy, distribution, bioindication, Ukraine] Czech Mycology 61(1): 1-12 (published: 29th September, 2009)
abstract
Callistosporium pinicola has been collected at ten localities in the Czech Republic. They represent the first records in this country. Three finds from Ukraine are published as well. Detailed macro– and microscopic descriptions of the species are provided. C. pinicola grows on strongly decayed fallen trunks of Abies alba and Picea abies, however, it has once also been found on a frondose tree. Its preference for old-growth forests with spruce and fir in the Czech Republic is discussed, including its possible usage as a local bioindicator of such forests. It is very interesting that all collections of C. pinicola in the Czech Republic are recent (collected in the period 2004–2008). It suggests that the species is spreading for unknown reasons. In Europe, C. pinicola usually occurs in localities fulfilling two conditions: a humid climate and strongly decayed wood.
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