Jan Roleček

Jan Roleček
Institute of Botany of the ASCR · Department of Paleoecology

PhD

About

112
Publications
32,705
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2,300
Citations
Citations since 2016
62 Research Items
1536 Citations
2016201720182019202020212022050100150200250300
2016201720182019202020212022050100150200250300
2016201720182019202020212022050100150200250300
2016201720182019202020212022050100150200250300
Introduction
I work at the Institute of Botany, Czech Academy of Sciences, and at the Department of Botany and Zoology, Masaryk University, Brno, Czech Republic. I am interested in the diversity, ecology and history of vegetation, particularly of oak forests and steppe grasslands in Central and Eastern Europe.
Additional affiliations
January 2004 - present
Masaryk University
Position
  • Professor (Assistant)

Publications

Publications (112)
Article
Aim: To propose a modification of the TWINSPAN algorithm that enables production of divisive classifications that better respect the structure of the data.Methods: The proposed modification combines the classical TWINSPAN algorithm with analysis of heterogeneity of the clusters prior to each division. Four different heterogeneity measures are invol...
Article
Full-text available
East-central European semi-dry grasslands hold several world records in small-scale vascular plant species richness. However, the reasons for the peculiarity of these grasslands are not well known, which hinders a better understanding of the mechanisms of species coexistence.We suggest that one of the reasons for this gap in our knowledge is the la...
Article
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The European semi-dry grasslands belong to the most species-rich vegetation types of the northern hemisphere and form an important part of habitat mosaics of the forest-steppe zone. However, a comprehensive evaluation of compositional variation and phytosociological classification of these grasslands is still missing. For our syntaxonomic revision,...
Article
Full-text available
Aim Pollen has been used before to reconstruct Holocene plant diversity changes in broadly delimited regions such as continents and countries. In this study we ask whether finer‐scale differences in plant diversity, which are of interest to biogeographers and ecologists, are also detectable in the fossil pollen record coming from a single, biogeogr...
Article
Continentality is a globally significant gradient influencing broad-scale biogeographical patterns. An excellent example is the transition from the European temperate forest biome to the continental steppe and forest-steppe of Eurasia. One of the biogeographic crossroads where the two biomes meet is the Western Podillia in the western part of Ukrai...
Article
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Mitigating the effects of global change on biodiversity requires its understanding in the past. The main proxy of plant diversity, fossil pollen record, has a complex relationship to surrounding vegetation and unknown spatial scale. We explored both using modern pollen spectra in species-rich and species-poor regions in temperate Central Europe. We...
Article
Despite a long-term human impact, Central and Eastern Europe exhibit patches of steppe ecosystems having the highest plant species diversity worldwide. These unique ecosystems have persisted over millennia even though the local climatic conditions would support the formation of a closed forest. Several sources of disturbances have contributed to th...
Article
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We report new maxima of vascular plant species richness ever recorded in 10-m2 plots (115 and 110 species in two adjacent plots). Both come from a steppe meadow at a well-known site Valea Lui Craiu, located in the Fânaţele Clujului grassland complex close to the city of Cluj in Transylvania, Romania, where maximum values have been observed before....
Article
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Aim: The steppe grasslands of eastern Central Europe are exceptionally species-rich and valuable from a nature conservation point of view. However, their historical biogeography is still poorly understood. Here we use the regional diversity of habitat specialists and chloroplast DNA data to investigate potential long-term refugia of steppe species...
Article
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One promising area in understanding the responses of plants to ongoing global climate change is the adaptative effect of polyploidy. This work examines whether there is a coupling between the distribution of cytotypes and their biogeographical niche, and how different niches will affect their potential range. The study uses a range of techniques in...
Article
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Here I report the first find of Ophrys insectifera in Ukraine since 1920. A single individual was found at its last recorded site, Chortova Hora near Rohatyn (Ivano-Frankivsk Region). The species occurs in a steppe meadow habitat situated in the lower part of a steep northern slope. Local vegetation may be classified to a broadly circumscribed asso...
Article
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Aims Understanding fine-grain diversity patterns across large spatial extents is fundamental for macroecological research and biodiversity conservation. Using the GrassPlot database, we provide benchmarks of fine-grain richness values of Palaearctic open habitats for vascular plants, bryophytes, lichens and complete vegetation (i.e., the sum of the...
Article
Aim: Forest-steppe complexes in the peri-Carpathian region harbour specific vegetation dominated by tall herbs. Our aim was to provide new phytosociological data on this vegetation type from the Ukraine and adjacent parts of Romania, compare it with previously published data, discuss its position in broad ecological and biogeographical context and...
Article
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Deciduous thermophilous oak forests (phytosociological class Quercetea pubescentis) are among the most species-rich and most endangered forest communities in central Europe. Thanks to the varied topography, bedrock, biogeographical influences and rather well-preserved semi-natural and near-natural forest vegetation, Slovakia harbours a diverse heri...
Article
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The rare Ladybells Adenophora liliifolia was found after 75 years near the village of Žehuň in the Elbe River Basin, the Czech Republic. It is listed among critically endangered species in the Czech Red List and among plant species of Community interest in Annex II to the European Union’s Habitats Directive. The authors discovered a small populatio...
Technical Report
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Soupis druhů nalezených během Speciálního botanicko-zoologického cvičení v terénu na Litomyšlsku (31. 8.-4. 9. 2020) Pořádající instituce Ústav botaniky a zoologie, Přírodovědecká fakulta, Masarykova univerzita, Kotlářská 2, 611 37 Brno, tel. 549491439, fax 549498331
Article
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Palaeoecological analyses of old peat deposits can bring information on the past distribution of bryophyte species. In this paper, we report historical occurrence of fen mosses that are currently rare and declining in Central Europe. This paper brings new data about the presence of fen mosses in old peat deposits in (i) the forest-steppe zone of Uk...
Article
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Carex buxbaumii is an interesting species of the Czech flora. Similarly to other parts of Central Europe, it is a rare species, preferring calcareous fens and open-canopy alder carrs, often at sites where its relict survival from older periods may be assumed. A rich population at Hrabanovská černava Fen is a unique one, as the sedge is a vegetation...
Article
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Liliová hora hill near Luleč is an important locality of thermophilous flora in the Vyškov region, already mentioned in the classic botanical works of the end of the 19th and the beginning of the 20th century. In later years, however, relatively little data were published about the local flora and some information is available only in herbaria. The...
Article
The extreme species richness of some temperate grasslands is a globally relevant yet understudied phenomenon. Until now, few records from thoroughly sampled, though not permanently fixed, vegetation plots were available. We therefore established a network of 40 permanent 4 × 4-m2 plots in species-rich grasslands of the White Carpathians (Czechia),...
Preprint
Full-text available
Aims Reconstruction of the Holocene diversity changes in a biogeographically complex region. Description of major diversity patterns, testing their predictors, and their interpretation in the palaeoecological and biogeographical context. Testing the assumption that pollen record is informative with respect to plant diversity in our study area. Met...
Preprint
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Pollen is an abundant fossil and the most common proxy for plant diversity during the Holocene. Based on datasets in open, forest, and mixed habitats, we used the spatial distribution of floristic diversity to estimate the source area of pollen diversity and identify factors influencing the significance of this relationship. Our study areas are Boh...
Article
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Abstrakt: Červený seznam biotopů České republiky hodnotí riziko zániku pro 157 typů přirozených a polopřirozených biotopů vymezených ve druhém vydání Katalogu biotopů České republiky. Hodnocení bylo provedeno podle metodiky pro Červený seznam ekosystémů Mezinárodního svazu ochrany přírody (IUCN) v úpravě použité v Evropském červeném seznamu biotopů...
Article
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We analysed a continuous andwell-dated record of pollen, non-pollen palynomorphs, geochemistry and plant macroremains from the best preserved peat bog in the Bohemian-Moravian Highlands (Czech Republic). Dářko peat bog is an isolated site of a pine bog woodland dominated by the central-European endemic Pinus uncinata subsp. uliginosa. It is protect...
Article
Forest vegetation is dominated by long-lived species in the tree layer, which facilitates its relatively high inertia and ability to conserve traces of its history in its structure and species composition. Central European lowland forests have been the subject of diverse human use for millennia and some of the present stands still show remnants of...
Article
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Oak-hornbeam forests (order Carpinetalia) are a widespread vegetation type in central Europe. As vegetation ecologists focused on them since the pioneering times of vegetation research,many syntaxonomic units are described. However, classification systems used in various central-European countries suffer from inconsistencies and overlaps of the con...
Article
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Here we report the third extant site of Viola jooi in Ukraine. The species was found on an open calcareous scree in the valley of the Tlumach stream near Ostrynia village (Tlumach District, Ivano-Frankivsk Region). Vegetation of the scree may be classified to a broadly circumscribed alliance Stipion calamagrostis or to its east-central European cou...
Article
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GrassPlot is a collaborative vegetation-plot database organised by the Eurasian Dry Grassland Group (EDGG) and listed in the Global Index of Vegetation-Plot Databases (GIVD ID EU-00-003). Following a previous Long Database Report (Dengler et al. 2018, Phytocoenologia 48, 331–347), we provide here the first update on content and functionality of Gra...
Article
Here we report the first find of a rare grass Festuca amethystina L. in the Transylvanian Basin. The species was found at Dealul Furcilor, a hill that is part of SCI Movilele de la Păucea near the city of Mediaş, in tall-forb vegetation classified as Trollio europaei-Clematidetum recti association. Using flow cytometry we detected tetraploid ploidy...
Article
Aims: Western Podolia is one of several regions in the Eurasian forest-steppe zone where diverse steppe vegetation has been relatively well preserved. Our aims were to describe compositional turnover of steppe vegetation along different environmental gradients, to identify the patterns of species richness and evenness across complete compositional...
Article
Knowledge of the species composition of invaded vegetation helps to evaluate an ecological impact of aliens and design an optimal management strategy. We link a new vegetation analysis of a large dataset to the invasion history, ecology and management of Robinia pseudoacacia stands across Southern Europe and provide a map illustrating Robinia distr...
Poster
Full-text available
We present a revised and unified classification system of Quercetea pubescentis class in Slovakia. To assess target vegetation units we used a large data set of relevés of the Slovak forest vegetation obtained from national phytosociological database of Slovakia and private databases stored in Turbowin. Starting dataset consisted of 15 714 relevés...
Article
Full-text available
We report new maximum values of vascular plant species richness ever recorded at 10 m2 and 16 m2-plots. Both come from sites where world record species numbers were reported before but from different plot size or with indication of different management regime. Our results support the view that extreme species richness is a temporally stable feature...
Article
Understanding pollen-vegetation relationships is crucial for accurate land-cover and climate reconstructions, yet important parameters for quantifying past vegetation abundance are mostly unknown for large parts of Europe harbouring temperate thermophilous ecosystems. We collected pollen and vegetation data in central-eastern Europe, a region cover...
Article
The Red List of Habitats of the Czech Republic assesses the risk of collapse for 157 types of natural and semi-natural habitats defined in the second edition of the Habitat Catalogue of the Czech Republic. The assessment followed the guidelines for the IUCN Red List of Ecosystems as used in the European Red List of Habitats project, using the crite...
Article
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Two finds of Lemonia spp. from the Bohemian-Moravian borderland are reported. Lemonia dumi was observed in October 2000 on an extensively managed meadow close to the village of Svinná near Česká Třebová (Eastern Bohemia). Lemonia taraxaci was found in August 2005 on an extensively managed pasture in Švařec National Nature Monument close to the vill...
Article
The south‐western White Carpathians (Czech Republic, Slovakia) are one of the few places in low‐elevation Central Europe where a diverse landscape, including extremely species rich meadows, scattered oak trees and mixed oak woodlands, has escaped modern transformation. We studied C14‐dated and taxonomically identified macroscopic soil charcoal reco...
Article
Full-text available
GrassPlot is a collaborative vegetation-plot database organised by the Eurasian Dry Grassland Group (EDGG) and listed in the Global Index of Vegetation-Plot Databases (GIVD ID EU-00-003). GrassPlot collects plot records (relevés) from grasslands and other open habitats of the Palaearctic biogeographic realm. It focuses on precisely delimited plots...
Article
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Fluctuations in intensity of human impact and corresponding vegetation changes have been reported from different parts of Europe for the period from the beginning of the 1st millennium ad to the high Middle Ages. In the Bílé Karpaty mountains (White Carpathians), a region well-known for its biologically valuable ancient grasslands, an extensive spr...
Article
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Půda má paměť. Nepřetržitě se vyvíjí a ve své struktuře a složení ukládá informace o tom, čím prošla. Mnohé se časem ztratí, zapomene, přepíše informacemi novými. Ale mnohé zůstává v půdě uloženo po tisíciletí. Pokud máme nezbytné znalosti, ovládáme potřebné postupy a přeje nám štěstí, můžeme tyto informace vyhledat, rozkódovat a dozvědět se tak ně...
Article
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Ruská lesostep. Představa, která asi leckomu voní exotikou a dobrodružstvím. A po kulturní i cestovatelské stránce skutečně může výprava do ní podobná očekávání naplnit. Botanikovi se naopak může stát, že jeho nejsilnějším dojmem bude zážitek blízkosti zdejší přírody k té naší, středoevropské.
Article
The disjunct occurrence of Pedicularis exaltata in the White Carpathians (Czech Republic), isolated by more than 500 km from the nearest populations in the Eastern Carpathians, has been considered one of the mysteries of the Western Carpathian flora. We used molecular methods (AFLP, ITS and cpDNA sequencing) to reconstruct a possible scenario of th...
Article
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Picris hieracioides (Asteraceae) is a polymorphic species with a complicated taxonomy. Here we report the occurrence of Picris hieracioides subsp. umbellata in the Czech Republic, a subspecies that has not been recognized in modern fl oras of this area. The identity of the recently found population in the White Carpathian Mts. was determined based...
Article
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Perotis lugubris (Fabricius, 1777) is a large, conspicuous jewel beetle associated with fruit trees in Europe and Western Asia. In Central Europe, it used to occur as far north as Silesia. During the 20th century, however, the range of this species contracted substantially. It has disappeared from Poland and was considered extinct in the Czech Repu...
Article
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Transformation of coppices to high forests has caused fundamental changes in site conditions and a decline of many species across Central Europe. Nevertheless, some formerly coppiced forests still harbour a number of the declining species and have become biodiversity hotspots in the changing landscape. We focused on the best-preserved remnant of fo...
Article
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We report on flora and vegetation of an abandoned military shooting range in Dráby forest near Vysoké Mýto, Eastern Bohemia. We found a hitherto unknown population of a critically endangered Taraxacum cognatum (sect. Palustria) and several other valuable species of base-rich intermittently wet sites such as Tetragonolobus maritimus, Centaurium pulc...
Article
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Aims: Classification of vegetation is an essential tool to describe, understand, predict and manage biodiversity. Given the multiplicity of approaches to classify vegetation, it is important to develop international consensus around a set of general guidelines and purpose-specific standard protocols. Before these goals can be achieved, however, it...
Book
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The botanical guide was prepared for the 58th Annual Symposium of the International Association for Vegetation Science (IAVS), held in Brno in the Czech Republic on 19–24 July 2015. After an introduction and a brief description of geography and biogeography of Moravia, 16 botanical sites discribed: 1 Žďár Hills (1a Dářko National Nature Reserve, Lo...
Article
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Krumlovský les Forest and its surroundings (south-western Moravia, Czech Republic) comprise a large woody area on the south-eastern edge of the Bohemian Massif. Although the forests in the region are extensive and relatively well preserved, their ecology and species composition are poorly studied. Therefore, we conducted a field survey between 2011...
Article
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Vegetation is a dynamic system of interacting plant populations. In spite of this dynamism, different vegetation types exhibit a variable amount of inertia in species composition. For this reason, the current vegetation of Central Europe is a heterogeneous mixture of plant communities of different age, depending not only on site conditions, but als...
Article
This paper introduces the results of a fl oristic and phytosociological survey of the Dubová stráň Nature Monument. The site is situated in the southern part of the Bohemian-Moravian Highlands and represents a strip of well-preserved oak-hornbeam forest and regionally rare thermophilous oak forest on the slopes of the Moravská Dyje river valley. Th...
Article
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A peripheral site of thermophilous oak forest vegetation in Eastern Bohemia is reported from Střemošická stráň Nature Reserve near the town of Luže, Chrudim district. Our findings support the view that Vraclavský hřbet Ridge is an important outpost of thermophilous vegetation in Eastern Bohemia. The eastern boundary of distributional range of therm...
Article
Erica tetralix belongs to biogeographically distinctive members of the flora of the Czech Republic, with clear oceanic tendency in distribution and with Czech sites forming the southeastern edge of the species' distributional range. The origin of its occurrence at most localities, and thus its native status in the Czech flora, however, remains ques...
Article
Quercus frainetto is a typical species of semi-dry forests of the Balkan Peninsula. The northern border of its natural distribution has by many authors been placed in the SE part of Central Europe. In the Czech Republic, the only well-documented occurrence has been known from the neighbourhood of the town of Znojmo, SW Moravia. A new site was disco...
Article
Hybrids in the genus Carex occur quite frequently. However, only one hybrid with C. fritschii as a parental species has been reported to date. In 2010, plants with an appearance transitional between C. caryophyllea and C. fritschii were found at two sites in southern Moravia, Czech Republic. The results of morphological and anatomical analysis show...
Article
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Turkey is home to more Quercus species than any other country in the western Palaearctic. To what extent is the taxonomic diversity reflected in compositional diversity of oak woodland vegetation? What are the main compositional gradients, their environmental correlates and associated gradients in species traits? How are the oak woodland types in T...
Article
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The Southern Urals are an inspiring place for Czech naturalists. This paper provides basic information on this seldom visited region and describes the impressions of two Czech biologists from their excursion to this place. The nature of the Sou­thern Urals captivated them with its wildness, unrivalled in present-day Central Europe, its intrinsic or...
Article
QuestionsIs the herb layer species diversity and composition in species-rich oak-dominated forests related to the (i) soil nitrogen (N) pool, (ii) foliar N concentration, and (iii) foliar 15N/14N isotope ratio (δ15N), as indicators of the N status in ecosystems? How do they correspond to the Ellenberg indicator value for N (EIV-N) of the herb layer...
Article
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Lappula semicincta (Boraginaceae), a critically threatened species of the Czech flora, has been reported to occur in the Czech Republic in just a small area in south-western Moravia. The last record dates from 1980. During a field survey and a search in four regional herbaria, we recorded two extant populations of the species and found specimens fr...
Article
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Flora, vegetation and habitat conditions of a rare type of wetland occurring on serpentine bedrock near Bory village by the town of Velké Meziříčí are described. The fen meadow harbours many basiphilous species of vascular plants (e.g., Blysmus compressus, Carex distans, C. paniculata, Eriophorum latifolium) and mosses (e.g., Cratoneuron filicinum,...