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Introduction
Jan Douda currently works at the Faculty of Environmental Science, Czech University of Life Sciences Prague. Jan does research in Botany and Ecology. Their current project is 'COST Action CA16208 for enhancing management of European riparian ecosystems and services'. Lab webpages https://plant-ecology-lab-czu.com
Publications
Publications (45)
The diploid A. glutinosa (L.) Gaertn. is widespread throughout the European continent, except in the Iberian and Balkan Peninsulas where tetraploid populations have been discovered. We focused on the tetraploid species described as A. rohlenae Vít, Douda and Mandák that occupies the western part of the Balkan Peninsula, where it has likely complete...
Disturbance regime and site productivity are considered the main factors shaping plant species assemblages and community diversity in riparian ecosystems, but whether and how topographic indices correlate with these two predictors remains largely unexplored. In this study, the stream power index (SPI) and topographic wetness index (TWI) were calcul...
River valleys are considered natural corridors for migration of plant species; however, there is a lack of studies confirming higher colonisation rates of plant species in these areas. We compare plant species richness between ancient and recent forests (developed during and after the nineteenth century) and those located in a river valley with tho...
This paper comprises an overview of the riverine, swamp, floodplain forests and scrub
throughout the continent. The team of researchers from various European countries has
considered most of the forest habitats from the Canary Islands to European Russia. It
was a difficult task to gather all the knowledge about this type of vegetation across the...
Forest ecosystems are commonly characterised by a hierarchy of resources. During a disturbance of a forest community, increased light availability in the understorey can support competitive interactions at the expense of facilitation. This may overwhelm the role of belowground resource heterogeneity in maintaining species coexistence and so result...
River valleys are considered natural corridors for migration of plant species, however, there is a lack of studies confirming higher colonisation rates of plant species in these areas. We compare plant species-richness between ancient and recent forests, and those located in a river valley with those located in the surrounding landscape. We hypothe...
Species contributing high proportions to community biomass strongly influence ecosystem processes within the community. Studies have shown that dominant species may serve as nurse plants, helping to ensure biomass stability of the subordinate species under stress conditions. The question is widely debated as to whether either niche differentiation...
Diploid Alnus glutinosa s. str. and autotetraploid A. rohlenae form a narrow hybrid zone in a study area in southern Serbia, which results in triploid hybrid formation. The vast majority of previous studies have been focused on studies of maternal plants, but the offspring resulting from their crossing have not been much studied. Here, we use the v...
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...
Premise:
A set of polymorphic nuclear microsatellite loci was developed and tested for use in population genetic analyses of Anthericum ramosum (Agavaceae) and related species.
Methods and results:
Sequences of 110 primers were extracted in silico from Illumina MiSeq genome skimming data. The degree of polymorphism of 19 loci was tested in four...
Premise:
Microsatellite markers were developed for the perennial herb Salvia pratensis (Lamiaceae), a species representative of European dry grasslands. The development of microsatellite markers is needed for genetic and phylogeographical studies of species from the genus Salvia.
Methods and results:
We used low-coverage Illumina sequencing to i...
The centre‐periphery hypothesis (CPH) predicts a decrease in population performance from the centre of the species range towards the edge, hindering further species expansion. To overcome ecological limitation, local adaptation of peripheral populations is assumed necessary to extend niche space and thus to potentially facilitate species’ range exp...
The Holocene history of annual plant species is at best shadowy because, for most, the palaeobotanical data are scarce or absent. Hence, there is limited information on their glacial refugia and postglacial colonization pathways. Also, little is known on how human activity has affected their expansion. Here, we outline the joint influences of postg...
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...
Aim
We hypothesised that during the Holocene, the distributions of species such as crop weeds have been significantly influenced by human activity. We aimed to (a) identify the main centres of diversity of the Chenopodium album agg. species and (b) test if these species colonised Europe from western Asia, most likely due to the westward expansion o...
Hybridization and polyploidization represent an important speciation mechanism in the diploid-polyploid complex of the Chenopodium album aggregate. In the present study we successfully reconstructed the evolutionary histories of the majority of Eurasian representatives of the C. album aggregate, resulting in the most comprehensive phylogenetic anal...
The stress-gradient hypothesis predicts a switch from competition to facilitation, under increasing environmental stress. However, it is unclear how important is the change in competition-facilitation balance (i.e., the net outcome of plant-plant interactions) along the stress gradient in the regulation of community temporal stability (i.e., the in...
Aim
Differences in local β‐diversity (i.e., within‐site β‐diversity) along climatic and biogeographical gradients may result from regional differences in the importance of local community assembly processes (e.g. dispersal limitation and habitat filtering) or from regional differences in species pool sizes (i.e. species potentially able to colonize...
In the present study, we investigate the variation of European representatives of Alnus subg. Alnus, i.e., Alnus glutinosa and A. incana, in Europe and partly North Africa. Four distinct Alnus taxa were recognized using a multidisciplinary approach based on multivariate morphometrics, karyology, flow cytometry and nuclear microsatellite analyses. B...
Germination strategy is an essential mechanism that determines plant survival in previously established populations or newly colonised sites. Carex is a group of species that has shown difficulties to germinate experimentally and also many of them failed in order to use in restoration projects. Our aim was to determine whether Carex elata and C. el...
Heterocarpy enables species to effectively spread under unfavourable conditions by producing two or more types of fruit differing in ecological characteristics. Although it is frequent in annuals occupying disturbed habitats that are vulnerable to invasion, there is still a lack of congeneric studies addressing the importance of heterocarpy for spe...
The significance of the wide interspecific variation in nuclear genome size of angiosperms is still not fully understood. It has been repeatedly suggested, however, that genome size can impose phenotypic constraints on plant development, phenology and ecological performance. We analysed nuclear genome size variation in diploid and polyploid species...
Studies of perennial plants generally search for a seed size vs. seed number trade-off. Surprisingly, the fact that
perennials may replace an investment in large seeds by the allocation to vegetative propagation has not yet been investigated as an additional pathway enabling species coexistence. We focused on the mechanisms of coexistence in Carex...
1.Past management practices may continue to influence ecosystem functions and processes for decades, centuries or even longer after they have been abandoned. Until now, few researchers have attempted experiments which test the effects of restoring some of these past management practices on long-term community developmental trajectories.
2.Strong e...
Reticulate evolution is characterized by occasional hybridization between two species, creating a network of closely related taxa below and at the species level. In the present research, we aimed to verify the hypothesis of the allopolyploid origin of hexaploid C. album s. str., identify its putative parents and estimate the frequency of allopolypl...
Tremendous interspecific genome size variation is a well known phenomenon, whereas genome size within a species is supposed to be exceptionally stable and thus useful as a taxonomic trait. Using DAPI flow cytometry, we tested the stability of genome size in various representatives of Chenopodium s.s. (Amaranthaceae) across a broad geographical rang...
We reconstructed the historical pattern of postglacial biogeographic range expansion of the boreal tree species Alnus incana in Europe.
To assess population genetic structure and diversity, we performed a combined analysis of nuclear microsatellite loci and chloroplast DNA sequences (65 populations, 1004 individuals).
Analysis of haplotype and micr...
Abstract
Aim: Formalized classifications synthesizing vegetation data at the continental
scale are being attempted only now, although they are of key importance for nature
conservation planning. Therefore, we aim to provide a vegetation classification and
to describe themain biogeographical patterns of floodplain forests and alder carrs in
Europe....
Seed banks may play a crucial role in the maintenance of community diversity, but their role on semi-natural grasslands, one of the most species rich habitats in Europe, is usually unexplored in population and community studies. We aim to clarify how local factors and topography influence seed bank successional patterns on semi-natural alluvial mea...
Background and aims:
Polyploidy in plants has been studied extensively. In many groups, two or more cytotypes represent separate biological entities with distinct distributions, histories and ecology. This study examines the distribution and origins of cytotypes of Alnus glutinosa in Europe, North Africa and western Asia.
Methods:
A combined app...
Genetic admixture is supposed to be an important trigger of species expansions because it can create the potential for selection of genotypes suitable for new climatic conditions. Up until now, however, no continent-wide population genetic study has performed a detailed reconstruction of admixture events during natural species expansions. To fill t...
We investigated 39 previously developed Betula, Alnus, and Corylus simple sequence repeat (SSR) markers for their utility in the cross-generic amplification of two European alder species, i.e., Alnus glutinosa and A. incana. Of these markers, ten loci had successful amplification within Alnus species. Finally, we designed two multiplexes composed o...
Background/aims:
Recently, new palaeoecological records supported by molecular analyses and palaeodistributional modelling have provided more comprehensive insights into plant behaviour during the last Quaternary cycle. We reviewed the migration history of species of subgenus Alnus during the last 50,000 years in Europe with a focus on (1) a gener...
Questions: How have the historical frequency and severity of natural disturbances
in primary Picea abies forests varied at the forest stand and landscape level
during recent centuries? Is there a relationship between physiographic attributes
and historical patterns of disturbance severity in this system?
Location: Primary P. abies forests of the Ea...
It has been suggested that a heterogeneous environment enhances species richness and allows for the coexistence of species. However, there is increasing evidence that environmental heterogeneity can have no effect or even a negative effect on plant species richness and plant coexistence at a local scale. We examined whether plant species richness i...
Questions: What is the relative importance of landscape variables compared to habitat quality variables in determining species composition in floodplain forests across different physiographic areas? How do species composition and species traits relate to effects of particular landscape variables? Do lowland and mountain areas differ in effects of l...
• The secondary succession of wet grasslands to communities of alder carr dominated by Alnus glutinosa was recorded in different parts of Europe during the 20th century. However, knowledge of such development of alder carr remains insufficient.
• The development of alder carr was reconstructed at five sites in the Czech Republic, using historical a...
Keywords: aerial photograph / Alnus glutinosa (L.) Gaertn. / dendrochronology / land abandonment / secondary succession / wetland Abstract • The secondary succession of wet grasslands to communities of alder carr dominated by Alnus glutinosa was recorded in different parts of Europe during the 20th century. However, knowledge of such development of...
Spatial variability of humus properties in a natural fir-beech forest was studied along with the influence of windthrows and mesorelief on this variability. In 1720 windthrows the thickness and form of the organic horizons were studied in three positionsa-amound, pit, and undisturbed control. On undisturbed sites, substantial variability of thickne...
A formalized and supervised phytosociological classification of Alnion glutinosae and Alnion incanae in the Czech Republic is presented. Three associations of Alnion glutinosae (Thelypterido palustris-Alnetum glutinosae, Carici elongatae-Alnetum glutinosae and Carici acutiformis-Alnetum glutinosae) and seven of Alnion incanae (Alnetum incanae, Stel...
A hypothesis was verified that forest floor chemistry varies according to position within the windthrow (mound, pit, or control). A parallel assessment was made of differences in the chemistry of horizons and their forms. A total number of 1720 windthrows were Studied in the fir-beech primeval forest in the flysch zone of the Western Carpathians. A...
Projects
Projects (3)
European floodplain forests are among the most important habitats of river ecosystems that have been significantly degraded by human activity although they provide many important ecosystem functions and services. This project actively participates in the international cooperation of CONVERGES Knowledge conversion for enhancing management of European riparian ecosystems and services. The main goal of this project is to increase awareness of the importance of floodplain forests in relation to human activities and pressures (i.e., management practices, climate change).
The aim of the ROTATE Action is to support the biodiversity of organisms associated with traditional forms of forest management (coppicing, pollarding, leaf litter removal) in Central and Northern Europe. Interdisciplinary approach will ensure overcoming of existing barriers that prevent the introduction of knowledge into practice. The outputs will be processed in the form of scientific publications, workshops and conferences and in the form of an approved methodology that will reflect the needs of application guarantors. A wider transfer into practice and sustainability beyond the project is expected, which will be guaranteed by several application guarantors. The outputs will include monitoring of selected groups of organisms and ensuring long-term care of selected sites.
This action aims to establish a baseline in the state of knowledge regarding riparian vegetation, coordinate research efforts, contribute to knowledge conversion from science to practitioners and to COST Inclusiveness Target Countries and to promote practitioners research interests in the scientific community.
See : https://converges.eu
