Jakub Těšitel's research while affiliated with Masaryk University and other places

Publications (120)

Article
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Invasive alien species can have severe negative impacts on natural ecosystems. These impacts may be particularly pronounced within ecological communities, where alien species can cause local extinctions. However, it is unclear whether individual alien plant species consistently occur in species-poor or species-rich communities across broad geograph...
Article
This article comments on: Philipp Giesemann and Gerhard Gebauer, Distinguishing carbon gains from photosynthesis and heterotrophy in C3-hemiparasite–C3-host pairs, Annals of Botany, Volume 129, Issue 6, 12 May 2022, Pages 647–656 https://doi.org/10.1093/aob/mcab153
Article
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• Surviving the seedling phase is crucial for the establishment of plant individuals and populations. In ecosystems with dynamic water availability such as temperate grasslands, seedlings should adjust their growth strategy not only to match the current conditions but also to secure resource acquisition in the future. Here, we explored evolutionary...
Article
Rising temperatures may endanger fragile ecosystems because their character and key species show different habitat affinities under different climates. This assumption has only been tested in limited geographical scales. In fens, one of the most endangered ecosystems in Europe, broader pH niches have been reported from cold areas and are expected f...
Conference Paper
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Question: Infrequent events of extreme drought or extreme temperatures may considerably affect the structure and functioning of vegetation. Here we ask how fluctuations in precipitation and temperature shape year-to-year dynamics and plant species composition in a dry grassland community, and how this variation affects plants with different life hi...
Article
Questions Herbivory is a fundamental ecological interaction underlying energy and mass flow between primary producers and consumers. The ecological theory describes plant biomass quality in terms of food for herbivores as a functional effect trait. We asked how leaf functional traits affect insect herbivory in a species-rich meadow community. Loca...
Article
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The Pladias (Plant Diversity Analysis and Synthesis) Database of the Czech Flora and Vegetation was developed by the Pladias project team in 2014-2018 and has been continuously updated since then. The flora section of the database contains critically revised information on the Czech vascular flora, including 13.6 million plant occurrence records, w...
Article
All organisms engage in parasitic relations, as either parasites or hosts. Some species may even play both roles simultaneously. Among flowering plants, the most widespread form of parasitism is characterized by the development of an intrusive organ called the haustorium, which absorbs water and nutrients from the host. Despite this functionally un...
Article
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Parasitic plants are mostly viewed as pests. This is caused by several species causing serious damage to agriculture and forestry. There is however much more to parasitic plants than presumed weeds. Many parasitic plans exert even positive effects on natural ecosystems and human society, which we review in this paper. Plant parasitism generally red...
Article
Question Habitat‐specific species pools are shaped by ecological and evolutionary processes such as speciation, extinction, and migration. However, their role is poorly known because of the lack of robust data on species pools across a large number of plant community types and large areas. Here, we analyse a unique dataset of species pools of diagn...
Experiment Findings
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Plant species richness on permanent plots evaluated monthly (Feb-Dec/2019). The 42 plots are 50x50 cm² and are distributed on 7 blocks along a dry grassland (Festucion valesiacae) in the Pavlov Hills, SE Czech Republic.
Article
Plant invasions cause biodiversity loss and degradation in ecosystems worldwide. The invasive species involved may be introduced, or native invaders, and controlling them is a major global challenge. Here, we highlight an emerging role for native parasitic plants in suppressing invasive species, thus aiding in restoration of affected habitats. Comp...
Article
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Question: Infrequent events of extreme drought or extreme temperatures may considerably affect the structure and functioning of vegetation. Here we ask how fluctuations in precipitation and temperature shape year-to-year dynamics and plant species composition in a dry grassland community, and how this variation affects plants with different life hi...
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
Fens have well‐developed bryophyte layer covering most of the ground. Non‐sphagnaceous bryophytes, especially the group of so‐called brown mosses, prevail over sphagna under alkaline conditions. In sub‐alkaline conditions, rich fens allow the co‐occurrence of these both functional groups, but sphagna are competitively superior over non‐sphagnaceous...
Conference Paper
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Recently available extensive datasets on plant distributions across the whole national floras and on functional traits of such floras, and increasing availability of fine-scale information on the abiotic environment make it possible to explore the trends in plant traits across geographical space and explain them as a function of large-scale environ...
Article
Aim Climate is an important factor controlling plant distributions. However, it is not yet fully understood how climate interacts with human impacts or whether the effects of these factors differ between native and alien species. Facing ongoing climate change and urbanization, we explore the effects of climate on plant species richness and composit...
Article
Forest management decisions may have unintentional effects on what they were originally not designed for, including effects on woodland species and communities. In protected areas of coastal dune woodlands, some sites are fenced as a part of forestry management. In this study, we hypothesised that different states of disturbance (disturbed vs non-d...
Article
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Questions European native laurophyllous species are interesting for their biogeography and evolutionary history, as well as for their responses to global changes. We identified Italian native laurophylls on the basis of morphology, biogeographical history and ecological niche to study whether these species are in equilibrium with the present‐day cl...
Article
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Root-hemiparasitic plants of the genus Rhinanthus acquire resources through a water-wasting physiological strategy based on high transpiration rate mediated by the accumulation of osmotically active compounds and constantly open stomata. Interestingly, they were also documented to withstand moderate water stress which agrees with their common occur...
Data
ANOVA table of linear models describing the effects of irrigation treatment and sampling place (leaf/bract) on the density of stomata on abaxial and adaxial leaf and bract sides of parasitic Rhinanthus alectorolophus. Factor Leaf/bract represents the effect of sampling place on stomatal density. Significant terms (P<0.05) are in bold. df: degrees o...
Data
Höfler plot (A) and pressure–volume curve (p–v curve, B) revealing water relation parameters of flowering Rhinanthus alectolophus. The turgor loss point, which is usually defined as the first point of linearly decreasing segment of a p–v curve (light grey), was hard to determine due to hyperbolic shape of the p–v curve. To reduce the error of the d...
Data
ANOVA table of linear models describing the effect of irrigation treatment on the above-ground biomass and its stable-isotopic composition of parasitic Rhinanthus alectorolophus. δ13C and δ18O represent the isotopic composition of the parasite biomass. Significant terms (P<0.05) are in bold. df: degrees of freedom; SS: sum of squares; F: F statisti...
Data
Seedling survival data and all data collected from adult plants, except for pressure-chamber data. D and W refer to parasitized low and high irrigation pots. HD and HW refer to non-parasitized low and high irrigation pots. Additional abbreviations used are explained in individual data sheets (in green). (XLS)
Data
ANOVA table of linear models describing the effects of irrigation treatment, leaf water saturation, and their interaction on photosynthetic and transpiration rate of parasitic Rhinanthus alectorolophus. Factor Saturated represents the effect of leaf saturation by water on the hemiparasite parameters. Significant terms (P<0.05) are in bold. df: degr...
Data
ANOVA table of linear models describing the effects of irrigation treatment, osmotic potential of leaves subjected to gas exchange measurements, and their interaction on photosynthetic and transpiration rate of parasitic Rhinanthus alectorolophus. Significant terms (P<0.05) are in bold. df: degrees of freedom; F: F statistics; p: significance level...
Data
ANOVA table of linear models describing the effects of irrigation treatment, infection by the parasitic Rhinanthus alectorolophus, harvest day, and their interactions on the host (Triticum aestivum) above-ground biomass and its stable-isotopic composition. Factor Infected represents the effect of parasitic infection on host parameters. δ13C and δ18...
Data
ANOVA table of linear models describing the effects of irrigation treatment, plant species, and their interaction on the stable-isotopic composition (δ13C and δ18O) of host (Triticum aestivum) and parasite (Rhinanthus alectorolophus) above-ground biomass. Factor Plant represents the effect of plant species on isotopic parameters. δ13C and δ18O repr...
Data
The recovery of wilted Rhinanthus alectorolophus (A and C) from severe drought stress several hours after re-watering (B and D). One non-flowering and one flowering individuals are shown. Note the effect of drought stress on wheat, which was used as a host species. (PDF)
Data
Stomatal density on leaves (A) and bracts (B) of hemiparasitic Rhinanthus alectorolophus grown under high (W+) and low irrigation treatments (W–). Both adaxial and abaxial sides are presented. n = 9 for W+ leaves, n = 5 for W–leaves, n = 9 for W+ bracts, and n = 7 for W–bracts. (PDF)
Data
Pressure-chamber data. Each plant measurement is displayed on a separate sheet. D and W refer to parasitized low and high irrigation pots. D21 measurement was used for Figures A and B in S1 Fig. (XLSX)
Article
Mixotrophic plants combine photosynthesis and heterotrophic nutrition. Recent research suggests mechanisms explaining why mixotrophy is so common in terrestrial ecosystems. First, mixotrophy overcomes nutrient limitation and/or seedling establishment constraints. Second, although genetic drift may push mixotrophs to full heterotrophy, the role of p...
Article
Root‐hemiparasitic interaction between the dominant grass Calamagrostis epigejos and hemiparasitic Thesium linophyllon was studied to assess the potential of the parasite to regulate dominance of the grass expanding into species‐rich steppe grasslands. First, we aimed at identification of physiological links between the two species as a principal i...
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
• Melampyrum pratense is an annual root‐hemiparasitic plant growing mostly in forest understorey, an environment with unstable light conditions. While photosynthetic responses of autotrophic plants to variable light conditions are in general well understood, light responses of root hemiparasites have not been investigated. • We carried out gas exch...
Article
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Can hemiparasitic Rhinanthus major originating from a local population suppress the competitive clonal grass Calamagrostis epigejos and reverse its expansion in species-rich semi-natural grasslands? Does sowing seeds of R. major facilitate restoration of target meadow vegetation? Is R. major more beneficial for biodiversity restoration/conservation...
Article
Root hemiparasites are green plants which attach to roots of other plants and extract solutes from the host-root xylem parasitically. They frequently act as keystone species by affecting competitive relations in plant communities and altering mineral nutrient cycling. Understanding their ecology has been hindered by the difficulty to identify host...
Article
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Dominance of native or alien competitive plants causes competitive exclusion of subordinate species and represents a major mechanism reducing biodiversity following land-use changes. The successful competitive strategies may however be interfered with by parasitic plants, which withdraw resources from other plants’ vasculature. Parasitism may stron...
Article
Is the incidence of root hemiparasitic plants in non-forest vegetation associated with high diversity? Are root hemiparasites more associated with species-rich vegetation than other species? Czech Republic. Plot size-corrected species richness, Shannon diversity and Pielou's evenness were computed for a representative set of 18 101 vegetation plots...
Article
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Questions: How do spatial patterns of tree distribution and species co-occurrence differ between primary and secondary tropical rain forests? What signatures of ecological processes might be discerned by comparing the spatial patterns of trees between primary and secondary forest plots? Location: Tropical rain forest vegetation, lowlands of Papua N...
Article
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Background and aims - Rhinanthus major (= R. angustifolius) and Melampyrum nemorosum are very sensitive to mowing date. As they are annuals without a long-term persistent seed bank and with a poor long-distance dispersal ability, seed loss caused by an unsuitable mowing date could lead to rapid population decline. Since their populations have disap...
Article
Background and aims – The resource flows in the host-hemiparasite association have been frequently studied by applying stable isotope techniques. However, these methods of artificial labelling required sophisticated equipment preventing their application to field experiments. Here, we aimed to test the applicability of the 15N13C-urea foliar brushi...
Article
Background - Parasitic plants are functionally specialized to acquire at least some essential resources from other plants via specialized organs called haustoria. Parasitism evolved 12 times independently in the evolution of angiosperms of which approximately 1% (4500 species) are parasitic. Not only are parasitic plants diverse in terms of evoluti...
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Může být dálnice zelenou páteří krajiny? Takto položená otázka možná na první pohled působí jako naprostá ignorance všeho, co doposud víme o silniční dopravě a jejích negativních dopadech na životní prostředí. Přesto bychom se neměli nechat unést prvotní představou betonové D1 s nekonečnými kolonami. Dálnice totiž nejsou jen proudy automobilů, smog...
Article
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Biotopy a ekologické niky kořenových poloparazitů: zhodnocení na základě velké fytocenologické databáze
Article
Root hemiparasites from the rhinanthoid clade of Orobanchaceae possess metabolically active glandular trichomes that have been suggested to function as hydathode trichomes actively secreting water, a process that may facilitate resource acquisition from the host plant's root xylem. However, no direct evidence relating the trichomes to water secreti...
Article
Demey et al. (2015, this issue) present evidence that root hemiparasitic plants can affect their host community through selectively parasitizing the species within it (with large differences between host species within functional groups), and by promoting seedling establishment through creating gaps. The hemiparasite needs to maintain the host for...
Article
Root hemiparasites are green photosynthetic plants, which parasitically acquire resources from host xylem. Mineral nutrients and water, two principal below-ground abiotic resources, were assumed to affect the interaction between hemiparasites and their hosts. The shape of these effects and the underlying physiological mechanisms have, however, rema...
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The sampling skills of three common European fish species (Barbus barbus, Chondrostoma nasus and Squalius cephalus) were tested to assess their potential as biomonitors of past changes in river water quality through the analysis of diatoms in fish guts. The study was performed on three rivers with different chemical and physical conditions. Compari...
Article
Scapania undulata is an aquatic dioicous liverwort growing in shallow streams in boreal to subtropical zones. We studied the expressed sex ratio, sex-specific differences in shoot architecture and possible trade-off between sexual and asexual reproduction in ten populations of S. undulata by surveying 100 plots in ten streams in southern Finland. T...
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The development of vegetation in Arctic glacier forelands has been described as unidirectional, non-replacement succession characterized by the gradual establishment of species typical for mature tundra with no species turnover. Our study focused on two early colonizers of High Arctic glacier forelands: Saxifraga oppositifolia (Saxifragaceae) and B...
Article
QuestionsWhat are the factors limiting the establishment of hemiparasitic Rhinanthus spp., ecosystem engineers promoting diversity and stability of communities, in restoration of species-rich meadows? How can these constraints be overcome? LocationCzech Republic, Central Europe. Methods Sowing of Rhinanthus seeds in grasslands of different history,...
Article
Polyploidy is widely recognized as a major mechanism of sympatric speciation in plants, yet little is known about its effects on interactions with other organisms. Mycorrhizal fungi are among the most common plant symbionts and play an important role in plant nutrient supply. It remains to be understood whether mycorrhizal associations of ploidy-va...
Article
The Rhinanthoid clade of the family Orobanchaceae comprises plants displaying a hemiparasitic or holoparasitic strategy of resource acquisition. Some of its species (mainly Rhinanthus spp.) are often used as models for studies of hemiparasite physiology. Although there is a well‐developed concept covering their physiological processes, most recent...
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Melampyrum pratense is one of the most successful root-hemiparasitic species of temperate Europe occurring in various habitats including both forest and open communities. The species shares its life history traits (large seeds, annuality, lack of clonality) with most of other hemiparasitic Orobanchaceae. Due to lack of vegetative propagation, the r...
Article
In their recent study, Borowicz and Armstrong (Oecologia 169:783-792, 2012) investigated effects of nutrient availability and competition for light on a perennial root hemiparasite Pedicularis canadensis. Their study showed a reduction of community productivity as a result of hemiparasite infection independently of a clear positive effect of increa...
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Based on differences in chromosome number two cytotypes were reported in the Odontites vernus group in central Europe by earlier studies. These cytotypes were also considered to correspond to two seasonal ecotypes that differ in phenology, morphology and ecology. In this study, we conducted a broad screening of central European populations of the O...