Marek Polášek

Marek Polášek
Masaryk University | MUNI · Department of Botany and Zoology

Ph.D.

About

38
Publications
12,414
Reads
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325
Citations
Introduction
Marek Polášek currently works at the Department of Botany and Zoology, Masaryk University. Marek does research in Limnology, Entomology and Ecology. Their most recent publication is 'Notes on taxonomy of the genus Electrogena (Ephemeroptera: Heptageniidae) in Central Europe: a polyphasic approach.'.
Additional affiliations
January 2017 - January 2021
Masaryk University
Position
  • Researcher
Description
  • freshwater ecologist
January 2012 - January 2021
T.G. Masaryk Water Research Institute
Position
  • Researcher
Education
September 2008 - May 2011
Masaryk University
Field of study
  • hydrobiology

Publications

Publications (38)
Article
Full-text available
Small streams in the temperate continental region of central Europe have been recently exposed to frequent drying. We investigated the effects of drying on clitellate communities in 25 small streams evenly distributed along the gradient of flow intermittence. We observed that the community exposed to both irregular and periodic drying could maintai...
Article
Humans have severely altered freshwater ecosystems globally, causing a loss of biodiversity. Regulatory frameworks, like the Water Framework Directive, have been developed to support actions that halt and reverse this loss. These frameworks use typology systems that summarize freshwater ecosystems into environmentally delineated types. Within types...
Article
Full-text available
Many studies examining plant and terrestrial invertebrate communities have revealed the high conservation potential of spoil heaps. On the other hand, the freshwater communities inhabiting post‐mining ponds within these human‐made habitats are almost unexplored. We focused on aquatic macroinvertebrate, zooplankton and phytoplankton communities in t...
Article
Full-text available
River networks are among Earth’s most threatened hot-spots of biodiversity and provide key ecosystem services (e.g., supply drinking water and food, climate regulation) essential to sustaining human well-being. Climate change and increased human water use are causing more rivers and streams to dry, with devastating impacts on biodiversity and ecosy...
Article
Rivers are dynamic ecosystems in which both human impacts and climate‐driven drying events are increasingly common. These anthropogenic and natural stressors interact to influence the biodiversity and functioning of river ecosystems. Disentangling ecological responses to these interacting stressors is necessary to guide management actions that supp...
Article
Full-text available
With ongoing climate change and increasing water resource pressures, the knowledge and predictability of stream drying is essential for water management. However, the hydrological data for assessing the flow regime of temporary streams are often non-existent or scarce. The flow regime strongly affects stream ecological functioning and ecosystem pro...
Article
Groundwater-dependent ecosystems represent globally rare edaphic islands of scattered distribution, often forming areas of regionally unique environmental conditions. A stable groundwater supply is a key parameter defining their ecological specificity, promoting also soil thermal buffering. Still, a limited number of studies dealt with the importan...
Article
Full-text available
Intermittent stream research focuses mostly on pristine streams. The impacts of nutrient enrichment on invertebrate communities in these systems thus remains underexplored, especially in temperate climates. This study aimed to compare taxa survival during stream drying within pristine and nutrient-enriched sediment streambeds and to evaluate seedba...
Article
The cover image is based on the Original Article Drying in newly intermittent rivers leads to higher variability of invertebrate communities, by Julie Crabot et al., https://doi.org/10.1111/fwb.13673.
Article
• Aquatic invertebrate communities inhabiting intermittent rivers that are characterised by recurrent drying events (flow cessation or complete disappearance of surface water) often show rapid recovery upon flow resumption. Such rapid recovery is possible thanks to specific resistance and resilience traits that species adapted to river drying often...
Article
Full-text available
Dispersal is an essential process in population and community dynamics, but is difficult to measure in the field. In freshwater ecosystems, information on biological traits related to organisms' morphology, life history and behaviour provides useful dispersal proxies, but information remains scattered or unpublished for many taxa. We compiled infor...
Article
Full-text available
The influence of environmental factors on microbial community composition in a mountain river.-Acta Mus. Siles. Sci. Natur. 69: 75-88, 2020. Abstract: Microbial communities are known to be sensitive indicators for water pollution and biomonitoring assessment. In this study, we aimed at observation of microbial abundance and community composition in...
Preprint
Full-text available
Motivation: Dispersal is an essential process in population and community dynamics but is difficult to measure in the field. In freshwater systems, relevant information on the dispersal of many taxa remains scattered or unpublished, and biological traits related to organisms morphology, life history and behaviour offer useful dispersal proxies. We...
Article
Full-text available
Intermittent rivers and ephemeral streams (IRES) may represent over half the global stream network, but their contribution to respiration and carbon dioxide (CO2) emissions is largely undetermined. In particular, little is known about the variability and drivers of respiration in IRES sediments upon rewetting, which could result in large pulses of...
Article
Groundwater‐dependent ecosystems are recognized as biodiversity hotspots being, apart many negative human impacts, highly threatened also by ongoing climate warming. Clitellata (Annelida) are dominant invertebrates of permanent fauna in spring habitats, representing a heterogeneous group including both specialized cold stenothermic and ubiquitous e...
Article
Temporary streams are becoming increasingly common, but ecological responses to streambed drying are poorly characterized in the temperate continental region of central Europe. In addition, global research has focused on community responses to drying, whereas effects on individual populations remain unknown. We explored the population structure of...
Preprint
1. Intermittent streams are naturally dominant landscape features of Mediterranean and arid regions, but also occur more and more in humid climates, such as in the Czech Republic. Organism abilities to cope with drying (i.e. resistance forms) have been quantified in naturally intermittent streams from Mediterranean and arid regions, in which long-t...
Article
Intermittent streams are naturally dominant landscape features of Mediterranean and arid regions, but also occur more and more in humid climates, such as in the Czech Republic. Organism abilities to cope with drying (i.e. resistance forms) have been quantified in naturally intermittent streams from Mediterranean and arid regions, in which long-term...
Article
Many streams in the extensive Central European region have an intermittent flow regime. Conventional hydrological methods used to identify zero-flow conditions, and in particular drying events, have limited use when assessing large areas dominated by low-order streams. We developed a novel multimetric index to recognise antecedent stream drying bas...
Article
Little is known about macroinvertebrate assemblages inhabiting aquatic-terrestrial transition zones, particularly at groundwater-fed wetlands. We studied diversity and vertical distribution of Dipteran assemblages in 27 spring fens characterised by variable groundwater chemistry ranging from acidic to extremely calcium rich. We sampled semiaquatic...
Article
Full-text available
The genus Electrogena Zurwerra & Tomka, 1985 is a diverse mayfly group in the Western Palaearctic with a partially unclear taxonomy, even in well-examined areas such as Central Europe. Recently, one of the species belonging to this genus, Electrogena ujhelyii (Sowa, 1981), was identified as a complex of genetically and geographically separated spec...
Article
Full-text available
The easy, fast and correct identification of species is a crucial aspect of biology and its applications, such as biomonitoring and nature conservation. One of the groups that are common but not easily to identify are mayflies at the larval stage. In recent years, many attempts to species identification using modern and non-traditional methods have...
Article
We provide the first commented checklist of Armenian mayflies, based on all relevant literature and recent extensive sampling of 72 localities throughout Armenia during 2011, 2014, and 2015. Altogether 46 species are listed, eight of them reported from Armenia for the first time. One new species, Ecdyonurus (Ecdyonurus) eurycephalus sp. nov. is des...
Article
Full-text available
Perennial rivers and streams make a disproportionate contribution to global carbon (C) cycling. However, the contribution of intermittent rivers and ephemeral streams (IRES),which sometimes cease to flow and can dry completely, is largely ignored although theymay represent over half the global river network. Substantial amounts of terrestrialplant...
Article
Full-text available
In the version of this Article originally published, the affiliation for M. I. Arce was incorrect; it should have been: ⁵Leibniz Institute of Freshwater Ecology and Inland Fisheries (IGB), Berlin, Germany. This has now been corrected in the online versions of the Article.
Conference Paper
Full-text available
An initial checklist of mayflies (Ephemeroptera) of Iran compiled based on the literature data and new data from the north-western Iran reported only 46 species and 25 genera.
Article
Full-text available
An initial checklist of mayflies (Ephemeroptera) of Iran is compiled based on critical review of available literature data, complemented with new data from 38 localities of Gilan and Ardabil provinces. At present, altogether only 46 species and 25 genera are known from Iran, 18 species are reported as new to Iran in this study. Some previously publ...

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Projects

Projects (3)
Project
Vision: In studied area with high biotope diversity obtain as many informations as possible for the purposes of follow-up projects and public education. Goals: • inventory of aquatic organisms - permanent fauna and larvae of temporary fauna - hydrobiological sampling; adults of insects - sweeping, Malaise traps, light traps • Monitoring of aquatic habitats – changes of communities in the space • Changes of communities in the time – the cuttoff streams in the area of braided river • Changes of communities depending on land use and degradation of stream morphology • Monitoring other environmental parameters - physicochemical (pH, conductivity, oxygen, temperature), chemical and microbiological parameters of water. Currently, the species inventory is completed and collected data are analyzed.
Project
We aim to describe the diversity of Iranian Ephemeroptera along main geographical and ecological gradients within Iran. We visited the north Iran (Guilan, Ardabil, Mazandaran, Golestan, and North Khorasan provinces), Zagros Mts and also lowlands in the south west Iran in 2016-2018. As a result, we collected mayflies at more than 150 localities. At present, we are working on the processing of collected material and descriptions of new species.
Archived project
Validation of bioindication methods as tools for sustainable management of intermittent streams in Central European region, their transfer into the practice