Mariusz Pelechaty

Mariusz Pelechaty
Adam Mickiewicz University | UAM · Institute of Environmental Biology

Professor

About

137
Publications
38,831
Reads
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1,077
Citations
Citations since 2016
66 Research Items
776 Citations
2016201720182019202020212022020406080100120140
2016201720182019202020212022020406080100120140
2016201720182019202020212022020406080100120140
2016201720182019202020212022020406080100120140
Introduction
I work on aquatic macrophytes, mainly charophytes (Characeae), lake ecology, hydrochemistry and biomonitoring. Currently, my main research topics are: Ecology and world-wide distribution of a rare charophyte, Lychnothamnus barbatus Stable C and O isotope composition of carbonates precipitated by extant charophytes as a tool for palaeoreconstructions Charophyte distribution, ecology and importance for water quality Intrabiocoenotic interactions in lakes, with a special role of aquatic vegetation
Additional affiliations
October 1999 - present
Adam Mickiewicz University
Position
  • Lecturer
Description
  • laboratories, classes, lectures in Polish and English, MSc students, PhD students
October 1999 - present
Adam Mickiewicz University
Position
  • Professor (Associate)
Description
  • Aquatic macrophytes, Characeae, C and O isotope composition of charophyte carbonates, lake ecology
Education
October 1995 - September 1999
Adam Mickiewicz University
Field of study
  • Biological science, biology
September 1990 - June 1995
Adam Mickiewicz University
Field of study
  • Biology, hydrobiology

Publications

Publications (137)
Article
Full-text available
The hornwort Ceratophyllum demersum is a loosely attached to the bottom or free-floating vascular macrophyte, which builds dense stands in nutrient-rich waters. The hornwort stands are usually monospecific communities with a negligible contribution of other aquatic plants. However, some published literature data and our own observations evidenced t...
Article
A significant portion of calcium carbonate is deposited in lake sediments as a result of biological processes related to the photosynthetic activity of phytoplankton in the pelagic realm and, in addition, macrophytes in the littoral zone. Lake Wigry, one of the largest lakes in Poland (north-east Poland), is characterized by: (i) carbonate sediment...
Article
Full-text available
Stable isotope composition (δ13C and δ18O) was analysed in mineral incrustation of Chara rudis and surrounding waters. This macroalga forms dense and extensive charophyte meadows and may significantly contribute to the calcium carbonate precipitation and deposition of marl lake sediments. The study aimed to find out if charophyte calcium carbonate...
Article
This study presents a newly discovered site of Lychnothamnus barbatus, one of the rarest charophytes worldwide of a disjunctive, Euro-Australasian-American distribution. The species is the only representative of the genus Lychnothamnus on a global scale, hence its threat poses a risk of extinction to the entire lineage. In June 2019, Lychnothamnus...
Poster
Full-text available
Many aquatic primary producers are able to use bicarbonates as a carbon source for photosynthesis. Quite efficient in this process are charophytes of the two genera: Chara and Nitellopsis. Some species of these macroalgae produce calcite encrustations constituting up to 70% of the summer maximum dry weight of standing crop. In this study, we analys...
Conference Paper
Full-text available
W ostatnich latach zaobserwowano w środkowej Europie proces rekolonizacji i kolonizacji, zaś w USA proces kolonizacji nowych stanowisk przez Lychnothamnus barbatus, zagrożony gatunek ramienicy (Characeae). Jednym z przykładów rekolonizacji jest Jezioro Kuźnickie (zach. Polska), gdzie gatunek ten obecnie dominuje w fitolitoralu, a rekolonizacja zbie...
Conference Paper
Full-text available
Ramienice i rośliny naczyniowe skutecznie kontrolują liczebność i skład fitoplanktonu w jeziorach, ale różnią się mechanizmami interakcji makrofity-fitoplankton, które dodatkowo mogą być modyfikowane przez cechy klimatu. Stąd też, w przedstawionych badaniach porównano skład i biomasę zespołów fitoplanktonu w dwóch typach jezior: z roślinnością zdom...
Conference Paper
Full-text available
Celem pracy jest analiza struktury letnich zbiorowisk fito- i zooplanktonu oraz roślinności wodnej po serii coraz cieplejszych zim 2018-2020. Zbadano pokrycie gatunków hydromakrofitów w stałych transektach, skład i liczebność pelagicznego fito- i zooplanktonu oraz chemizm wody w płytkim, makrofitowym Jeziorze Wielkowiejskim (Wielkopolski PN). W opa...
Conference Paper
Full-text available
This study compares the composition and biomass of phytoplankton assemblages in two types of lakes with abundant vegetation dominated by charophytes (Chara-lakes) and angiosperms (Potamogeton-lakes). These two groups of submerged macrophytes effectively control the phytoplankton abundance and composition in lakes but differ in the feedback mechanis...
Conference Paper
Full-text available
In this study, multiple species distribution models (SDMs) were used to reveal the potential climatic habitats and ranges of Lychnothamnus barbatus which is one of the rarest charophytes worldwide and the only extant representative of the genus Lychnothamnus. We aimed to (1) indicate the most reliable SDM for this rare hydrophyte; (2) determine the...
Article
Full-text available
Due to human–caused eutrophication and rapid environmental changes, charophytes have become an increasingly rare component of biosphere. One of the rarest charophyte worldwide is Lychnothamnus barbatus, the only extant representative of the genus Lychnothamnus. The species occurs in Europe, Asia, Australia and North America, but the number of locat...
Article
Full-text available
This study aimed to determine the relationships between the abundance of Nitellopsis obtusa, a controversial charophyte, locally red-listed in its native Eurasian range but invasive in North America, and the species diversity of macrophyte stands dominated by N. obtusa. Three lakes of different morphology, productivity and catchment were surveyed i...
Article
The aims of our research were: 1) to study the changes in the quantitative and qualitative structure of submerged macrophytes relative to the physical and chemical characteristics of water in a model lake dominated by the endangered charophyte Lychnothamnus barbatus, 2) to test the overwintering of total macrophytes and L. barbatus in different win...
Article
Full-text available
To determine the drivers of phytoplankton biomass, we collected standardized morphometric, physical, and biological data in 230 lakes across the Mediterranean, Continental, and Boreal climatic zones of the European continent. Multilinear regression models tested on this snapshot of mostly eutrophic lakes (median total phosphorus [TP] = 0.06 and tot...
Article
Full-text available
In a time of rapid environmental changes, identification of the effects of climate warming on charophytes (Characeae, Charophyta) will enable the optimization of conservation measures, especially for extremely rare species. Lychnothamnus barbatus is one of the rarest charophytes worldwide, which has decreased in the number of occupied sites over th...
Conference Paper
Full-text available
One of the greatest threats for temperate lakes is the warming of winters, the rainfall and drainage catchment the intensification, followed by a trophy increase in and a biodiversity drop. This research aimed to investigate the influence of climatic factors on the dynamics of macrophytes in a lake co-dominated by common vascular plants and the end...
Article
Full-text available
The recovery or reconstruction of aquatic vegetation has recently been reported as a result of water quality improvement after anthropogenic eutrophication. The objectives of this study were: to investigate long-term trends in aquatic vegetation abundance in relation to decreasing water fertility and to present new directions in changes of the subm...
Article
Full-text available
We conducted year-round, monthly monitoring of the stable isotope composition of DIC and water in hypereutrophic Lake Kierskie, western Poland, along with isotope measures of calcite collected in sediment traps installed at 16 and 30 m water depth in the lake. Isotope data were supplemented by previously published data on physico-chemical variables...
Article
Full-text available
Accurate lake sediment-derived palaeoenvironmental reconstructions require in-depth knowledge on sediment record formation processes. In order to understand formation of laminated sediments in the eutrophic Lake Kierskie (western Poland) we conducted a year-round (November 2015–October 2016), monthly sediment trap study along with physico-chemical...
Article
Full-text available
Four Chara lakes, differing in their morphological features, physico-chemical water properties, catchment area characteristics and human pressure, were studied in order to recognize the influence of the charophyte PVI, proportion in the phytolittoral zone and species composition on phytoflagellate community. In one lake, the proportion of vegetatio...
Article
Full-text available
Factors that strongly affect morphological features and reproductive effort of charophytes (Charophyta, Characeae) are the depth of occurrence and light availability. Eutrophication of waters and global warming change the level and transparency of waters. As a response to light limitation, an elongation of the charophyte thallus and a decrease in t...
Article
Full-text available
The paper presents the first data on the concentrations of heavy metals (Cd, Pb, Zn, Cu, Ni, Cr, Mn) and ¹³⁷ Cs and their contamination ratios (CR) in the most abundant species of macrophytes in the Vistula Lagoon. No significant differences in the concentrations of heavy metals and ¹³⁷ Cs between macrophyte taxa or the influence of rivers flowing...
Conference Paper
Full-text available
Lychnothamnus barbatus is used as a bioindicator of oligo-mesotrophic waters. While the number of L. barbatus occupied sites decreased in the last century, new sites have been described and the recolonization of the former sites has been observed in recent decades, for instance in Lake Kuźnickie (Poland), a meso-eutrophic water body, where we analy...
Conference Paper
Full-text available
Lake Lednica (W Poland, 339.1 ha, 15.1 m) is a Historical Monument of the Polish Nation that due to a long history of settlement is a known centre of archaeological, ethnographic, limnological and paleolimnological studies. It is also a regional charophyte hot-spot with 12 out of 34 Polish charophyte species. Stabile nowadays, charophyte vegetation...
Article
Gyrogonites (calcified oospores) of charophytes are commonly used in palaeoecology. Although, the study of morphometry and gyrogonite production by extant charophytes is limited. This concerns the genus Lychnothamnus, frequent in the past but contemporarily represented only by L. barbatus, the rare and endangered species applied in assessment of wa...
Article
Small waterbodies and oxbow lakes play an important role as hotspots of biodiversity and landscape diversity, supplying a range of ecosystem services. However, they are at risk of disappearing. Thus, there is a need for the threats to their existence to be recognised. In this study we aimed to determine whether land uses within small and larger are...
Article
Full-text available
Under ongoing climate change and increasing anthropogenic activity, which continuously challenge ecosystem resilience, an in-depth understanding of ecological processes is urgently needed. Lakes, as providers of numerous ecosystem services, face multiple stressors that threaten their functioning. Harmful cyanobacterial blooms are a persistent probl...
Conference Paper
Full-text available
The aim of the study was to analyse the production and morphometry of gyrogonites of Lychnothamnus barbatus, one of the rarest and most endangered species of charophytes worldwide, in the depth gradient of the species occurrence. Gyrogonites were picked from L. barbatus tally (n = 170) collected at three depths (minimum, maximum and mean, n = 3 for...
Poster
Full-text available
Differences in charophyte overwintering between mid-western and north-eastern Poland Małgorzata Strzałek1*, Elżbieta Biardzka1, Lech Kufel1, Mariusz Pełechaty2 & Andrzej Pukacz3 1 Faculty of Natural Sciences, Siedlce University of Natural Sciences and Humanities, Prusa 14, 08–110 Siedlce, Poland 2 Faculty of Biology, Adam Mickiewicz University, U...
Conference Paper
Full-text available
Is one shell enough? Isotope study of recent mollusc shells and its application in palaeoenvironmental reconstructions Karina Apolinarska1, Mariusz Pełechaty2, Annette Kossler3, Eugeniusz Pronin2, Daria Noskowiak1 1Institute of Geology, Faculty of Geographical and Geological Studies, Adam Mickiewicz University, Krygowskiego 12, 61-680 Poznań, Polan...
Conference Paper
Full-text available
Lychnothamnus barbatus (Bearded stonewort) is one of the rarest species of charophytes in the world. This species is the only representative of the genus Lychnothamnus. In the past, the disappearance of sites of this species was observed. The main cause of this phenomenon was the anthropogenic water eutrophication. In recent years, we have observed...
Conference Paper
Full-text available
The study presented was performed in a large Chara-lake (Lake Lednica, western Poland, 339.1 ha, max. and mean depths of 15.1 m and 7.0 m, respectively) subject to a long-term anthropogenic pressure in which charophyte vegetation recovered at the turn of millennia, after a significant water eutrophication, the decrease in the submerged vegetation a...
Conference Paper
Full-text available
In urban Lake Kierskie (Western Poland) distinct, however discontinuous, varve deposits were observed in the lower and uppermost Holocene sediment sequence. Varves occurring in the uppermost 50 cm of the sediment sequence are linked with man induced eutrophication of the lake. To recognize the conditions of these varves deposition sediment traps we...
Poster
Full-text available
In aquatic environment submerged macrophytes are a key contributor to the circulation of elements, particularly of carbon, which is transformed from assimilated CO2 into the plant biomass. Organic carbon can subsequently be deposited in the bottom sediment and it can potentially become largely unavailable in a time perspective longer than the annua...
Article
Lychnothamnus barbatus, one of the rarest and endangered charophytes world-wide, is a bioindicator of low water trophy. This study was carried out in a moderately fertile water body hosting a large population of L. barbatus (Lake Kuźnickie, Poland). In this lake, L. barbatus co-occurs in submerged vegetation with higher trophy indicators, aquatic a...
Conference Paper
Full-text available
Among aquatic macrophytes, applied in the assessment of the trophic status of waters, macroscopic algae from the family Characeae indicate low water fertility. One of the rarest and most endangered charophytes worldwide , Lychnothamnus barbatus, is commonly applied as a bioindicator of oligo-mesotrophic waters. This study was carried out in Lake Ku...
Article
Full-text available
Insight into how environmental change determines the production and distribution of cyanobacterial toxins is necessary for risk assessment. Management guidelines currently focus on hepatotoxins (microcystins). Increasing attention is given to other classes, such as neurotoxins (e.g., anatoxin-a) and cytotoxins (e.g., cylindrospermopsin) due to thei...
Article
Full-text available
Insight into how environmental change determines the production and distribution ofcyanobacterial toxins is necessary for risk assessment. Management guidelines currently focus onhepatotoxins (microcystins). Increasing attention is given to other classes, such as neurotoxins (e.g.,anatoxin-a) and cytotoxins (e.g., cylindrospermopsin) due to their p...
Presentation
Produkcja oospor i gyrogonitów przez Lychnothamnus barbatus w kontekście głębokości występowania i cyklu rozwojowego gatunku w umiarkowanie żyznym jeziorze. Production of oospores and gyrogonites by Lychnothamnus barbatus in the context of the depth of occurrence and the life cycle of the species in a moderately fertile lake.
Article
Full-text available
Oxygen (δ¹⁸O) and carbon (δ¹³C) stable isotope analyses are among the standard methods applied in the studies of past environment, including climate. In lacustrine sediments, δ¹⁸O and δ¹³C values can be measured in various carbonates including charophyte encrustations. Application of the stable isotope record of lacustrine carbonates requires knowl...
Conference Paper
Full-text available
Out of six genera representing extant charophytes (Characeae) Lychnothamnus (Ruprecht) Leonhardi em. A. Braun is a monotypic genus, represented by the only extant species, Lychnothamnus barbatus (Meyen) Leonhardi. About 50 sites of L. barbatus are known currently and more than 60 localities have disappeared since the end of the 19th century, mainly...
Conference Paper
There is still little known about cyanobacteria in oligo- and mesotrophic hard-water lakes dominated by charophyte vegetation (Chara-lakes). In such ecosystems, through various mechanisms (e.g. nutrient trapping, intensified sedimentation of particles from the water column and discharge of allelopathic substances), charophytes affect the qualitativ...
Conference Paper
Full-text available
Out of six genera representing extant charophytes (Characeae) Lychnothamnus (Ruprecht) Leonhardi em. A. Braun is a monotypic genus. Today it is represented by the only extant species, Lychnothamnus barbatus (Meyen) Leonhardi, considered rare and in decline worldwide. More than 60 localities of L. barbatus have disappeared since the end of the 19th...
Poster
Full-text available
Lychnothamnus barbatus is a rare, endangered charophyte species applied as a reliable bioindicator of less fertile waters, mainly lakes. Its fossilized and calcified oospores (gyrogonites)are used in palaeoecological studies as an indicator of past oligotrophic conditions. The aim of this research was topresent a case study from a lake in which L....
Poster
Full-text available
Phycological studies of Lake Jarosławieckie (Wielkopolski National Park) dates back to the early 1950s of the twentieth century, and initially focused on charophytes. The first comprehensive hydrobiological studies, including phytoplankton research, were carried out in the 1970s of the last century. Since the 1990s the frequency and range of studie...
Conference Paper
Full-text available
Lychnothamnus barbatus to rzadka i zagrożona wymarciem w skali świata ramienica. Jednakże, w ostatnich latach obserwujemy ekspansję L. barbatus, kolonizację i rekolonizację zbiorników wodnych. Jezioro Kuźnickie jest umiarkowanie eutroficznym ekosystemem, który został zrekolonizowany i zdominowany przez L. barbatus, skutecznie konkurujący o zasoby i...
Conference Paper
Full-text available
Carbon (δ13C) and oxygen (δ18O) stable isotope analyses are among the standard methods applied in the studies of past environment, including climate. In lacustrine sediments, δ13C and δ18O values can be measured in fine carbonate fraction (carbonate mud), in charophyte encrustations, ostracod carapaces and mollusc shells. Application of the stable...
Article
Lychnothamnus barbatus (Meyen) Leonhardi is a rare, endangered charophyte species considered to be a reliable indicator of low water fertility, with its fossilized gyrogonites (calcified oospores) being applied as a biomarker of past oligotrophic conditions. This paper presents a case study from a lake in which L. barbatus occurs abundantly under e...
Article
Full-text available
The study focuses on the inter- and intra-specific variability in δ13C and δ18O values of shells and opercula of gastropods sampled live from the littoral zone of Lake Lednica, western Poland. The δ13C and δ18O values were measured in individual opercula of Bithynia tentaculata and shells of Bithynia tentaculata, Gyraulus albus, Gyraulus (A.) crist...
Article
For practical reasons, cyanobacteria attract scientific interest in eutrophicated, often degraded water bodies. Much less attention is paid to blue-greens in less fertilized lakes, including a group of macrophytic lakes with vegetation dominated by charophytes (Chara-lakes). In this study, therefore, two small, mid-forest Chara-lakes with negligibl...
Conference Paper
Full-text available
Aquatic macrophytes are commonly applied in the assessment of the trophic status of waters. Among bioindicators of low water fertility representatives of macroscopic algae, charophytes (Characeae), are utilized. An example of species that is considered indicative of oligo – mesotrophic waters is a charophyte, Lychnothamnus barbatus, one of the rare...
Article
Full-text available
The month-to-month variability of biomass and CaCO3 precipitation by dense charophyte beds was studied in a shallow Chara-lake at two depths, 1 and 3 m. Charophyte dry weights (d.w.), the percentage contribution of calcium carbonate to the dry weight and the precipitation of CaCO3 per 1 m2 were analysed from May to October 2011. Physical-chemical p...
Article
Two charophyte species (Chara tomentosa Thulli. 1799 and Chara globularis L. 1753) were studied to assess their biomass and CaCO 3 production in seven hard-water lakes in Western Poland. In each lake, samples of ten individuals from three study sites were collected for dry weight (DW) and calcium carbonate content (% CaCO 3 ) analyses. Additionally...
Article
Full-text available
The stable carbon isotope composition of the carbonate encrustations (δ13CCARB), organic matter (δ13CORG) and the dissolved inorganic carbon (δ13CDIC) in the ambient lake waters were analysed for two common but morphologically different and, thus, representing different growth forms Chara species. We hypothesized that the relationships between δ13C...
Conference Paper
Full-text available
Ecological plasticity of Lychnothamnus barbatus: implications for biomonitoring of contemporary aquatic environments and palaeoenvironmental reconstructions Mariusz Pełechaty, Michał Brzozowski Adam Mickiewicz University, Faculty of Biology, Department of Hydrobiology, Umultowska 89, 61-614 Poznań, Poland Lychnothamnus barbatus, the only extant rep...