Judita Koreiviene

• PhD
• Chief Researcher at Nature Research Centre

In response to global warming, an increase in cyanobacterial blooms is expected. In this work, the response of two native species of Planktothrix agardhii and Aphanizomenon gracile, as well as the response of two species alien to Europe—Chrysosporum bergii and Sphaerospermopsis aphanizomenoides—to gradual temperature increase was tested. The northe...

This study describes the first report on saxitoxins (STXs) and anatoxin-a (ANTX-a) production by cyanobacteria in Lithuanian lakes. Seasonal fluctuation patterns for neurotoxins were determined in samples collected from eutrophic lakes during July–September. Strains of Aphanizomenon gracile, A. flos-aquae, Cuspidothrix issatschenkoi, Sphaerospermop...

Global warming and eutrophication contribute to formation of HABs and distribution of alien cyanobacteria northward. The current study assessed how alien to Europe Sphaerospermopsis aphanizomenoides and Chrysosporum bergii will co-occur with dominant native Planktothrix agardhii and Aphanizomenon gracile species under changing conditions in tempera...

Industry, transport and unsustainable agriculture result in the increased quantity of wastewater, release of nutrients and emission of carbon dioxide that promotes eutrophication of water bodies and global climate change. The application of microalgae for phycoremediation, their biomass use for human needs may increase sustainability and have a pos...

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...

Objective In recent decades, the invasive cyanobacteria Raphidiopsis raciborskii and Raphidiopsis mediterranea have expanded their distribution globally, particularly in temperate regions. Understanding the ecological drivers of Raphidiopsis distribution is imperative to addressing the challenges associated with these species. Here, we aimed to cha...

We examined the feeding ecology of planktonic crustaceans at three waterbodies situated across a latitudinal gradient in Europe (Croatia, Poland, Lithuania) using stable isotope measurements (δ 13 C, δ 15 N) in animal tissues. Relative, lake-specific values of δ 15 N showed that in all lakes, calanoid copepods occupied the highest trophic position,...

The presence of autotrophs, heterotrophs and mixotrophs among euglenoid taxa, multiple means of nutrition, and high tolerance to a wide range of thermal living conditions contribute to their colonization of various types of water bodies in different climatic zones. The formation of water “blooms” by euglenoids occurs during accelerated development...

In recent years, cyanobacterial invasions have increased in European temperate lakes. Climate warming is highlighted as a key driver of the distribution and establishment of alien cyanobacteria, and water bodies in poor ecological status, characterized by meso-eutrophic conditions, are underlined as a suitable habitat for invasion. The establishmen...

Climate change has increased the frequency, duration and intensity of heatwaves in Europe. These extreme events result in alterations of physical, chemical, and biological properties of lakes that may synergistically promote cyanobacterial dominance. In our study we focused on cyanobacterial blooms in lakes distributed over a longitudinal gradient...

Iki Antrojo pasaulinio karo Šepetos pelkė buvo žinoma kaip šiaurės rytų Lietuvoje plytinti 1 398,9 ha ploto aukštapelkė. Nuo 1939 m. pelkė eksploatuojama ūkio reikmėms. Šiuo metu visas pelkės masyvas sunaikintas. Buvusį kraštovaizdį išsaugojo tik ją supantys pelkiniai miškai, o informacija apie jos gamtą išliko tik publikuotuose šaltiniuose. Iki XX...

Cyanobacteria can form blooms and pose a threat to the functioning of freshwater ecosystems. Cyanobacterial invasions are expected to increase due to climate change. Alien species cause a decline in biodiversity by displacing native species, lead to extinctions, affect food webs, and produce cyanotoxins which potentially impact the environment and...

Citizen science could be a helpful tool that combines ecological research with environmental education. The questionnaire proposed by the project ,,AlgaeService for LIFE" will facilitate understanding the knowledge gaps in society about cyanobacterial blooms, the threats posed by cyanotoxins, people's attitudes toward the problem, and the best sour...

Monodominant (one species dominates) or polidominant (multiple species dominate) cyanobacterial blooms are pronounced in productive freshwater ecosystems and pose a potential threat to the biota due to the synthesis of toxins. Seasonal changes in cyanobacteria species and cyanometabolites composition were studied in two shallow temperate eutrophic...

Aphanizomenon flos-aquae can form extensive blooms from freshwater to the brackish environment and, being a diazotrophic species, contribute significantly to the nitrogen and carbon cycle. It occurs as single filaments or aggregates and could be used as an alternative nutrients source for bacteria and ciliates. Ciliates are a group of organisms pla...

Cladophora glomerata macroalgae biomass is a natural resource derived from water bodies that have been extensively described due to their numerous benefits and ability to produce biomass [1], which is potentially valuable due to its antioxidant activity, particularly when looking for animal feed alternatives. The aim of this study was to investigat...

Growing concern about environmental challenges has led to the development of new observation tools to perform monitoring and assessment in a broad range of environments, application to conservation management and for mapping of natural resources. Although, the emerging methods and technologies of remote sensing are a powerful tool, they meet some d...

Macroalgae are a natural resource derived from water bodies that is widely described due to their multiple benefits and ability to produce biomass. Potentially beneficial traits of the macroalgae Cladophora glomerata, especially nutrients, are important when looking for animal feed alternatives to traditional ones to expand a more sustainable food...

Freshwater macroalgae produces a wide range of bioactive compounds, and interest in utilizing its biomass is growing rapidly. Meanwhile, exploiting renewable sources for biomass collection could lead to more sustainable biotechnological chains. The aim of this study was to investigate Cladophora glomerata biomass from Lithuanian rivers as a potenti...

Studies of the diversity and distribution of freshwater cyanophages are generally limited to the small geographical areas, in many cases including only one or few lakes. Data from dozens of various lakes distributed at a larger distance are necessary to understand their spatial distribution and sensitivity to biotic and abiotic factors. Thus, the o...

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...

A scientific justification, focused on the development of the sustainability of feed ingredients and farm animals’ ecosystems, is required. Thus, it is crucial to search for alternative feed materials from natural sources for potential applications. The aim of this study was to evaluate the prospective utilization of freshwater Cladophora glomerata...

The bloom‐forming freshwater alga Gonyostomum semen is associated with acidic, mesotrophic brown water lakes in boreal regions. However, researchers have been unable to conclusively link G. semen abundance and bloom formation to typical brown water lake traits, i.e. high water color and DOC (dissolved organic carbon) concentrations. Iron is a main...

Studies of the diversity and distribution of freshwater cyanophages are generally limited to the small geographical areas, in many cases including only one or few lakes. Data from dozens of various lakes distributed at a larger distance are necessary to understand their spatial distribution and sensitivity to biotic and abiotic factors. Thus, the o...

Citation: Savadova-Ratkus, K.; Mazur-Marzec, H.; Karosienė, J.; Kasperovičienė, J.; Paškauskas, R.; Vitonytė, I.; Koreivienė, J. Interplay of Nutrients, Temperature, and Competition of Native and Alien Cyanobacteria Species Growth and Cyanotoxin Production in Temperate Lakes. Toxins 2021, 13, 23.

Vasaros neįsivaizduojame be maudynių ežeruose ar upėse, prie kurių skubame atsigaivinti ir pailsėti karštą dieną. Tačiau atvykę prie vandens telkinio kartais matome akiai ir maudynėms nepatrauklų vaizdą – vandens paviršius pasidengęs melsvai žalios spalvos plėvele – vanduo „žydi“ ir ne visi susimąstome ar saugu maudytis tokiame „žydinčiame“ vandens...

Kiekvienas susiduriame su nuolat besikeičiančia aplinka, o pastaraisiais metais stiprėjantis klimato kaitos poveikis kelia vis didesnį susirūpinimą. Klimato šiltėjimas (prognozuojamas vidutinės metinės oro temperatūros padidėjimas, trumpesnis pastovios sniego dangos laikotarpis, metinio kritulių kiekio sumažėjimas, škvalas ir kt.) yra įvairialypis,...

‘Algae Service for LIFE’, the project supported by the European Union, seeks to promote best practices in ecological service and the circular economy by implementing innovative complex system of three interlinked elements: i) prototypes for harvesting of cyanobacteria and macroalgae biomass; ii) distant methods for surveying of the blooms and defin...

EU international project of LIFE programme “Algae Service for LIFE” seeks to promote best practices in ecological service and development of circular economy. The goal of the project is to demonstrate integrated efficient management of nutrients and nuisance algal blooms at the catchment scale by harvesting cyanobacteria scums and macroalgae mats i...

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...

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...

Research on biological processes for wastewater treatment (WWT) over the past decade has focused on the development of compact treatment processes at the expense of a high energy demand or a loss of valuable nutrients. The recent worldwide interest in the cultivation of microalgae for energy production, along with the need for more sustainable WWT...

In this chapter, cell disruption techniques are reviewed as a function of the (future) industrial algae biorefinery. A variety of techniques and recent developments are discussed based on their effectiveness, product quality, and cost efficiency. Effectiveness (i.e, disruption efficiency in function of energy and time) unfortunately is often counte...

The staining of lipids in algae cells with Bodipy dyes is much less studied compared to Nile red; therefore, a complex of issues concerning staining details and fluorescence measurements still should be clarified for the species that vary in cell wall complexity. Nevertheless, some general guidelines could be given, and a preliminary protocol of th...

In Kamanos raised bog, the green algae community was represented by 160 taxa distributed into eight Chlorophyceae orders. The diversity of desmids (93 taxa) that are an essential algal component of raised bogs was most relevant. Chlorococcales comprised 30 taxa and Ulotrichales – 15 taxa. Representatives from the rest green algae groups were scarce...

Mechanisms behind expansion of an invasive cyanobacterium Cylindrospermopsis raciborskii have not been fully resolved and different hypotheses, such as global warming, are suggested. In the East-Central Europe, it is widely occurring in western part of Poland but only in single locations in the East due to some limiting factors. Therefore, broad sc...

The effect of the unicellular, bloom-forming alga Gonyostomum semen (Raphidiophyceae) on the survival rate and body size of Daphnia magna was tested under experimental laboratory conditions. Using samples from four humic lakes with a long history of Gonyostomum blooms, we exposed D. magna for 72 h to various Gonyostomum treatments which included ho...

Hydrochloric acid, acetyl chloride and boron trifluoride have been tested as the acid catalysts for direct esterification/transesterification and consequent gas chromatographic determination of the total fatty acid content in cyanobacteria and algae. Acetyl chloride resulted to be the most efficient and was applied for the analysis of freshwater cy...

The collection of pure cultures of algae and cyanobacteria deposited at the Nature Research Centre is a unique and diverse culture collection in Lithuania. It was initiated on the basis of a few national projects in 2010 as an outcome of ecological and molecular studies on invasive and harmful bloom-forming algae and cyanobacteria. To date, the col...

The nuisance large flagellate Gonyostomum semen (Raphidophyceae) currently occupies brown-water lakes in temperate and boreal regions. This study is focused on two annual cycles of G. semen in shallow temperate lakes with a particular emphasis on the species ecology and its potential impact on the alternation of phytoplankton assemblages. Temperatu...

Increasing human activity has resulted in the transformation of waters and their landscape leading to fragmentation and degradation of natural ecosystems. We hypothesized that adjacent surrounding structures of water reservoir is weighty factor explaining changes in phytoplankton. The aim of the study was to find what level of identification is ade...

Anthropogenic eutrophication conditioned frequent and more pronounced blooms of toxic algae and cyanobacteria in the fresh and saline aquatic ecosystems all world around. However, blooming species could serve as a possible resource instead of a threat by exploiting them to remediate nutrients. The optimised use of algae and cyanobacteria may provid...

The current study summarised the diversity of cyanobacteria found in various habitats of the second largest raised bog of Lithuania. A total of 56 cyanobacteria species that comprise 19% of all phycoflora diversity in Kamanos raised bog were recorded. Species from the Chroococcales (32 species) order and the Chroococcus (7), Aphanothece (7) genera...

http://www.jaunasis-tyrejas.lt/index.php?option=com_content&view=article&id=341:dumbliai-ir-melsvabakters-nuo-aplinkos-valymo-iki-bioprodukt&catid=18:mokslo-naujienos&Itemid=57

Vb-AphaS-CL131 is a novel cyanosiphovirus that infects harmful Aphanizomenon flos-aquae. This cyanophage has an isometric head, 97 nm in diameter and a long, flexible non-contractile tail, 361 nm long. With a genome size of ∼120 kb, it is the second largest cyanosiphovirus isolated to date. The latent period was estimated to be ∼36 h and a single i...

We report here the de novo genome assembly of a cyanobacterium, Aphanizomenon flos-aquae strain 2012/KM1/D3, a harmful bloom-forming species in temperate aquatic ecosystems. The genome is 5.7 Mb with a G+C content of 38.2%, and it is enriched mostly with genes involved in amino acid and carbohydrate metabolism.

DOI:10.1080/09670262.2015.1069493 http://www.tandfonline.com/doi/pdf/10.1080/09670262.2015.1069493

DOI:10.1080/09670262.2015.1069493 http://www.tandfonline.com/doi/pdf/10.1080/09670262.2015.1069493

Lichen community changes were investigated on trees within a colony of great cormorants (Phalacrocorax carbo sinensis) established in a pine forest on the Curonian Spit, western Lithuania. The impact of birds on the forest has altered the number and characteristics of substrata available to lichens. The lowest number of lichen species and occurrenc...

The occurrence and severity of harmful cyanobacterial or blue-green algal blooms (HABs) have increased in recent decades, posing a serious threat of illness to humans. In some countries, water contaminated with cyanotoxins that is used for drinking or haemodialysis has posed a particularly serious risk. However, it is now recognized that recreation...

Lichen community changes were investigated on trees within a colony of great cormorants (Phalacrocorax carbo sinensis) established in a pine forest on the Curonian Spit, western Lithuania. The impact of birds on the forest has altered the number and characteristics of substrata available to lichens. The lowest number of lichen species and occurrenc...

Koreivienė J., Belous O., Kasperovičienė J., 2012: Variations of microcystins in freshwater ecosystems [Mikrocystinai gėlavandenėse ekosistemose]. - Bot. Lith., 19(2): 139-148 Increased frequency, severity of harmful algae blooms and their extent worldwide have become a global challenge due to the production of toxins that are released to the water...

Invasions in aquatic ecosystems can have negative ecological and economic effects. It is important to identify the impacts of non-native species in order to evaluate the outcomes of invasion processes and implement measures of management. A biopollution assessment method (BPL, or biopollution level index) was applied to measure the impact of Gonyos...

Servienė E., Kemežienė I., Kasperovičienė J., čapukoitienė B., Rančelienė V., Koreivienė J., 2012: Optimization of DNA isolation and PCR parameters for RAPD analysis of Gonyostomum semen (Raphidophyceae) [DNR izoliavimas ir PGR parametrų optimizavimas Gonyostomum semen (Raphidophyceae) dumblių RAPD analizei]. - Bot. Lith., 18(1): 40-45. The genomic...

Abstract Koreivienė J., Belous O., 2012: Methods for cyanotoxins detection [Cianotoksinų nustatymo metodai]. – Bot. Lith., 18(1): 58–65. Global occurrence and concern about microcystin contamination, the potential consequences of exposure to cyanobacterial toxins in recreational and drinking waters promoted the development of numerous methods to de...

Three species of raphidophycean algae were found in 33 Lithuanian lakes (of 102 studied) comprising over 50% of phytoplankton biomass in twelve of them. Algae occurred mainly in small, closed, shallow, sheltered lakes surrounded by swampy banks with pH values from 4.28 to 7.81 and conductivity between 13–166 μS cm –1 . Gonyostomum semen was the mos...

The anthropogenic eutrophication of surface waters and the global climate warming promoted some bloom-forming tropical cyanobacteria, including Anabaena, distribution northwards. Anabaena bergii var. limnetica was for the first time recorded in Lithuania from the hypertrophic Lake Gineitiškės in 2008. It developed when the water temperature reached...

Koreivienė J., Kasperovičienė J., 2011: Coccoid green algae flora in plankton of small lakes of the Baltic Uplands [Rytinės Baltijos kalvyno dalies mažųjų ežerų planktono kokoidinių žaliadumblių flora]. – Bot. Lith., 17(1): 13–27. One hundred and thirty four species of coccoid green algae ascribed to 12 families and 49 genera were recorded in 28 sm...

Koreivienė J., Kasperovičienė J., 2011: Significance of coccoid green algae in plankton of small lakes in the eastern part of the Baltic Uplands [Kokoidinių žaliadumblių svarba Rytinės Baltijos kalvyno dalies mažųjų ežerų fitoplanktonui]. – Bot. Lith., 17(2–3): 97–108. Coccoid green algae accounted for about 20 % of the total plankton algal diversi...

Plankton community structure (algae, bacteria, heterotrophic flagellates, ciliates, rotifers, crustaceans) was studied in the highly eutrophic Lake Gineitiškės during June–October 2004. In the warm vegetation period, cyanobacteria (especially Microcystis and Anabaena) dominated in phytoplankton both by the abundance (87–98%) and biomass (55–91%), w...

1 -Phytoplankton structure, primary production, extracellular release of dissolved organic carbon and pelagic community respiration were investigated in different zones of the Curonian Lagoon in July 2002-2004. 2 -Phytoplankton biomass and primary production rates in different zones varied from 10.3 to 30.2 mg l -1 and from 530 to 2300 mg C m -3 d...

Koreivienë J., Kasperovièienë J., 2006: The checklist of Chlorococcales (Chlorophyta) from water bodies of Lithuania (Chlorellaceae, Scenedesmaceae) [Lietuvos vandens telkiniø Chlorococcales eilës þaliadumbliø (Chlorellaceae, Scenedesmaceae) s¹vadas]. – Botanica Lithuanica, 12(1): 39–56. This paper continues publication of the checklist of the Chlo...

During the summer-autumn of 2004, phytoplankton as well as potential toxic algae and their produced microcystins dynamics study was carried out in the shallow hypertrophic Lake Gineitiskes. Totally 136 algae species and varieties were found, fourteen of them are potentially toxic. Water bloom was caused by cyanoprokaryotes, particularly from Anabae...

A checklist of Chlorococcales algae recorded in different water bodies of Lithuania has been compiled. It includes algae from 447 different water bodies: 205 lakes, 11 karst lakes, 5 water reservoirs, 37 ponds, 182 rivers and streams, and 7 springs. Out 283 coccoid green algae species and intraspecific taxa found in the country, more than half (54%...

Coccoid green algae were investigated in the plankton of 22 lakes in the Vilnius region during 1997-1999. Nine species of the family Botryococcaceae were found, four species representing the subfamily Botryococcoideae (Botryococcus braunii Kützing, B. protuberans W. et G. S. West, B. terribilis Komárek et Marvan, B. cf. pila Komárek et Marvan) and...