TY - JOUR AU - Görgényi, Judit AU - Török-Krasznai, Enikő AU - Lukács, Áron AU - Kókai, Zsuzsanna AU - Bácsiné Béres, Viktória AU - Várbíró, Gábor AU - Ács, Éva AU - Kiss, Keve Tihamér AU - Tóthmérész, Béla AU - Borics, Gábor TI - Functional properties of planktic microalgae determine their habitat selection JF - HYDROBIOLOGIA J2 - HYDROBIOLOGIA VL - 851 PY - 2024 SP - 801 EP - 821 PG - 21 SN - 0018-8158 DO - 10.1007/s10750-023-05421-1 UR - https://m2.mtmt.hu/api/publication/34500851 ID - 34500851 N1 - Department of Tisza Research, HUN-REN Centre for Ecological Research, Institute of Aquatic Ecology, 18/C Bem Square, Debrecen, 4026, Hungary Department of Ecology, University of Debrecen, Egyetem Square 1, Debrecen, 4032, Hungary ELKH-DE Functional and Restoration Ecology Research Group, Egyetem Sqr. 1, Debrecen, 4032, Hungary Department of Water Supply and Sewerage, Faculty of Water Sciences, University of Public Service, 12-14 Bajcsy-Zsilinszky Street, Baja, 6500, Hungary Export Date: 21 February 2024; Cited By: 0; Correspondence Address: J. Görgényi; Department of Tisza Research, HUN-REN Centre for Ecological Research, Institute of Aquatic Ecology, Debrecen, 18/C Bem Square, 4026, Hungary; email: gorgenyi.judit@ecolres.hu; CODEN: HYDRB AB - In this study, we aim to investigate how the functional properties of microalgae help to delineate the major groups of aquatic habitats. Using functional trait-based and Reynolds’ functional group-based approaches similarities of the microalgal flora of all aquatic habitats occurring in Hungary were compared. The habitats covered the whole size spectrum of standing waters (10-2–108m2) and water currents (watershed: 102–1011m2), , limnological and chemical properties. Both functional trait-based and functional group-based habitat classifications overrode the hydromorphology-based typology, however, functional group-based clusters showed closer resemblance to limnological-hydromorphological types than clusters created by trait-based approaches both for qualitative and quantitative data. Most of the aquatic habitats that have similar limnological characteristics showed resemblance in the functional properties of their microflora. Rivers and river-related habitats were the most diverse functionally. These were followed by standing waters with extended macrophyte coverage. The small, unique habitats displayed the lowest functional richness. The occurrence of several functional groups in some extreme habitats implies two alternative explanations: first, the habitat template of the groups is wider than defined in the original description; second, detailed information on the autecology of species assigned to a functional group necessitates the creation of new groups specific for the unique habitats. LA - English DB - MTMT ER - TY - JOUR AU - Stanković, Igor AU - Hanžek, Nikola AU - Mischke, Ute AU - Krisa, Harald AU - Velická, Zuzana AU - Török-Krasznai, Enikő AU - Kiss, Keve Tihamér AU - Belkinova, Detelina AU - Bălan, Marinela AU - Amăriucăi, Vlad AU - Diaconu, Ionela AU - Borics, Gábor TI - Phytoplankton biomass and functional composition in the Danube River and selected tributaries: a case study Joint Danube Survey 4 JF - HYDROBIOLOGIA J2 - HYDROBIOLOGIA VL - 851 PY - 2024 SP - 973 EP - 998 PG - 26 SN - 0018-8158 DO - 10.1007/s10750-023-05359-4 UR - https://m2.mtmt.hu/api/publication/34163944 ID - 34163944 AB - In 2019, phytoplankton and environmental parameters were analysed monthly during the growing season from April to September at 26 sampling sites in the Danube and 10 additional sampling sites in the main tributaries as part of the Joint Danube Survey 4, organised by the ICPDR. Our results showed that both phytoplankton biomass and composition follow the River Continuum Concept on free-flowing sections, but also responds to hydromorphological changes where the largest dam Iron Gate represents the largest interruption of the river and the phytoplankton continuum. Besides longitudinal interruption, water residence time was the most important factor for phytoplankton composition, while nutrients were less relevant. The low phytoplankton biomass and its composition in the Danube support the oligotrophication trend, but this one-year study could not confirm it with certainty. Phytoplankton is the most important autotrophic component in the Upper and Middle Danube, where environmental conditions do not support the optimal growth of other river flora. The predominant FGs coda were A, C and D as a typical potamoplankton component, while the codon TB occurs throughout the Danube but is more prominent in the Upper reach and other river sections with higher discharge events. LA - English DB - MTMT ER - TY - JOUR AU - Ács, Éva AU - Bíró, Tibor AU - Béres Deák, László AU - Duleba, Mónika AU - Grigorszky, István AU - Kiss, Keve Tihamér AU - Németh, Zoltán AU - Papp, András AU - Vadkerti, Edit TI - Alkalmas-e a kavitációs vízkezelés az algavirágzások csúcsainak letörésére? JF - HADMÉRNÖK J2 - HADMÉRNÖK VL - 18 PY - 2023 IS - 3 SP - 19 EP - 32 PG - 14 SN - 1788-1919 DO - 10.32567/hm.2023.3.2 UR - https://m2.mtmt.hu/api/publication/34506155 ID - 34506155 N1 - A kutatásokat a K-KFI-16-1-2017 0159558 számú projekt támogatta, a Hernád hullámterében elvégzett horgásztavi vizsgálatokat pedig a Széchenyi Terv Plusz RRF-2.3.1-21-2022-00008 program keretében végeztük. AB - Egy kísérleti kavitációs berendezés tervezésével, létrehozásával és kisüzemi alkalmazásával a szennyezett vizek egyik lehetséges tisztítási módját vizsgáltuk. A kísérleti berendezés mobil kivitelű, és alkalmas különböző szennyezettségű vizek tisztítására. Bemutatjuk a kavitáció hatását különböző mikroszkopikus méretű élőlényekre. Először egy hígított zöldalgatenyészetet vizsgáltunk, megállapítottuk, hogy 16–32 perces kavitáció több mint 10–20%-kalcsökkenti a klorofillkoncentrációt és az ép sejtek arányát. Biológiailag bontható szennyvízzel kevert algás halastóvízben, kavitáció hatására a cianobaktériumok, ostoros algák mennyisége 40–80%-kalcsökkent, a zöldalgáknál minimális volt a csökkenés. Ezeknél a méréseknél síkszelepes, nagynyomású kavitációgenerátort alkalmaztunk. Bizonyítottuk,hogy a hajók ballasztvize és a szennyvizek mikrobiótája mennyiségének csökkentésére a kavitációs vízkezelés ígéretes megoldásnak tekinthető, de figyelemmel kell lenni arra, hogy csak elpusztul a mikrobióta, de nem tűnik el a vízből. LA - Hungarian DB - MTMT ER - TY - JOUR AU - Ács, Éva AU - Bíró, Tibor AU - Boros, Emil AU - Dobosy, Péter AU - Duleba, Mónika AU - Földi, Angéla AU - Kiss, Keve Tihamér AU - Levkov, Zlatko AU - Orgoványi, Péter AU - Pálné Szén, Orsolya AU - Trábert, Zsuzsa AU - Vadkerti, Edit AU - Grigorszky, István TI - Halamphora taxa in Hungarian soda pans and shallow soda lakes detected via metabarcoding and microscopic analyses JF - METABARCODING AND METAGENOMICS J2 - METABARCODING AND METAGENOMICS VL - 7 PY - 2023 SP - 413 EP - 438 PG - 26 SN - 2534-9708 DO - 10.3897/mbmg.7.111679 UR - https://m2.mtmt.hu/api/publication/34449902 ID - 34449902 AB - The research presented investigates whether DNA-based metabarcoding can replace the morphology-based identification of diatom taxa in the ecological status assessments of aquatic habitats. When comparing data obtained with microscopy and metabarcoding, significant deviations have been noticed. One of the main reasons includes the incompleteness of the reference database used for taxonomic annotation of sequences. The database library should be complemented with species inhabiting unique habitats and having specific environmental requirements representing environmental endpoints for genetic diversification. Soda pans and soda lakes are examples of an extreme habitat with the loss of sodic character as the main threat; thus, accurate identification of species and exact information on their salinity tolerance is essential for adequate ecological status assessment. In the present study, by using microscopy and metabarcoding, we investigated taxa of the genus Halamphora that are common in soda pans and soda lakes. We detected six species of which Halamphora dominici and H. veneta occurred frequently and often in high abundance (it was often dominant having relative abundance higher than 5%). Analyses of DNA data confirmed the separation of the two species; as a result, the reference database library has been supplemented with sequences of H. dominici . Furthermore, we have confirmed that this species, which is a significant indicator of sodic character, shows a positive correlation with salinity. LA - English DB - MTMT ER - TY - JOUR AU - Ács, Éva AU - Kériné Borsodi, Andrea AU - Kiss, Keve Tihamér AU - Teszárné, Nagy Mariann TI - Reskóné Dr. Nagy Mária – Ács Éva, Borsodi Andrea, Kiss Keve Tihamér és Teszárné Nagy Mariann megemlékezése JF - HIDROLÓGIAI KÖZLÖNY J2 - HIDROL KOZL VL - 103 PY - 2023 IS - 4 SP - 80 EP - 80 PG - 1 SN - 0018-1323 UR - https://m2.mtmt.hu/api/publication/34431758 ID - 34431758 LA - Hungarian DB - MTMT ER - TY - JOUR AU - Rusanov, Alexander G. AU - Gololobova, Maria A. AU - Kolobov, Mikhail Y. AU - Duleba, Mónika AU - Georgiev, Anton A. AU - Grigorszky, István AU - Kiss, Keve Tihamér AU - Ács, Éva AU - Somlyai, Imre TI - Quantitative Morphometric Analysis of Morphologically Similar Species of Fragilaria (Fragilariaceae, Bacillariophyta) Allows Detection of Non-Indigenous Taxa: A Case Study from Lake Ladoga (North of European Russia) JF - WATER J2 - WATER-SUI VL - 15 PY - 2023 IS - 22 PG - 23 SN - 2073-4441 DO - 10.3390/w15223994 UR - https://m2.mtmt.hu/api/publication/34363198 ID - 34363198 AB - In Lake Ladoga (northwestern Russia), we found a diatom, putatively Fragilaria sublanceolata-baikali, an endemic species from Lake Baikal (southeastern Siberia, Russia). To determine whether this population matches a previously recognized species from Lake Baikal and assess how it differs from other similar Fragilaria taxa, we studied the valve morphology of three morphologically similar Fragilaria populations (the putative F. sublanceolata-baikali, F. pectinalis and F. perminuta) sampled in Lake Ladoga, along with a population of F. sublanceolata-baikali sampled in Lake Baikal. We used light and scanning electron microscopy with a combination of traditional and geometric morphometric methods. To analyze covariation between the valve shape and size (i.e., allometry), we examined differences in the ontogenetic–allometric trajectories at both the interspecific and intraspecific levels. In addition, the effect of size correction of the valve shape on species differentiation was tested. Traditional morphometrics revealed that F. sublanceolata-baikali is distinguished from F. pectinalis and F. perminuta by valve length, while F. pectinalis and F. perminuta are distinguished by striae density. All three species of Fragilaria showed separate and parallel allometric trajectories. In contrast, the two populations of F. sublanceolata-baikali were on a common allometric trajectory, indicating the conspecificity between these populations. Prior to allometric correction, geometric morphometrics was not able fully discriminate between the three Fragilaria species. After allometric correction, the three Fragilaria species were clearly separated in a size-corrected morphospace, whereas the two populations of F. sublanceolata-baikali formed a tightly overlapping group. Thus, we conclude that geometric morphometrics can reliably distinguish between these morphologically similar species of Fragilaria, but only after accounting for allometric shape variation. Our study confirmed morphological similarity between the two geographically distant populations of F. sublanceolata-baikali, which indicates that this taxon can be considered as invasive in Lake Ladoga. LA - English DB - MTMT ER - TY - BOOK ED - Ács, Éva AU - Ács, Éva AU - Bíró, Tibor AU - Buczkó, Krisztina AU - Duleba, Mónika AU - Földi, Angéla AU - Kiss, Keve Tihamér AU - Orgoványi, Péter AU - Trábert, Zsuzsa TI - Képes útmutató Magyarország leggyakoribb bevonatlakó kovaalgáihoz (Bacillariophyceae) PB - Ludovika Egyetemi Kiadó CY - Budapest PY - 2023 SP - 450 SN - 9786156598226 UR - https://m2.mtmt.hu/api/publication/34224787 ID - 34224787 AB - A könyv, amelyet az Olvasó a kezében tart, Magyarország leggyakoribb bevonatlakó kovaalgáit bemutató határozási segédlet, amelynek elkészítését az a 2019-ben és 2020-ban zajló országos felmérés tette lehetővé. Ennek során többek között olyan felszíni vizekből gyűjtöttünk mintákat, amelyeket korábban egyáltalán nem vizsgáltak. Az összeállításban csak azok a taxonok kaptak helyet, amelyek ezen felmérés során legalább egy mintában dominánsak voltak (relatív egyedszámuk elérte az 5%-ot). A könyv megírásával a felszíni vizeknek az Európai Unió Víz Keretirányelve (EU VKI) által előírt ökológiai állapotértékelését kívántuk segíteni azáltal, hogy a bevonatban előforduló legfontosabb taxonokhoz határozási segédletet nyújtunk. Mivel az EU VKI a felszíni vizek monitorozása során a fénymikroszkóp használatát írja elő, így jelen munkában mi is alapvetően a fénymikroszkópos bélyegekre fókuszáltunk, de ahol a határozást az ultrastrukturális bélyegek megismerése is segítheti, ott pásztázó elektronmikroszkópos képeket is közöltünk. LA - Hungarian DB - MTMT ER - TY - JOUR AU - Görgényi, Judit AU - Török-Krasznai, Enikő AU - Ács, Éva AU - Kiss, Keve Tihamér AU - Botta-Dukát, Zoltán AU - Végvári, Zsolt AU - Lukács, Áron AU - Várbíró, Gábor AU - Bácsiné Béres, Viktória AU - Kókai, Zsuzsanna AU - Tóthmérész, Béla AU - Borics, Gábor TI - Rarity of microalgae in macro, meso, and microhabitats JF - INLAND WATERS J2 - INLAND WATERS VL - 13 PY - 2023 IS - 2 SP - 231 EP - 246 PG - 16 SN - 2044-2041 DO - 10.1080/20442041.2022.2152247 UR - https://m2.mtmt.hu/api/publication/33282833 ID - 33282833 N1 - Department of Tisza Research, Centre for Ecological Research, Institute of Aquatic Ecology, Debrecen, Hungary Department of Danube’s Diversity, Centre for Ecological Research, Institute of Aquatic Ecology, Budapest, Hungary Faculty of Water Sciences, Department of Water Supply and Sewerage, University of Public Service, Baja, Hungary Centre for Ecological Research, Institute of Ecology and Botany, Vácrátót, Hungary Senckenberg Deutsches Entomologisches Insitut, Müncheber, Germany MTA-DE Biodiversity and Ecosystem Services Research Group, Debrecen, Hungary Department of Ecology, University of Debrecen, Debrecen, Hungary Department of Biology, University of Nyíregyháza, Nyíregyháza, Hungary Cited By :1 Export Date: 27 October 2023 Correspondence Address: Görgényi, J.; Department of Tisza Research, 18/c Bem square, Hungary; email: varbirog@gmail.com AB - Climate change and human-induced habitat degradations result in loss of species diversity in natural ecosystems. While the extinction of macroscopic organisms has been well documented in both the scientific literature and the public media, we have only limited knowledge on the loss of microscopic elements of the ecosystems. Since rarity coincides with the increased risk of extinction, we investigated the commonness and rarity of microalgae in the Pannonian ecoregion. We reviewed the published literature of microalgal research in Hungary over the last 140 years and created a species-by-site matrix containing 2489 algae species and 1145 localities. Analysing this dataset, we found that although the core-satellite hypothesis suggests a bimodal site occupancy distribution, microalgae displayed a unimodal pattern with high number of rarely occurring species. We also demonstrated that the well-known negative relationship between the body size of organisms and the number of occupied habitats also holds for microalgae. Rarity values of taxa have a phylogenetic signal indicating that in terms of rarity, closely related species (desmids, dinoflagellates, euglenophytes) show considerable similarities. The various habitat types showed differences in the number of rare taxa. Small and medium-sized habitats (bog lakes, streams, oxbows) hosted the majority of rare species. These results highlight the conservation importance of small habitats in preserving microbial diversity. LA - English DB - MTMT ER - TY - JOUR AU - Bíró, Tibor AU - Duleba, Mónika AU - Földi, Angéla AU - Kiss, Keve Tihamér AU - Orgoványi, Péter AU - Trábert, Zsuzsa AU - Vadkerti, Edit AU - Wetzel, Carlos E. AU - Ács, Éva TI - Metabarcoding as an effective complement of microscopic studies in revealing the composition of the diatom community – a case study of an oxbow lake of Tisza River (Hungary) with the description of a new Mayamaea species JF - METABARCODING AND METAGENOMICS J2 - METABARCODING AND METAGENOMICS VL - 6 PY - 2022 SP - 319 EP - 336 PG - 18 SN - 2534-9708 DO - 10.3897/mbmg.6.87497 UR - https://m2.mtmt.hu/api/publication/33180178 ID - 33180178 AB - Diatoms are valuable bioindicators and their traditional classification and identification are mainly based on the morphological characteristics of their frustules. However, in recent years, DNA-based methods have been proposed and are rapidly growing in the scientific literature as a complementary tool to assess the ecological status of freshwaters. Diatom-based ecological status assessment uses indices calculated from sensitivity and tolerance values as well as relative abundance of species. Correct assessment requires an accurate identification of species. In the present study, diatom assemblages of an oxbow lake were investigated using light and scanning electron microscopy as well as metabarcoding using rbc L marker, and the identification results were compared, intending to match barcode sequences of species that are currently missing in the diatom reference database. The investigated oxbow is an important wetland for bird conservation, although it is impacted by land use. Taxon lists based on morphology and metabarcoding considerably differed when bioinformatics analysis involved DADA2 pipeline with Diat.barcode database. Previously unknown sequence variants of four pennate species were found with additional BLAST search. Using phylogeny and p-distance calculations sequences could be matched to three small-celled naviculoid species that were found under a microscope. One of them was found to be a new species of the genus Mayamaea and was described as a new species, Mayamaea ectorii . Additionally, spatial distribution maps for several small-celled naviculoid species are provided for the Hungarian territory. LA - English DB - MTMT ER - TY - JOUR AU - Alexander G., Rusanov AU - Bíró, Tibor AU - Kiss, Keve Tihamér AU - Buczkó, Krisztina AU - Grigorszky, István AU - Hidas, András AU - Duleba, Mónika AU - Trábert, Zsuzsa AU - Földi, Angéla AU - Ács, Éva TI - Relative importance of climate and spatial processes in shaping species composition, functional structure and beta diversity of phytoplankton in a large river JF - SCIENCE OF THE TOTAL ENVIRONMENT J2 - SCI TOTAL ENVIRON VL - 807 PY - 2022 IS - 2 PG - 15 SN - 0048-9697 DO - 10.1016/j.scitotenv.2021.150891 UR - https://m2.mtmt.hu/api/publication/32382913 ID - 32382913 N1 - A publikáció a Nemzeti Közszolgálati Egyetem 2020. évi Tématerületi Kiválóság Program keretében, a Fenntartható biztonság és társadalmi környezet elnevezésű projekt támogatásával valósult meg, az Innovációs és Technológiai Minisztérium Nemzeti Kutatási, Fejlesztési és Innovációs Alapból nyújtott támogatásával, a Nemzeti Kutatási, Fejlesztési és Innovációs Hivatal által kibocsátott támogatói okirat alapján. AB - Although metacommunity dynamics of lentic phytoplankton are relatively well-documented, studies on the role of environmental and spatial processes in shaping phytoplankton communities of large rivers are still scarce. Here, we examined six phytoplankton data sets, which were collected in 1978-2017 from large river-scale segments (mean spatial extent 1117 km) in the Danube River. Our aim was to elucidate role of climatic, spatial and temporal predictors in variation of phytoplankton beta diversity using variance partitioning for compositions of species and functional groups sensu Reynolds. We hypothesised that phytoplankton beta diversity (measured as average distance to group centroid) would be positively related to both climatic heterogeneity and spatial extent used as a proxy for dispersal limitation. Additionally, we tested alternative dispersal models to evaluate different spatial processes structuring phytoplankton community. Our results revealed that spatial variables were more important than climatic factors in controlling both species and functional group composition. Climatic heterogeneity showed significant positive relationship with beta diversity. In contrast, there was no significant relationship between beta diversity and spatial extent, suggesting that spatial effect on beta-diversity was attenuated by anthropogenic disturbance. The better performance of non-directional model compared to model of water directionality suggested that spatial dynamics of phytoplankton metacommunity was in large part regulated by differences in the regional species pools. Spatial and temporal variables outperformed environmental (including climatic) factors in explaining phytoplankton metacommunity structure, indicating that phytoplankton exhibited strong biogeographical patterns. Thus, dispersal limitation interfered with species-sorting processes in determining phytoplankton community structure. In conclusion, our findings revealed that the development of a more reliable bioassessment program of the Danube River should be based on separation into basin regions. LA - English DB - MTMT ER -