TY - JOUR AU - Szabó, Loránd AU - Bertalan, László AU - Szabó, Gergely AU - Grigorszky, István AU - Somlyai, Imre AU - Dévai, György AU - Nagy, Sándor Alex AU - Holb, Imre AU - Szabó, Szilárd TI - Aquatic vegetation mapping with UAS-cameras considering phenotypes JF - ECOLOGICAL INFORMATICS J2 - ECOL INFORM PY - 2024 SN - 1574-9541 DO - 10.1016/j.ecoinf.2024.102624 UR - https://m2.mtmt.hu/api/publication/34839516 ID - 34839516 AB - Aquatic vegetation species at the genus level in an oxbow lake were identified in Hungary based on a multispectral Uncrewed Aerial System (UAS ) survey within an elongated oxbow lake area of the Tisza River under continental climate. Seven and 13 classes were discriminated using three different classification methods (Support Vector Machine [SVM], Random Forest [RF] , and Multivariate Adaptive Regression Splines [MARS]) using different input data in ten combinations: original spectral bands , spectral indices, Digital Surface Model (DSM) , and Haralick texture indices. We achieved a high (97.1%) overall accuracies (OAs) by applying the SVM classifier, but the RF performed only <1% worse, as it was represented in the first places of the classification rank before the MARS. The highest classification accuracies (>84% OA) were obtained using the most important variables derived by the Recursive Feature Elimination (RFE) method . The best classification required DSM as an input variable. The poorest classification performance belonged to the model that used only texture indices or spectral indices. On the class level, Stratoites aloides exhibit the lowest degree of separability compared to the other classes. Accordingly, we recommend using supplementary input data for the classifications beside s the original spectral bands, for example , DSM, spectral , and texture indices, as these variables significantly improve the classification accuracies in the proper combinations of the input variables . 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 - Pethő, Zsófia AU - Grigorszky, István AU - Nagy, Sándor Alex AU - Gomez, Izabella Ilona AU - Bender, Tamás AU - Domján, Andrea AU - Szekanecz, Zoltán TI - Magas sótartalmú termálvizes balneoterápia psoriasisban az arthritis psoriaticában JF - BALNEOLÓGIA GYÓGYFÜRDŐÜGY GYÓGYIDEGENFORGALOM J2 - BALN GYÓGYF GYÓGYIDEGENF VL - 41 PY - 2023 IS - 1 SP - 13 EP - 25 PG - 13 SN - 0865-9222 UR - https://m2.mtmt.hu/api/publication/34408771 ID - 34408771 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 - JOUR AU - Szanyi, Kálmán AU - Grigorszky, István AU - Szabó, László József AU - Dévai, György TI - Past and present: changes in the Odonata fauna of small lowland watercourses JF - BIODIVERSITY DATA JOURNAL J2 - BIODIVERS DATA J VL - 11 PY - 2023 SN - 1314-2836 DO - 10.3897/BDJ.11.e107919 UR - https://m2.mtmt.hu/api/publication/34204551 ID - 34204551 AB - Small lowland watercourses, strongly exposed to anthropogenic activities and climate change, have received negligible odonatological attention. This study provides a revised checklist of three typical lowland small watercourses (Kállai-főfolyás, Konyári-Kálló and Ölyvös) within the Pannonian Lowland and presents the changes in their diversity over the past decades. Results revealed a significant biodiversity loss, with a 31.6% decline in Odonata fauna over the last 53 years. The upper and middle sections degraded the most, where the habitats have dried out or become intermittent. However, a diverse Odonata assemblage (1,277 individuals of 27 species) was observed at the 14 sampling sites of the three watercourses, containing protected and sensitive species ( Somatochlora flavomaculata , Orthetrum brunneum , Aeshna isoceles , Libellula fulva ). However, the low abundance of larval and exuvial forms (59 individuals of 13 species) suggests that the majority of the observed adults were developed in other watercourses. While recolonisation from nearby habitats is still possible, a parallel degradation of adjecent waterbodies could lead to an irreversible biodiversity loss. LA - English DB - MTMT ER - TY - JOUR AU - Pethő, Zsófia AU - Grigorszky, István AU - Nagy, Sándor Alex AU - Gomez, Izabella Ilona AU - Bender, Tamás AU - Domján, Andrea AU - Szekanecz, Zoltán TI - Magas sótartalmú termálvizes balneoterápia psoriasisban és arthritis psoriaticában JF - MAGYAR REUMATOLÓGIA J2 - MAGYAR REUMATOL VL - 64 PY - 2023 SP - 82 EP - 90 PG - 9 SN - 0139-4495 UR - https://m2.mtmt.hu/api/publication/34047251 ID - 34047251 LA - Hungarian DB - MTMT ER - TY - JOUR AU - Hajredini, Arber AU - Demelezi, Florent AU - Somlyai, Imre AU - Grigorszky, István AU - Berta, Csaba TI - Possible mediation of Cladocera species by a researcher's chest wader JF - HELIYON J2 - HELIYON VL - 9 PY - 2023 IS - 6 PG - 10 SN - 2405-8440 DO - 10.1016/j.heliyon.2023.e16725 UR - https://m2.mtmt.hu/api/publication/33936325 ID - 33936325 AB - Mediation of aquatic species has become an increasing problem for the last few decades. With the increasing commercial import, species’ direct or indirect spread can gain more space. There are several ways for them to land in their new home and spread through the country. Most of the aquatic species are spread by waterways, boats, vehicles, or even with the help of humans. Cladocerans have a good dispersal ability, thanks to their small size, additionally they possess good adaptation, and mechanisms to develop resting eggs. Benthic or littoral species can be mediated much more easily due to their living space, and with the help of human activities (e.g., scientists, anglers and people working in water bodies) they have a higher chance to colonize new habitats. Our goal was to explore if Cladocera species might be mediated by a scientist chest wader, while sampling in similar-sized, close-to-each other lakes, with different utilization. Most of the species were found in abandoned fishing lakes, followed by oxbow lakes (protected), and ultimately in intensively fished lakes. NMDS showed that samples from lakes with the same utilization are similar to each other. Differently utilized lakes can have various Cladocera species, even though they are closely related to each other. Based on the results, scientists can mediate species on their chest wader from lake to lake and may deteriorate the results. We recommend a necessary chest wader cleaning after every sampling process, especially when samples are taken from differently utilized lakes. LA - English DB - MTMT ER - TY - JOUR AU - Yaqoob, Majd AU - Somlyai, Imre AU - Berta, Csaba AU - Bácsi, István AU - Al-Tayawi, Aws N. AU - Al-Ahmady, Kossay K. AU - Mohammed, Ramadhan Hamza AU - Alalami, Omar AU - Grigorszky, István TI - The Impacts of Land Use and Seasonal Effects on Phytoplankton Taxa and Physical-Chemical Variables in the Tigris River within the City of Mosul JF - WATER J2 - WATER-SUI VL - 15 PY - 2023 IS - 6 SP - 1062 SN - 2073-4441 DO - 10.3390/w15061062 UR - https://m2.mtmt.hu/api/publication/33698834 ID - 33698834 AB - We investigated the effect of land use based on the dominant phytoplankton and physical-chemical variables in the different areas of the Tigris River, within the city of Mosul. Agricultural and urban activities have a significant impact on the water quality of the river. Regardless of physical and chemical variables, phytoplankton act as a bio-indicator of water quality due to their fast and sensitive response to changes in the environment. Our research was conducted in the Tigris River within the city of Mosul by examining the phytoplankton species and the physical-chemical variables at 16 sites during each vegetation period. Point and non-point source pollutants have affected the Tigris River within the city of Mosul, getting into the river from upstream through agricultural activities and by urban activities in the middle section of the city, respectively from both banks. Based on our results, we observed the highest phytoplankton abundance during the October sampling periods, while the lowest occurred during the July sampling period, which was associated with maximum water temperature and absence of rain. According to our study, land use (e.g., agricultural, and urban activities) greatly affected the dominant phytoplankton species and physical-chemical variables of the Tigris River. Oscillatoria sp. dominated all seasons in the agricultural region, while at the same time, we observed an increase in the number of phytoplankton species caused by the nutrient availability upstream on the river. The effects of climate have very significant and characteristic effects in this area, which basically determine the community of organisms and the water quality; the effects resulting from anthropogenic activity significantly modify this. Based on our investigation, in the part of the Tigris River connected to Mosul, we found a clear connection between the pollution caused and the effects of different land uses, through the examination of the algal community and physical-chemical variables in different periods of the year. LA - English DB - MTMT ER - TY - JOUR AU - Tumurtogoo, Uyanga AU - Figler, Aida AU - Korponai, János AU - Sajtos, Zsófi AU - Grigorszky, István AU - Berta, Csaba AU - Gyulai, István TI - Density and Diversity Differences of Contemporary and Subfossil Cladocera Assemblages: A Case Study in an Oxbow Lake JF - WATER J2 - WATER-SUI VL - 14 PY - 2022 IS - 14 PG - 14 SN - 2073-4441 DO - 10.3390/w14142149 UR - https://m2.mtmt.hu/api/publication/32922841 ID - 32922841 N1 - Department of Hydrobiology, Faculty of Science and Technology, University of Debrecen, Egyetem tér 1, Debrecen, H-4032, Hungary Pál-Juhász Nagy Doctoral School of Biology and Environmental Sciences, University of Debrecen, Egyetem tér 1, Debrecen, H-4032, Hungary Department of Water Supply and Sewerage, Faculty of Water Sciences, University of Public Services, Bajcsy-Zs. utca 12-14, Baja, H-6500, Hungary Department of Environmental Sciences, Sapientia Hungarian University of Transylvania, Calea-Turzii nr. 4, Cluj-Napoca, RO-400193, Romania Department of Inorganic and Analytical Chemistry, Faculty of Science and Technology, University of Debrecen, Egyetem tér 1, Debrecen, H-4032, Hungary Export Date: 26 January 2023 Correspondence Address: Berta, C.; Department of Hydrobiology, Egyetem tér 1, Hungary; email: berta.csaba@science.unideb.hu LA - English DB - MTMT ER -