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 VL - 81 PY - 2024 PG - 12 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 - Nyeste, Krisztián József AU - Zulkipli , Nurfatin Binti AU - Uzochukwu, Ifeanyi Emmanuel AU - Somogyi, Dóra AU - Nagy, László AU - Czeglédi, István AU - Harangi, Sándor AU - Baranyai, Edina AU - Simon, Edina AU - Nagy, Sándor Alex AU - Velcheva, Iliana AU - Yancheva, Vesela AU - Antal, László TI - Assessment of trace and macroelement accumulation in cyprinid juveniles as bioindicators of aquatic pollution: effects of diets and habitat preferences JF - SCIENTIFIC REPORTS J2 - SCI REP VL - 14 PY - 2024 IS - 1 PG - 14 SN - 2045-2322 DO - 10.1038/s41598-024-61986-4 UR - https://m2.mtmt.hu/api/publication/34863272 ID - 34863272 AB - Juveniles of three cyprinids with various diets and habitat preferences were collected from the Szamos River (Hungary) during a period of pollution in November 2013: the herbivorous, benthic nase ( Chondrostoma nasus ), the benthivorous, benthic barbel ( Barbus barbus ), and the omnivorous, pelagic chub ( Squalius cephalus ). Our study aimed to assess the accumulation of these elements across species with varying diets and habitat preferences, as well as their potential role in biomonitoring efforts. The Ca, K, Mg, Na, Cd, Cr, Cu, Fe, Mn, Pb, Sr, and Zn concentration was analyzed in muscle, gills, and liver using MP-AES. The muscle and gill concentrations of Cr, Cu, Fe, and Zn increased with trophic level. At the same time, several differences were found among the trace element patterns related to habitat preferences. The trace elements, including Cd, Pb, and Zn, which exceeded threshold concentrations in the water, exhibited higher accumulations mainly in the muscle and gills of the pelagic chub. Furthermore, the elevated concentrations of trace elements in sediments (Cr, Cu, Mn) demonstrated higher accumulation in the benthic nase and barbel. Our findings show habitat preference as a key factor in juvenile bioindicator capability, advocating for the simultaneous use of pelagic and benthic juveniles to assess water and sediment pollution status. LA - English DB - MTMT ER - TY - CHAP 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 ED - Abriha-Molnár, Vanda Éva TI - Vegetációs fenofázisok osztályozhatósága multispektrális UAS felmérés alapján T2 - Az elmélet és a gyakorlat találkozása a térinformatikában XV. PB - Debreceni Egyetemi Kiadó CY - Debrecen SN - 9789634906193 PY - 2024 SP - 269 EP - 273 PG - 5 UR - https://m2.mtmt.hu/api/publication/34893695 ID - 34893695 AB - The significance of aquatic ecosystems is increasingly recognized, considering their conservation, recreational, and economic value. However, their sustainable management is complex and challenging, requiring a thorough understanding. Monitoring the condition and changes of habitats is crucial, which can be facilitated by analyzing the organisms and vegetation present in the area. To further refine the classification process, it may be important to disaggregate classes into phenophases, which can be supported by examining the Jeffries-Matusita distances. In the case study presented of the Rakamazi Nagy-Morotva, a multispectral UAS-based survey was conducted to assess the separability of classes. The results indicate that higher accuracy cannot be achieved with classes disaggregated into phenophases. However, based on the separability analysis, it may be worth considering the separation of only a few classes where high separability values are achieved, thus allowing for the production of more detailed land cover maps while maintaining thematic accuracy LA - Hungarian DB - MTMT ER - TY - JOUR AU - Boda, Pál AU - Szeles, Júlia AU - Lukács, Áron AU - Bácsiné Béres, Viktória AU - Bozóki, Tamás AU - Fekete, Judit AU - Ficsór, Márk AU - Nagy, Sándor Alex AU - Várbíró, Gábor TI - Hidden results of functional diversity in macroinvertebrates: response of trait groups to flow intermittency in lowland streams JF - INLAND WATERS J2 - INLAND WATERS VL - 14 PY - 2024 IS - 1-2 SP - 127 EP - 142 PG - 16 SN - 2044-2041 DO - 10.1080/20442041.2024.2386208 UR - https://m2.mtmt.hu/api/publication/35177312 ID - 35177312 LA - English DB - MTMT ER - TY - JOUR AU - Nyeste, Krisztián József AU - Uzochukwu, Ifeanyi Emmanuel AU - Somogyi, Dóra AU - Nagy, László AU - Czeglédi, István AU - Harangi, Sándor AU - Baranyai, Edina AU - Simon, Edina AU - Nagy, Sándor Alex AU - Velcheva, Iliana AU - Yancheva, Vesela AU - Antal, László TI - Eltérő korú és táplálkozású domolykók (Squalius cephalus) indikátorszerepe a fémszennyezések kimutatásában JF - HALÁSZAT-TUDOMÁNY J2 - HALÁSZAT-TUDOMÁNY VL - 10 PY - 2024 IS - 1 SP - 31 EP - 46 PG - 16 SN - 3003-9797 UR - https://m2.mtmt.hu/api/publication/35463606 ID - 35463606 LA - Hungarian DB - MTMT ER - TY - JOUR AU - Nyeste, Krisztián József AU - Zulkipli , Nurfatin Binti AU - Uzochukwu, Ifeanyi Emmanuel AU - Somogyi, Dóra AU - Nagy, László AU - Czeglédi, István AU - Harangi, Sándor AU - Baranyai, Edina AU - Simon, Edina AU - Nagy, Sándor Alex AU - Velcheva, Iliana AU - Yancheva, Vesela AU - Antal, László TI - Eltérő táplálkozású és habitatpreferencájú halivadékok indikátorszerepe a fémszennyezés kimutatásában JF - HALÁSZATFEJLESZTÉS J2 - HALÁSZATFEJLESZTÉS VL - 40 PY - 2023 SP - 30 EP - 31 PG - 2 SN - 1219-4816 UR - https://m2.mtmt.hu/api/publication/34011622 ID - 34011622 LA - Hungarian 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 - 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 - Mozsár, Attila AU - Specziár, András AU - Pirger, Zsolt AU - Czeglédi, István AU - Kati, Sára AU - Nagy, Sándor Alex AU - Nyeste, Krisztián József AU - Somogyi, Dóra AU - Antal, László TI - Sexual trait may simultaneously indicate sperm production and nutritional fitness in uniparental nest guarding fishes: a case study on Amur sleeper JF - JOURNAL OF ZOOLOGY J2 - J ZOOL VL - 314 PY - 2021 IS - 3 SP - 227 EP - 233 PG - 7 SN - 0952-8369 DO - 10.1111/jzo.12874 UR - https://m2.mtmt.hu/api/publication/31830710 ID - 31830710 LA - English DB - MTMT ER - TY - JOUR AU - Berzi-Nagy, László AU - Mozsár, Attila AU - Tóth, Flórián AU - Gál, Dénes AU - Nagy, Zoltán AU - Nagy, Sándor Alex AU - Kerepeczki, Éva AU - Antal, László AU - Jakabné Sándor, Zsuzsanna TI - Effects of Different Fish Diets on the Water Quality in Semi-Intensive Common Carp (Cyprinus carpio) Farming JF - WATER J2 - WATER-SUI VL - 13 PY - 2021 IS - 9 PG - 10 SN - 2073-4441 DO - 10.3390/w13091215 UR - https://m2.mtmt.hu/api/publication/31991125 ID - 31991125 LA - English DB - MTMT ER -