@article{MTMT:34753315,
	title = {Two chironomid-inferred mean July air temperature reconstructions in the South Carpathian Mountains over the last 2000 years},
	url = {https://m2.mtmt.hu/api/publication/34753315},
	author = {Szabó, Zoltán and Buczkó, Krisztina and Korponai, János and Luoto, T and Begy, RCs and Haliuc, A and Veres, D and Hamerlik, L and Csorba, R and Zsigmond, AR and Darabos, Gabriella and Méhes, Nikoletta and Kövér, Csilla and Magyari, Enikő Katalin},
	doi = {10.1177/09596836241236353},
	journal-iso = {HOLOCENE},
	journal = {HOLOCENE},
	volume = {In press},
	unique-id = {34753315},
	issn = {0959-6836},
	abstract = {We present chironomid-based reconstructions of mean July air temperature changes over the last 2000 years from Lake Latoriței (1530 m a.s.l.) in the Southern Carpathians. A multi-proxy analysis was performed along a 58 cm long sediment core and two training sets were used for quantitative July air temperature reconstructions: the Eastern-European (EE, 212 lakes) and the Finnish-Polish-Carpathian (FPC, 273 lakes). The transfer functions had a coefficient of determination (r2) 0.88 and 0.91 with a root mean squared error of prediction (RMSEP) 0.88°C and 1.02°C. Despite possible biases resulting from methodological problems and the ecological complexity of the chironomid response to both climatic and environmental changes, the agreement of the temperature reconstruction of Lake Latoriței with other alpine records suggests that the transfer function successfully reconstructed past summer temperatures between 750 and 1830 CE. Biases in the temperature reconstruction in the period before 750 and after 1830 CE were likely caused by increased abundance of rheophilic and semi-terrestrial chironomid species related to increased inflow activity before 750 CE and local land use changes after 1830 CE, which was also indicated by increasing deforestation and increasing lake productivity in the pollen and diatom records. Our results suggest that the region experienced a warm period between 750 and 1360 CE, and a cold period between 1360 and 1600 CE followed by fluctuating summer temperatures until 1830 CE. These events were associated with the so-called ‘Mediaeval Warm Period’ (MWP) and the ‘Little Ice Age’ (LIA), respectively. The inference models reconstructed a decrease in July air temperatures by 0.7°C–1.1°C during the LIA relative to the warmer MWP. We also demonstrated that the FPC training set gives better results, supporting that local/continental training sets are efficient to detect weak amplitude summer temperature changes in the Late-Holocene.},
	keywords = {Chironomids; late-Holocene; Finnish-Polish-Carpathian training set; mean July air temperature reconstruction; multi-proxy palaeoecology; RWP-LALIA-MWP-LIA},
	year = {2024},
	eissn = {1477-0911},
	orcid-numbers = {Korponai, János/0000-0003-0211-192X; Darabos, Gabriella/0000-0001-8070-5630; Magyari, Enikő Katalin/0000-0002-2844-8937}
}

@article{MTMT:34510709,
	title = {Investigation of the last two centuries sedimentation dynamics in high-altitude lakes of Southern Carpathians, Romania},
	url = {https://m2.mtmt.hu/api/publication/34510709},
	author = {Begy, Róbert-Csaba and Savin, Codrin-F. and Korponai, János and Magyari, Enikő Katalin and Kovács, Tibor},
	doi = {10.1038/s41598-024-51812-2},
	journal-iso = {SCI REP},
	journal = {SCIENTIFIC REPORTS},
	volume = {14},
	unique-id = {34510709},
	issn = {2045-2322},
	abstract = {This study investigates the last two centuries sedimentation dynamics in four high-altitude lakes located in Southern Carpathians, Romania. Furthermore, a novel approach is proposed for identifying the anthropic or natural underlying causes, by comparison of the acceleration of the change in sedimentation rate with a baseline growth rate trend provided by an isolated peat bog. The high-resolution chronologies were developed using the 210 Pb dating technique and the CRS model. 137 Cs alternative time-marker validated the age-depth models and reassured the quality of the results. The results indicated several short-interval high sedimentation events within the lake cores, yielding up to five times the average rate for the investigated period. The cause of the high sedimentation episodes was generally attributed to anthropic activities (primarily road construction) and extreme natural events. A first-order derivative equation was employed to plot the acceleration in the sedimentation rate of the lakes with the peat bog baseline. The discrepancies between the acceleration trends highlighted significant deviations from the natural variation tendencies and provided preliminary data regarding the underlying causes of the intense sedimentation periods.},
	year = {2024},
	eissn = {2045-2322},
	orcid-numbers = {Korponai, János/0000-0003-0211-192X; Magyari, Enikő Katalin/0000-0002-2844-8937; Kovács, Tibor/0000-0003-2606-0397}
}

@article{MTMT:34431729,
	title = {Dr. Forró László – Zsuga Katalin és Korponai János megemlékezése},
	url = {https://m2.mtmt.hu/api/publication/34431729},
	author = {Zsuga, Katalin and Korponai, János},
	journal-iso = {HIDROL KOZL},
	journal = {HIDROLÓGIAI KÖZLÖNY},
	volume = {103},
	unique-id = {34431729},
	issn = {0018-1323},
	year = {2023},
	eissn = {2939-8495},
	pages = {81-81},
	orcid-numbers = {Korponai, János/0000-0003-0211-192X}
}

@article{MTMT:34210675,
	title = {Diatom-based paleoenvironmental reconstruction in Lake Balaton, Hungary (Tó34f)},
	url = {https://m2.mtmt.hu/api/publication/34210675},
	author = {Binti Mahadi, Izzati Hanun and Báldi, Katalin and Korponai, János and Buczkó, Krisztina},
	doi = {10.17110/StudBot.2023.54.1.5},
	journal-iso = {STUD BOT HUNG},
	journal = {STUDIA BOTANICA HUNGARICA},
	volume = {54},
	unique-id = {34210675},
	issn = {0301-7001},
	abstract = {A high-resolution diatom assemblage’s database was built on a 65 cm long sediment core (Tó34f), obtained from the Siófok Basin of Lake Balaton in 2017. Light microscope photo-documentation was developed out of 15,797 diatom valves. The pictures were arranged according to taxonomy from centric diatoms via araphids, monoraphids to biraphid forms. 30 categories were established to group the diatom taxa instead of species level identification requiring high level of expertise. Some (1) characteristic, and easily identifiable taxa (Karayevia clevei, Cavinula scutelloides) were distinguished on species level, (2) taxa were grouped at genus level (like Amphora, Aulacoseira, Neidium), while (3) were joined based on their morphological features. Two large groups were created based on this approach, the “light fragilarioids” and the “heavy fragilarioids”. Both groups contain diatoms with taxonomic problems, e.g. Staurosira, Staurosirella genera and other fragilarioids. This approach allowed us to make paleo-ecological reconstruction on (1) rough taxonomic data and (2) apply trait-based methods. Diatom assemblage’s zones were defined by CONISS clustering method, validated by the broken stick model. Though the planktonic trait (referring the high lake level) is insignificant (< 5%) in most of the studied record, but some peaks (>35%) point to high water level. The most recent trend of increasing number of planktonic diatoms is hypothesized to be due to the recent global warming. We demonstrated that traits are a good alternative to time and expertise demanding species-level determination of diatoms, thus a quick method is found for paleo-ecological reconstructions, while the photo-base good for detailed taxonomic work at a future time.},
	year = {2023},
	pages = {5-38},
	orcid-numbers = {Báldi, Katalin/0000-0002-9154-2045; Korponai, János/0000-0003-0211-192X}
}

@misc{MTMT:34177863,
	title = {Ecosystem response to climate change and human impact in South Carpathian alpine lakes: can we define restoration targets?},
	url = {https://m2.mtmt.hu/api/publication/34177863},
	author = {Tombor, Eszter and Szabó, Zoltán and Andreea-Rebeka, Zsigmond and Marta, Wojewódja-Przybyl and Krisztina, Buczkó and Korponai, János and Róbert-Csaba, Begy and Magyari, Enikő Katalin},
	unique-id = {34177863},
	year = {2023},
	orcid-numbers = {Korponai, János/0000-0003-0211-192X; Magyari, Enikő Katalin/0000-0002-2844-8937}
}

@article{MTMT:34147875,
	title = {Lake morphology as an important constraint for benthic diatoms in temperate, humic forest ponds},
	url = {https://m2.mtmt.hu/api/publication/34147875},
	author = {Al-Imari, Tiba Jassam Kaison and Lengyel, Edina and Korponai, János and Padisák, Judit and Stenger-Kovács, Csilla},
	doi = {10.1016/j.ecolind.2023.110939},
	journal-iso = {ECOL INDIC},
	journal = {ECOLOGICAL INDICATORS},
	volume = {155},
	unique-id = {34147875},
	issn = {1470-160X},
	abstract = {Small lakes are among the most threatened ecosystems in the world. Their protection is of crucial importance since they support an unusually high biodiversity relative to their size. The present study aimed at selecting the main drivers, especially the role of the morphological variables, shaping benthic diatom communities in unique, but rarely investigated forest pond ecosystems in the temperate region, using traditional (species-based methods and diversity indices) and novel approaches (trait-based methods and functional diversity indices) of diatom ecology. Therefore, we analyzed the effects of the environmental (temperature, conductivity, colour, shading, pH, nutrient forms, anions) and morphological (surface area, depth) variables of 70 temperate, forest ponds located in two regions of Hungary on the composition (species- and trait-based) and diversity (traditional and functional) of their benthic diatom communities. Based on the multivariate analyses, no regional differences in the environmental and morphological variables were been observed among the ponds. Our results showed that both environmental variables and lake morphology had significant effects on the benthic diatom communities, but they contributed to their variation with different proportions. Environmental variables such as nutrient content (rsoluble reactive phosphate = 0.72) and conductivity (r = 0.65) affected mostly the species composition, and the traditional diversity metrics (rtotal phoshate = −0.42, rconductivity = −0.54). In contrast, morphological features of the ponds were the most important drivers of diatom trait composition. This functional response of diatoms manifested in the selection of species according to their size, shape and lifeforms, moreover, in changing of functional diversity. Overall, this study revealed the complex interplay between environmental variables and lake morphology in shaping the composition of benthic diatom communities. Furthermore, it highlights the necessity to apply different methods to understand the ecology and functioning of these special aquatic ecosystems.},
	keywords = {Diatoms; diversity metrics; Morphological parameters; traits; forest ponds},
	year = {2023},
	eissn = {1872-7034},
	orcid-numbers = {Lengyel, Edina/0000-0003-3936-4154; Korponai, János/0000-0003-0211-192X; Padisák, Judit/0000-0001-8285-2896; Stenger-Kovács, Csilla/0000-0001-6175-4904}
}

@article{MTMT:34019402,
	title = {Paleolimnológiai módszerek alkalmazásának korlátai sekély állóvizek esetében},
	url = {https://m2.mtmt.hu/api/publication/34019402},
	author = {Jakab, Jázmin and Böjthe, Andrea and Soltész, Andor Gergő and Korponai, János and Gyulai, István},
	doi = {10.59258/hk.11449},
	journal-iso = {HIDROL KOZL},
	journal = {HIDROLÓGIAI KÖZLÖNY},
	volume = {103},
	unique-id = {34019402},
	issn = {0018-1323},
	abstract = {Világszerte egyre inkább növekednek az aszályos időszakok, jelentősen csökkentek az állóvizeink vízszintjei. Paleolimnológiai vizsgálatok esetében az állóvizek üledékének tanulmányozása folyik, melynek segítségével a múltban lejátszódott folyamatok, illetve környezeti hatások elemzésére adódik lehetőség. Paleolimnológiai kutatások során, amikor az üledékben megőrződött szervezetek maradványait, beleértve a Cladocera maradványokat vizsgáljuk, a meder legmélyebb részéről szoktunk üledék mintát venni, mert a legmélyebb pontra sodródnak össze a maradványok. Hazánkban azonban a legnagyobb számban sekély vízterek fordulnak elő, így vizsgálatunk célja az volt, hogy megnézzük, sekély vízterek esetében célszerűbb lenne-e a több mintavételi pont kijelölése? A mintavételekre hat vízteret jelöltünk ki és mindegyik víztérből három mintát vettünk, úgy, hogy a mintavételi helyek legalább 75-100 m távolságban helyezkedjenek el egymástól. A medrekben a habitatok is hasonlóak voltak. Az eredmények azt mutatták, hogy egymástól 100 méteres távolságban lévő mintavételi ponton is különböző Cladocera egyedszámok és fajszámok azonosíthatók.},
	keywords = {Cladocera; Paleolimnológia; sekély állóvizek; heterogenitás; szubfosszilis},
	year = {2023},
	eissn = {2939-8495},
	pages = {46-51},
	orcid-numbers = {Korponai, János/0000-0003-0211-192X}
}

@{MTMT:33746530,
	title = {A Szent Anna-kráter tavi-lápi fejlődéstörténete},
	url = {https://m2.mtmt.hu/api/publication/33746530},
	author = {Buczkó, Krisztina and Máthé, István and Jakab, Gusztáv and Tóth, Mónika and Braun, Mihály and Korponai, János and Ács, Éva and Karátson, Dávid and Magyari, Enikő Katalin},
	booktitle = {A Kárpátok legfiatalabb tűzhányója, a Csomád. Vulkánosság, őskörnyezet, ember és táj.},
	unique-id = {33746530},
	year = {2023},
	pages = {157-170},
	orcid-numbers = {Jakab, Gusztáv/0000-0002-2569-5967; Korponai, János/0000-0003-0211-192X; Ács, Éva/0000-0003-1774-157X; Karátson, Dávid/0000-0003-0386-1239; Magyari, Enikő Katalin/0000-0002-2844-8937}
}

@misc{MTMT:34177846,
	title = {A Déli-Kárpátok hegyi tavainak ökoszisztéma változásai a növekvő légszennyezettség mellett az ipari forradalom kezdete óta},
	url = {https://m2.mtmt.hu/api/publication/34177846},
	author = {Szabó, Zoltán and Magyari, Enikő Katalin and Buczkó, Krisztina and Korponai, János and Tombor, Eszter},
	unique-id = {34177846},
	year = {2022},
	orcid-numbers = {Magyari, Enikő Katalin/0000-0002-2844-8937; Korponai, János/0000-0003-0211-192X}
}

@CONFERENCE{MTMT:33709053,
	title = {Stable isotopes, biogenic calcite crystal composition and biotic remains were used to infer Holocene paleoenvironmental conditions in Lake Balaton, the largest shallow waterbody in Central Europe},
	url = {https://m2.mtmt.hu/api/publication/33709053},
	author = {Magyari, Enikő Katalin and Pálfi, Ivett and Pósfai, Mihály and Buczkó, Krisztina and Demény, Attila and Czuppon, György and Szabó, Zoltán and Korponai, János and Szalai, Zoltán and Veres, D. and Arnaud, F. and Falus, György and Bihari, Árpád},
	booktitle = {Lagos, Memorias del Territorio},
	unique-id = {33709053},
	year = {2022},
	pages = {157-157},
	orcid-numbers = {Magyari, Enikő Katalin/0000-0002-2844-8937; Pálfi, Ivett/0000-0001-9814-3410; Pósfai, Mihály/0000-0001-9355-3533; Demény, Attila/0000-0003-0522-9018; Czuppon, György/0000-0002-7231-6042; Korponai, János/0000-0003-0211-192X; Szalai, Zoltán/0000-0001-5267-411X}
}