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001-es BibID:	BIBFORM109529
035-os BibID:	(cikkazonosító)48 (Scopus)85150945215 (WoS)000958860700001
Első szerző:	Fekete István
Cím:	Qualitative and Quantitative Changes in Soil Organic Compounds in Central European Oak Forests with Different Annual Average Precipitation / István Fekete, Ornella Francioso, Myrna J. Simpson, Paola Gioacchini, Daniela Montecchio, Imre Berki, Norbert Móricz, Katalin Juhos, Áron Béni, Zsolt Kotroczó
Dátum:	2023
ISSN:	2076-3298
Megjegyzések:	The various climate scenarios consistently predict warming and drying of forests in Hungary. Soils play a significant role in the long-term sequestration of atmospheric CO2, while in other cases they can also become net carbon emitters. Therefore, it is important to know what can be expected regarding future changes in the carbon storage capacity of soils in forests. We used precipitation gradient studies to solve this problem, using a type of "space?time" substitution. In this research, we primarily examined the quality parameters of soil organic matter (SOM) to investigate how climate change transforms the ratio of the main SOM compound groups in soils. For our studies, we applied elemental and 13C and 15N isotopic ratio analysis, NMR analysis, FT-IR spectra analysis, thermogravimetric and differential thermal analyses to measure SOM chemistry in samples from different oak forests with contrasting mean annual precipitation from Central Europe. Our results showed that soil organic carbon (SOC) was lower in soils of humid forests due to the enhanced decomposition processes and the leaching of Ca, which stabilizes SOM; however, in particular, the amount of easily degradable SOM compounds (e.g., thermolabile SOM, O-alkyl carbon, carboxylic and carbonyl carbon) decreased. In dry forest soils, the amount of recalcitrant SOM (e.g., thermostable SOM, alkyl carbon, aromatic and phenolic carbon and organo?mineral complexes stabilized by Ca increased, but the amount of easily degradable SOM increased further. The main conclusion of our study is that SOC can increase in forests that become drier, compensating somewhat for the decrease in forest plant biomass.
Tárgyszavak:	Természettudományok Kémiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk soil biology decomposition forest soil NMR FT-IR carbon climate change
Megjelenés:	Environments. - 10 : 3 (2023), p. 1-17. -
További szerzők:	Francioso, Ornella Simpson, Myrna J. Gioacchini, Paola Montecchio, Daniela Berki Imre Móricz Norbert Juhos Katalin Béni Áron (1978-) (vegyész) Kotroczó Zsolt (1975-) (biológus, ökológus)
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
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001-es BibID:	BIBFORM101732
Első szerző:	Fekete István
Cím:	Influence of different annual precipitation averages on carbon stock, detritus production and biological parameters of soils in dry and humid oak forests in Central Europe / István Fekete, Áron Béni, Imre Berki, Katalin Juhos, Gábor Várbíró, Csaba Varga, Ornella Francioso, Paola Gioacchini, Daniela Montecchio, Zsolt Kotroczó
Dátum:	2019
Tárgyszavak:	Természettudományok Környezettudományok előadáskivonat könyvrészlet litter production fungi biomass, enzyme activity soil organic carbon
Megjelenés:	Wageningen Soil Conference : Book of abstracts Understanding Soil Functions. - p. 19
További szerzők:	Béni Áron (1978-) (vegyész) Berki Imre Juhos Katalin Várbíró Gábor (biológus) Varga Csaba (agrár Nyíregyháza) Francioso, Ornella Gioacchini, Paola Montecchio, Daniela Kotroczó Zsolt (1975-) (biológus, ökológus)
Internet cím:	Intézményi repozitóriumban (DEA) tárolt változat
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001-es BibID:	BIBFORM100909
035-os BibID:	(WoS)000591000000001 (Scopus)85096346570
Első szerző:	Fekete István
Cím:	How will a drier climate change carbon sequestration in soils of the deciduous forests of Central Europe? / Fekete, István; Berki, Imre; Lajtha, Kate; Trumbore, Susan; Francioso, Ornella; Gioacchini, Paola; Montecchio, Daniela; Várbíró, Gábor; Béni, Áron; Makádi, Marianna; Demeter, Ibolya; Madarász, Balázs; Juhos, Katalin; Kotroczó, Zsolt
Dátum:	2020
ISSN:	0168-2563
Megjegyzések:	Global warming is accompanied by increasing water stress across much of our planet. We studied soil biological processes and changes in soil organic carbon (SOC) storage in 30 Hungarian oak forest sites in the Carpathian Basin along a climatic gradient (mean annual temperature (MAT) 9.6-12.1 degrees C, mean annual precipitation (MAP) 545-725 mm) but on similar gently sloped hillsides where the parent materials are loess and weathered dust inputs dating from the end of the ice age. The purpose of this research was to understand how a drying climate, predicted for this region, might regulate long-term SOC sequestration. To examine the effects of decreasing water availability, we compared soil parameters and processes in three categories of forest that represented the moisture extremes along our gradient and that were defined using a broken-stick regression model. Soil biological activity was significantly lower in the driest ("dry") forests, which had more than double the SOC concentration in the upper 30 cm layer (3.28 g C/100 g soil +/- 0.11 SE) compared to soils of the wettest ("humid") forests (1.32 g C/100 g soil +/- 0.09 SE), despite the fact that annual surface litter production in humid forests was similar to 37% higher than in dry forests. A two-pool SOM model constrained to fit radiocarbon data indicates that turnover times for fast and slow pools are about half as long in the humid soil compared to the dry soil, and humid soils transfer C twice as efficiently from fast to slow pools. Enzyme activity and fungal biomass data also imply shorter turnover times associated with faster degradation processes in the soils of humid forests. Thermogravimetry studies suggest that more chemically recalcitrant compounds are accumulating in the soils of dry forests. Taken together, our results suggest that the predicted climate drying in this region might increase SOC storage in Central European mesic deciduous forests even as litter production decreases.
Tárgyszavak:	Természettudományok Környezettudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk
Megjelenés:	Biogeochemistry. - 152 : 1 (2020), p. 13-32. -
További szerzők:	Berki Imre Lajtha, Kate Trumbore, Susan Francioso, Ornella Gioacchini, Paola Montecchio, Daniela Várbíró Gábor (biológus) Béni Áron (1978-) (vegyész) Makádi Marianna (1968-) (biológus) Demeter Ibolya (1985-) (anyagmérnök) Madarász Balázs Juhos Katalin Kotroczó Zsolt (1975-) (biológus, ökológus)
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
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