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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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001-es BibID:	BIBFORM100911
Első szerző:	Fekete István
Cím:	Magyarországi zonális tölgyerdők talajainak szén tartalma eltérő éves csapadék értékek mellett / Fekete István, Berki Imre, Béni Áron, Balláné Kovács Andrea, Madarász Balázs, Várbíró Gábor, Makádi Marianna, Demeter Ibolya, Juhos Katalin
Dátum:	2020
ISSN:	1216-9560
Tárgyszavak:	Természettudományok Környezettudományok konferenciacikk folyóiratcikk
Megjelenés:	Talajvédelem. - Különszám (2020), p. 176-186. -
További szerzők:	Berki Imre Béni Áron (1978-) (vegyész) Balláné Kovács Andrea (1967-) (vegyész) Madarász Balázs Várbíró Gábor (biológus) Makádi Marianna (1968-) (biológus) Demeter Ibolya (1985-) (anyagmérnök) Juhos Katalin
Pályázati támogatás:	125688 OTKA 126478 OTKA
Internet cím:	Intézményi repozitóriumban (DEA) tárolt változat Szerző által megadott URL
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001-es BibID:	BIBFORM079602
Első szerző:	Fekete István
Cím:	Long-term effects of climate change on carbon storage and tree species composition in a dry deciduous forest / István Fekete, Kate Lajtha, Zsolt Kotroczó, Gábor Várbíró, Csaba Varga, János Attila Tóth, Ibolya Demeter, Gábor Veperdi, Imre Berki
Dátum:	2017
ISSN:	1354-1013
Megjegyzések:	Forest vegetation and soils have been suggested as potentially important sinks forcarbon (C) with appropriate management and thus are implicated as effective toolsin stabilizing climate even with increasing anthropogenic release of CO2. Drought,however, which is often predicted to increase in models of future climate change,may limit net primary productio (NPP) of dry forest types, with unknown effects onsoil C storage. We studied C dynamics of a deciduous temperate forest of Hungarythat has been subject to significant decreases in precipitation and increases in tem-perature in recent decades. We resampled plots that were established in 1972 andrepeated the full C inventory by analyzing more than 4 decades of data on the num-ber of living trees, biomass of trees and shrubs, and soil C content. Our analysesshow that the decline in number and biomass of oaks started around the end of the1970s with a 71% reduction in the number of sessile oak stems by 2014. Projectedgrowth in this forest, based on the yield table's data for Hungary, was 4.6 kg C/m2.Although new species emerged, this new growth and small increases in oak biomassresulted in only 1.9 kg C/m2increase over 41 years. The death of oaks increasedinputs of coarse woody debris to the surface of the soil, much of which is still iden-tifiable, and caused an increase of 15.5%, or 2.6 kg C/m2, in the top 1 m of soil.Stability of this fresh organic matter input to surface soil is unknown, but is likely tobe low based on the results of a colocated woody litter decomposition study. Theeffects of a warmer and drier climate on the C balance of forests in this region willbe felt for decades to come as woody litter inputs decay, and forest growth remainsimpeded.
Tárgyszavak:	Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban coarse woody debris dry conditions in forest forest stand composition and diversity change net primary production oak decline Síkfőkút Forest soil carbon storage
Megjelenés:	Global Change Biology. - 23 : 8 (2017), p. 3154-3168. -
További szerzők:	Lajtha, Kate Kotroczó Zsolt (1975-) (biológus, ökológus) Várbíró Gábor (biológus) Varga Csaba Tóth János Attila (1945-) (ökológus) Demeter Ibolya (1985-) (anyagmérnök) Veperdi Gábor Berki Imre
Pályázati támogatás:	GINOP 2.3.3-15-2016-00019 GINOP
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
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