TY  - JOUR
AU  - Karlik, Máté
AU  - Fekete, József
AU  - Mindrescu, M
AU  - Grădinaru, I
AU  - Bozsó, Gábor
AU  - Biró, Lóránt
AU  - Kern, Zoltán
TI  - Natural and anthropogenic changes in a lake-forest system in Bukovina (Romania) since 1340 AD documented by sedimentary organic geochemistry (C, N and n-alkanes)
JF  - QUATERNARY INTERNATIONAL
J2  - QUATERN INT
VL  - 493
PY  - 2018
SP  - 166
EP  - 175
PG  - 10
SN  - 1040-6182
DO  - 10.1016/j.quaint.2018.06.008
UR  - https://m2.mtmt.hu/api/publication/3392243
ID  - 3392243
N1  - Funding Agency and Grant Number: European Union; State of Hungary; European Regional Development Fund [GINOP-2.3.2.-15-2016-00009]; National Research, Development and Innovation Office [K125060]; [LP2012-27/2012]\n Funding text: The research was supported by the European Union and the State of Hungary, co-financed by the European Regional Development Fund in the project of GINOP-2.3.2.-15-2016-00009 ICER. Thanks for the financial support of the National Research, Development and Innovation Office (K125060) and LP2012-27/2012. This is contribution No. 60 of 2ka Palaeoclimatology Research Group.\n
AB  - Lake Bolatau-Feredeu is a small (surface: 0.3 ha; catchment area: 31 ha) landslide-dammed lake in Bukovina (Eastern Carpathians, Romania). Elemental concentration, stable isotope composition of carbon and nitrogen, and n-alkane composition of the saturated hydrocarbon fraction of the organic material were analyzed along the sediment profile from Lake Bolatau-Feredeu covering the past 700 years. The ranges of delta C-13 values (- 30.5 to - 26.6 parts per thousand) and C/N atomic ratios (10.5 and 15.4) placed the organic material of the recent Bolatau-Feredeu sediment between the C3 Land Plants and the lacustrine algae. The n-alkane proxies provide better distinction between organic matter inputs. Detected major shifts in the n-alkane composition and the C and N concentrations along with the stable isotope compositions pointed towards three distinct stages in the environmental history of the lake-catchment system. The proxy information indicate a substantial landscape change characterized by deforestation and an increase in open pastureland with herbaceous vegetation from similar to 1820. The C/N, delta N-15, and delta C-13 values showed the highest variability probably linked to a variable lacustrine environment and decreased productivity in the catchment between similar to 1640 and 1760. It can be assumed that the extended periods of lake ice cover during the cold decades experienced at the turn of the 17th -18th centuries resulted in diminished biological productivity both in the lake and its catchment. Finally, afforestation and the decline in lake productivity have been reconstructed for the period of - 1470-1560.
LA  - English
DB  - MTMT
ER  - 

TY  - JOUR
AU  - Bihari, Árpád
AU  - Karlik, Máté
AU  - Mîndrescu, M
AU  - Szalai, Zoltán
AU  - Grădinaru, I
AU  - Kern, Zoltán
TI  - Fallout isotope chronology of the near-surface sediment record of Lake Bolătău
JF  - JOURNAL OF ENVIRONMENTAL RADIOACTIVITY
J2  - J ENVIRON RADIOACTIV
VL  - 181
PY  - 2018
SP  - 32
EP  - 41
PG  - 10
SN  - 0265-931X
DO  - 10.1016/j.jenvrad.2017.10.009
UR  - https://m2.mtmt.hu/api/publication/3288140
ID  - 3288140
LA  - English
DB  - MTMT
ER  -