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Holocene environmental history of the Bottomless Lake (Tăul fără fund) sphagnum peat bog in Bǎgǎu, Romania

Vári Tamás Zsolt, Molnár Dávid, Sümegi Pál, Sümegi Balázs Pál, Törőcsik Tünde, Szakál Edit, Benyó-Korcsmáros Réka

Studia Quaternaria

2020

Vol. 37, Nr 2

69--77

This work focuses on the paleoenvironmental and palaeoclimatological history of the undisturbed core sequence of 8.6 m extracted from the Bottomless Lake (Tăul fără fund) sphagnum peat bog located in Bǎgǎu, Romania, which covers the last 8,600 years based on radiocarbon dating. By comparing results of archaeological and palaeoenvironmental investigations carried out so far in the area, results of the loss on ignition analyses and the data of the chronological analyses, it was possible to reconstruct climatic factors and anthropogenic impacts on the local environment. The undisturbed core sequence has above 86% organic matter content all along excluding the erosion horizons. Anthropogenic effects (building, woodcutting, pasturage, husbandry, farming) and changes in the local climate, vegetation, and environment increased the rate of the erosion and decreased the rate of the accumulation.

Environmental history of the Csorna Plain (Western Danube Plain, NW Hungary) from the Late Glacial to the Late Holocene as seen from data of multiproxy geoarchaeological investigations

Törőcsik Tünde, Gulyás Sándor, Sümegi Pál, Sümegi Balázs, Molnár Dávid, Benyó-Korcsmáros Réka

Studia Quaternaria

2019

Vol. 36, Nr 1

19--43

This study presents the results of a comprehensive geoarchaeological study implemented at an archeological site covering ca. 5 ha near the city of Csorna on the NW part of the Danube Plain, NW Hungary. The site itself exposed a complex fluvial system of an ice age creek with near bank and overbank areas (levee, point bar, back swamp). Spatial distribution of archeological features allowed for the interpretation of differential use of the fluvial landscape by different cultures. According to our data, the referred fluvial system must have emerged during the Late Glacial. At this time, creeks originating from hills to the SE followed a uniform NW trajectory. From the Holocene, small creeks were beheaded turning into inactive flood channels. It was the time when the gradual infilling of the floodplain started. Alternating layers of floodwater coarses and floodplain fines mark recurring floods at our site. These could have been correlated with cooler, wetter climatic phases of the North Atlantic, Western Europe and high stands in Central European lakes. Highest floods are recorded during the Late Bronze and Iron Ages besides the Neolithic. Pollen data enabled us to make inferences on the vegetation as well.

Environmental history of the twentieth century. An introductory didactic course

Simeonov Vasil

Chemistry-Didactics-Ecology-Metrology

2019

R. 24, NR 1-2

7--21

The present manuscript presents the view point of the author for providing a course on environmental history for chemistry students and secondary school pupils. Special attention is paid on the societal developments in the twentieth century when the anthropogenic impacts on the environment have become especially deep and devastating. The course of lectures is focused on the environmental changes in each environmental phase (lithosphere, atmosphere, hydrosphere, biosphere) as well as in the society as a whole. The process of environmental changes is illustrated by various examples from each natural system in consideration and the anthropogenic factor for each one of them is defined and discussed. The presented material is an example for organization of an environmental history course of lecture which could be subject of additional information and conclusions related to the social attitude to the problem of environmental pollution and environmental risk assessment.