TY  - JOUR
AU  - Zsiborás, Gábor
AU  - Görög, Ágnes
TI  - Aalenian–Lower Bajocian Foraminiferal Fauna from the Ammonitico Rosso Series of Bakonycsernye (Hungary). Part 2: Palaeoecological and Palaeobiogeographical Aspects
JF  - JOURNAL OF FORAMINIFERAL RESEARCH
J2  - J FORAMIN RES
VL  - 50
PY  - 2020
IS  - 1
SP  - 73
EP  - 88
PG  - 16
SN  - 0096-1191
DO  - 10.2113/gsjfr.50.1.73
UR  - https://m2.mtmt.hu/api/publication/31189125
ID  - 31189125
N1  - Funding Agency and Grant Number: Hantken Foundation
            Funding text: Sincere thanks are due to Z. Evanics and M. Dunai who excavated the section and to Z. Kovacs for their help in the Aalenian ammonite biostratigraphy. We benefited from helpful advice from A. Galacz, I. Szente, Z. Evanics, J. Viszkok, and R. Wernli (Geneva). We are also grateful to S. Silva (Coimbra) who sent us the appendix of the foraminiferal taxa quantity in Silva et al. (2017). We extend our thanks to R. Pitt who improved the English of our manuscript. We are grateful to S. Silva and an anonymous referee for their constructive reviews. This study was supported by the Hantken Foundation.
AB  - This paper provides the first assessment of the paleoecology and biogeography of foraminiferal assemblages from the continuous Aalenian–lower Bajocian succession from the pelagic region of the Neotethys. Foraminiferal assemblages were extracted by glacial acetic acid from the Tűzkövesárok section B of Bakonycsernye (Hungary), which is well dated by ammonites and consists of Ammonitico Rosso type limestones. Palaeoenvironmental changes were evaluated based on microfacies studies, taxonomic and palaeoecological analyses (abundance, diversity, morphogroups, and ecozones) of the 49 benthic and one planktic taxa. The grazer-dominated foraminiferal assemblages indicated normal marine salinity and well-oxygenated conditions in a pelagic swell-graben environment below the photic zone. The majority of the foraminifera likely grazed on a biofilm or mat produced by microbes and/or fungi and also may have fed on marine snow. At the Aalenian–Bajocian transition, the decrease in abundance and diversity was linked with a sea-level fall event (JBj1). In the upper Bajocian, dissolution due to deepening resulted in the gradual and selective impoverishment of the fauna. In addition, two biomes, Boreal-Atlantic and Mediterranean, were distinguished within the area of the Boreal-Atlantic-Caucasian Province, based on the review of the coeval faunas.
LA  - English
DB  - MTMT
ER  -