Response of benthic foraminiferal communities to changes in productivity and watermass conditions in the epicontinental Paratethys during the middle Miocene

Scheiner, Filip; Holcová, Katarı́na; Milovský, Rastislav; Doláková, Nela; Rigová, Jana

doi:10.1016/j.marmicro.2019.101750

Cited by 9 publications

(3 citation statements)

References 59 publications

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“…To estimate the variable intensity of coccolith damage structures, we selected a multiproxy interpreted paleoenvironment of the LOM‐1 core (Holcová et al, 2015, 2018; Scheiner et al, 2019). The LOM‐1 samples were deposited on a lower shelf to upper bathyal clearly above the lysocline.…”

Section: Discussionmentioning

confidence: 99%

“…We compared the results obtained for the Miocene sample from our experimental study with in situ fossil assemblages of the same age with different intensity of coccolith dissolution and To estimate the variable intensity of coccolith damage structures, we selected a multiproxy interpreted paleoenvironment of the LOM-1 core (Holcová et al, 2015(Holcová et al, , 2018Scheiner et al, 2019).…”

Section: Comparison With Known Fossil Assemblagesmentioning

confidence: 99%

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An experimental study on post‐mortem dissolution and overgrowth processes affecting coccolith assemblages: A rapid and complex process

Holcová

Scheiner

2022

Geobiology

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Coccolith dissolution together with post‐mortem morphological features are immensely important phenomena that can affect assemblage compositions, complicate taxonomic identification as well as provide valuable palaeoenvironmental insights. This study summarizes the effects of pH oscillations on post‐mortem coccolith morphologies and the abundances and compositions of calcareous nannoplankton assemblages in three distinct types of material—(i) Cretaceous chalk, (ii) Miocene marls, and (iii) late Holocene calcareous ooze. Two independent experimental runs within a semi‐enclosed system setting were realized to observe assemblage alterations. One experiment was realized with the presence of bacteria and, in contrast, the second one inhibited their potential effect on the studied system. The pH was gradually decreased within the range of 8.3–6.4 using a reaction of CO2 with H2O forming weak carbonic acid (H2CO3), thereby affecting [CO32−]. Further, a subsequent overgrowth study was carried out during spontaneous degassing accompanied by a gradual pH rise. The experiment revealed that the process and intensity of coccolith corrosion and subsequent overgrowth build‐ups are influenced by a plethora of different factors such as (i) pH and associated seawater chemistry, (ii) mineral composition of the sediment, (iii) the presence of coccoliths within a protective substrate (faecal pellets, pores, pits), and (iv) the presence/absence of bacteria. Nannoplankton assemblages with corroded coccoliths or with coccoliths with overgrowth build‐ups showed that the observed relative abundances of taxa experienced alteration from the original compositions. Additionally, extreme pH oscillations may result in enhanced morphological changes that make coccoliths unidentifiable structures, and might even evoke the absence of coccoliths in the fossil record.

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Section: Discussionmentioning

confidence: 99%

Section: Comparison With Known Fossil Assemblagesmentioning

confidence: 99%

An experimental study on post‐mortem dissolution and overgrowth processes affecting coccolith assemblages: A rapid and complex process

Holcová

Scheiner

2022

Geobiology

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“…The nominate taxon, Lenticulina sp., is an epifaunal/shallow infaunal, free and 611 active deposit feeder associated with shelf environments and water depths between 50 612 to 100 metres (Frenzel, 2000;Fisher and Arthur, 2002;Murray, 2014;Hewaidy et al, 613 2019). Similar to Lenticulina, Gyroidinoides represents a shallow infaunal genus, but 614 it is characterised by feeding on fresh organic matter while having an overall low food 615 demand (Schmiedl et al, 2000;Scheiner et al, 2019). The preference for fresh 616 organic matter might differentiate Gyroidinoides from organodetritus-feeding 617 Lenticulina sp.…”

Section: The "Lenticulina -Gyroidinoides -Agglutinated Foraminifera" ...mentioning

confidence: 99%

Response of foraminiferal assemblages to precession-paced environmental variation in a mid-latitude seaway: Late Turonian greenhouse of Central Europe

Chroustová

Holcová

Laurin

et al. 2021

Marine Micropaleontology

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A case study of paleoenvironmental interactions during the Miocene Climate Optimum in southwestern Paratethys

Kopecká

Holcová

Brlek

et al. 2022

Global and Planetary Change

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Response of benthic foraminiferal communities to changes in productivity and watermass conditions in the epicontinental Paratethys during the middle Miocene

Cited by 9 publications

References 59 publications

An experimental study on post‐mortem dissolution and overgrowth processes affecting coccolith assemblages: A rapid and complex process

An experimental study on post‐mortem dissolution and overgrowth processes affecting coccolith assemblages: A rapid and complex process

Response of foraminiferal assemblages to precession-paced environmental variation in a mid-latitude seaway: Late Turonian greenhouse of Central Europe

A case study of paleoenvironmental interactions during the Miocene Climate Optimum in southwestern Paratethys

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