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

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985831%3A_____%2F19%3A00507825" target="_blank" >RIV/67985831:_____/19:00507825 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216224:14310/19:00112877 RIV/00216208:11310/19:10408633

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0377839819300428?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0377839819300428?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.marmicro.2019.101750" target="_blank" >10.1016/j.marmicro.2019.101750</a>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

The Langhian epicontinental sea - the Central Paratethys - represented a dynamic environment experiencing many changes, making it an ideal system for testing various geochemical proxies. Here we present a result of a study based on a combination of organic geochemistry (δ13Corg, n-alkane based indices, TOC/TIC) with benthic foraminiferal stable isotopic (δ13C, δ18O) and paleoecological data from the time interval of ~14.4 to 14.36 Ma. Moreover, we evaluated foraminiferal paleoecological data (selected species: Melonis pompilioides, Gyroidinoides spp., Cibicidoides spp.) together with the δ13C and δ18O to interpret the paleoecological consequences at the seafloor. Doing so we assessed the problematics regarding the origin of the organic matter together with changes in productivity and subsequent reaction of benthic foraminiferal assemblages at the seafloor. We used the δ13Corg, TOC/TIC and the n-alkane based indices to estimate the primary production rate and to determine the origin of the organic matter at the studied locality. The reconstructed paleoenvironment represented an open marine realm without significant freshwater influence, where the primary productivity was generated by marine algae. A gradual decrease of productivity could be observed, linked with shallowing of the basin towards a more carbonate-dominated environment. Changes in nutrient flux and vertical migration of the less oxygenated zone turned out to be the main phenomena responsible for physicochemical and paleoecological changes in the foraminiferal communities within the sediment. In addition we tried to characterize the population dynamics of the studied benthic foraminiferal species under a variety of existing conditions at the seafloor.

Název v anglickém jazyce

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

Popis výsledku anglicky

The Langhian epicontinental sea - the Central Paratethys - represented a dynamic environment experiencing many changes, making it an ideal system for testing various geochemical proxies. Here we present a result of a study based on a combination of organic geochemistry (δ13Corg, n-alkane based indices, TOC/TIC) with benthic foraminiferal stable isotopic (δ13C, δ18O) and paleoecological data from the time interval of ~14.4 to 14.36 Ma. Moreover, we evaluated foraminiferal paleoecological data (selected species: Melonis pompilioides, Gyroidinoides spp., Cibicidoides spp.) together with the δ13C and δ18O to interpret the paleoecological consequences at the seafloor. Doing so we assessed the problematics regarding the origin of the organic matter together with changes in productivity and subsequent reaction of benthic foraminiferal assemblages at the seafloor. We used the δ13Corg, TOC/TIC and the n-alkane based indices to estimate the primary production rate and to determine the origin of the organic matter at the studied locality. The reconstructed paleoenvironment represented an open marine realm without significant freshwater influence, where the primary productivity was generated by marine algae. A gradual decrease of productivity could be observed, linked with shallowing of the basin towards a more carbonate-dominated environment. Changes in nutrient flux and vertical migration of the less oxygenated zone turned out to be the main phenomena responsible for physicochemical and paleoecological changes in the foraminiferal communities within the sediment. In addition we tried to characterize the population dynamics of the studied benthic foraminiferal species under a variety of existing conditions at the seafloor.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10506 - Paleontology

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2019

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Marine Micropaleontology

ISSN

0377-8398

e-ISSN

—

Svazek periodika

151

Číslo periodika v rámci svazku

August 2019

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

12

Strana od-do

101750

Kód UT WoS článku

000488143600003

EID výsledku v databázi Scopus

2-s2.0-85068457796