Trochammina as opportunist foraminifera in the Lower Jurassic from north Siberia
The ecostratigraphic analysis of foraminiferal assemblages from Upper Pliensbachian to Lower Toarcian (Lower Jurassic) mudstones, siltstones and black shales from northern Siberia allows for a better understanding of the response to the benthic biotic crisis related to the Toarcian Oceanic Anoxic Ev...
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Norwegian Polar Institute
2014
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ftdoajarticles:oai:doaj.org/article:ea508b33f2de43a0a1977724519c6ca2 2023-05-15T15:04:42+02:00 Trochammina as opportunist foraminifera in the Lower Jurassic from north Siberia Matías Reolid Boris L. Nikitenko Larissa Glinskikh 2014-07-01T00:00:00Z https://doi.org/10.3402/polar.v33.21653 https://doaj.org/article/ea508b33f2de43a0a1977724519c6ca2 EN eng Norwegian Polar Institute http://www.polarresearch.net/index.php/polar/article/download/21653/pdf_1 https://doaj.org/toc/1751-8369 1751-8369 doi:10.3402/polar.v33.21653 https://doaj.org/article/ea508b33f2de43a0a1977724519c6ca2 Polar Research, Vol 33, Iss 0, Pp 1-14 (2014) r-strategists colonization anoxic event ecostratigraphy black shale Environmental sciences GE1-350 Oceanography GC1-1581 article 2014 ftdoajarticles https://doi.org/10.3402/polar.v33.21653 2022-12-31T08:45:30Z The ecostratigraphic analysis of foraminiferal assemblages from Upper Pliensbachian to Lower Toarcian (Lower Jurassic) mudstones, siltstones and black shales from northern Siberia allows for a better understanding of the response to the benthic biotic crisis related to the Toarcian Oceanic Anoxic Event in a high latitude context. The assemblages were dominated by agglutinated taxa with extremely low diversity values and dominance of Trochammina. These features suggest that the foraminiferal assemblages were adapted to restricted conditions, where the main limiting factors were salinity and oxygen degree. The opportunist behaviour of Trochammina enabled this genus to survive and adapt to unfavourable conditions. Trochammina proliferated in relation to the sea-level fall and probable changes in salinity in the Arctic palaeobasin during the Margaritatus Chron and at the beginning of the Viligaensis Chron (Late Pliensbachian). Another Trochammina proliferation is associated with the initial development of the restricted oxygen conditions related to the Toarcian Oceanic Anoxic Event. Article in Journal/Newspaper Arctic Foraminifera* Polar Research Siberia Directory of Open Access Journals: DOAJ Articles Arctic Polar Research 33 1 21653 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
r-strategists colonization anoxic event ecostratigraphy black shale Environmental sciences GE1-350 Oceanography GC1-1581 |
spellingShingle |
r-strategists colonization anoxic event ecostratigraphy black shale Environmental sciences GE1-350 Oceanography GC1-1581 Matías Reolid Boris L. Nikitenko Larissa Glinskikh Trochammina as opportunist foraminifera in the Lower Jurassic from north Siberia |
topic_facet |
r-strategists colonization anoxic event ecostratigraphy black shale Environmental sciences GE1-350 Oceanography GC1-1581 |
description |
The ecostratigraphic analysis of foraminiferal assemblages from Upper Pliensbachian to Lower Toarcian (Lower Jurassic) mudstones, siltstones and black shales from northern Siberia allows for a better understanding of the response to the benthic biotic crisis related to the Toarcian Oceanic Anoxic Event in a high latitude context. The assemblages were dominated by agglutinated taxa with extremely low diversity values and dominance of Trochammina. These features suggest that the foraminiferal assemblages were adapted to restricted conditions, where the main limiting factors were salinity and oxygen degree. The opportunist behaviour of Trochammina enabled this genus to survive and adapt to unfavourable conditions. Trochammina proliferated in relation to the sea-level fall and probable changes in salinity in the Arctic palaeobasin during the Margaritatus Chron and at the beginning of the Viligaensis Chron (Late Pliensbachian). Another Trochammina proliferation is associated with the initial development of the restricted oxygen conditions related to the Toarcian Oceanic Anoxic Event. |
format |
Article in Journal/Newspaper |
author |
Matías Reolid Boris L. Nikitenko Larissa Glinskikh |
author_facet |
Matías Reolid Boris L. Nikitenko Larissa Glinskikh |
author_sort |
Matías Reolid |
title |
Trochammina as opportunist foraminifera in the Lower Jurassic from north Siberia |
title_short |
Trochammina as opportunist foraminifera in the Lower Jurassic from north Siberia |
title_full |
Trochammina as opportunist foraminifera in the Lower Jurassic from north Siberia |
title_fullStr |
Trochammina as opportunist foraminifera in the Lower Jurassic from north Siberia |
title_full_unstemmed |
Trochammina as opportunist foraminifera in the Lower Jurassic from north Siberia |
title_sort |
trochammina as opportunist foraminifera in the lower jurassic from north siberia |
publisher |
Norwegian Polar Institute |
publishDate |
2014 |
url |
https://doi.org/10.3402/polar.v33.21653 https://doaj.org/article/ea508b33f2de43a0a1977724519c6ca2 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Foraminifera* Polar Research Siberia |
genre_facet |
Arctic Foraminifera* Polar Research Siberia |
op_source |
Polar Research, Vol 33, Iss 0, Pp 1-14 (2014) |
op_relation |
http://www.polarresearch.net/index.php/polar/article/download/21653/pdf_1 https://doaj.org/toc/1751-8369 1751-8369 doi:10.3402/polar.v33.21653 https://doaj.org/article/ea508b33f2de43a0a1977724519c6ca2 |
op_doi |
https://doi.org/10.3402/polar.v33.21653 |
container_title |
Polar Research |
container_volume |
33 |
container_issue |
1 |
container_start_page |
21653 |
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1766336433028595712 |