Benthic foraminifera in South Atlantic Ocean surface sediments
Benthic foraminiferal assemblages were analyzed on forty-eight surfacesediment samples which were taken with a multiple corer from the southern South Atlantic Ocean and the northern Angola-Basin. The short cores were split into 1-cm-thick slices down to 15 cm sediment depth. Live (with Rose Bengal s...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.787450 2023-05-15T15:42:11+02:00 Benthic foraminifera in South Atlantic Ocean surface sediments Schumacher, Stefanie MEDIAN LATITUDE: -46.994323 * MEDIAN LONGITUDE: -0.525872 * SOUTH-BOUND LATITUDE: -70.100000 * WEST-BOUND LONGITUDE: -41.987500 * NORTH-BOUND LATITUDE: 2.680000 * EAST-BOUND LONGITUDE: 39.921667 * DATE/TIME START: 1985-12-31T06:32:00 * DATE/TIME END: 1998-03-06T17:50:00 2001-08-16 application/zip, 8 datasets https://doi.pangaea.de/10.1594/PANGAEA.787450 https://doi.org/10.1594/PANGAEA.787450 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.787450 https://doi.org/10.1594/PANGAEA.787450 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Schumacher, Stefanie (2001): Mikrohabitatansprüche benthischer Foraminiferen in Sedimenten des Südatlantiks (Microhabitat preferences of benthic foraminifera in South Atlantic Ocean sediments). Berichte zur Polar- und Meeresforschung = Reports on Polar and Marine Research, 403, 151 pp, https://doi.org/10.2312/BzPM_0403_2001 AWI_Paleo Paleoenvironmental Reconstructions from Marine Sediments @ AWI SFB261 South Atlantic in Late Quaternary: Reconstruction of Budget and Currents Dataset 2001 ftpangaea https://doi.org/10.1594/PANGAEA.787450 https://doi.org/10.2312/BzPM_0403_2001 2023-01-20T07:32:39Z Benthic foraminiferal assemblages were analyzed on forty-eight surfacesediment samples which were taken with a multiple corer from the southern South Atlantic Ocean and the northern Angola-Basin. The short cores were split into 1-cm-thick slices down to 15 cm sediment depth. Live (with Rose Bengal stained) and dead faunas were counted separately. The data were used to calculate numerical faunal characteristics like standing stocks, benthic foraminifera accumulation rates, diversity, average living depth, and habitat depth. Additionally the live and dead faunas were grouped into a number of principal faunal endmembers by Q-mode principal component analysis. Faunal composition, numerical faunal characteristics, and isotopic composition of calcareous tests were correlated with available environmental variables. Oxygen content in Pore water and rates of primary production were calculated by faunal composition and benthic foraminifera accumulation rate. Some principal faunal endmembers of the analysis for the living fauna of the sediment surface, for the living fauna down to 11 cm sediment depth, and for the dead fauna of the sediment surface show almost identical assemblages. The total number of live specimens decreases with decreasing organic carbon flux rates. Living benthic foraminifera are found down to a maximum sediment depth of 11 cm in the southern South Atlantic Ocean and down to 5 cm in the northern Angola-Basin with a maximum number of specimens in the uppermost centimeter. Standing stock, species number, and diversity decrease with increasing sediment depth. Between 30 and 70 % of the total living population settles on the surface and within the uppermost centimeter of the sediment. Epifaunal species are living on the surface and within the first centimeter of the sediment. Most of infaunal species depict a maximum abundance near the surface. In sediments with low oxygen penetration depth specific calcareous species clearly depict a subsurface maximum. Comparisons of pore water dissolved oxygen contents ... Dataset Berichte zur Polar- und Meeresforschung Reports on Polar and Marine Research South Atlantic Ocean PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(-41.987500,39.921667,2.680000,-70.100000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
AWI_Paleo Paleoenvironmental Reconstructions from Marine Sediments @ AWI SFB261 South Atlantic in Late Quaternary: Reconstruction of Budget and Currents |
spellingShingle |
AWI_Paleo Paleoenvironmental Reconstructions from Marine Sediments @ AWI SFB261 South Atlantic in Late Quaternary: Reconstruction of Budget and Currents Schumacher, Stefanie Benthic foraminifera in South Atlantic Ocean surface sediments |
topic_facet |
AWI_Paleo Paleoenvironmental Reconstructions from Marine Sediments @ AWI SFB261 South Atlantic in Late Quaternary: Reconstruction of Budget and Currents |
description |
Benthic foraminiferal assemblages were analyzed on forty-eight surfacesediment samples which were taken with a multiple corer from the southern South Atlantic Ocean and the northern Angola-Basin. The short cores were split into 1-cm-thick slices down to 15 cm sediment depth. Live (with Rose Bengal stained) and dead faunas were counted separately. The data were used to calculate numerical faunal characteristics like standing stocks, benthic foraminifera accumulation rates, diversity, average living depth, and habitat depth. Additionally the live and dead faunas were grouped into a number of principal faunal endmembers by Q-mode principal component analysis. Faunal composition, numerical faunal characteristics, and isotopic composition of calcareous tests were correlated with available environmental variables. Oxygen content in Pore water and rates of primary production were calculated by faunal composition and benthic foraminifera accumulation rate. Some principal faunal endmembers of the analysis for the living fauna of the sediment surface, for the living fauna down to 11 cm sediment depth, and for the dead fauna of the sediment surface show almost identical assemblages. The total number of live specimens decreases with decreasing organic carbon flux rates. Living benthic foraminifera are found down to a maximum sediment depth of 11 cm in the southern South Atlantic Ocean and down to 5 cm in the northern Angola-Basin with a maximum number of specimens in the uppermost centimeter. Standing stock, species number, and diversity decrease with increasing sediment depth. Between 30 and 70 % of the total living population settles on the surface and within the uppermost centimeter of the sediment. Epifaunal species are living on the surface and within the first centimeter of the sediment. Most of infaunal species depict a maximum abundance near the surface. In sediments with low oxygen penetration depth specific calcareous species clearly depict a subsurface maximum. Comparisons of pore water dissolved oxygen contents ... |
format |
Dataset |
author |
Schumacher, Stefanie |
author_facet |
Schumacher, Stefanie |
author_sort |
Schumacher, Stefanie |
title |
Benthic foraminifera in South Atlantic Ocean surface sediments |
title_short |
Benthic foraminifera in South Atlantic Ocean surface sediments |
title_full |
Benthic foraminifera in South Atlantic Ocean surface sediments |
title_fullStr |
Benthic foraminifera in South Atlantic Ocean surface sediments |
title_full_unstemmed |
Benthic foraminifera in South Atlantic Ocean surface sediments |
title_sort |
benthic foraminifera in south atlantic ocean surface sediments |
publisher |
PANGAEA |
publishDate |
2001 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.787450 https://doi.org/10.1594/PANGAEA.787450 |
op_coverage |
MEDIAN LATITUDE: -46.994323 * MEDIAN LONGITUDE: -0.525872 * SOUTH-BOUND LATITUDE: -70.100000 * WEST-BOUND LONGITUDE: -41.987500 * NORTH-BOUND LATITUDE: 2.680000 * EAST-BOUND LONGITUDE: 39.921667 * DATE/TIME START: 1985-12-31T06:32:00 * DATE/TIME END: 1998-03-06T17:50:00 |
long_lat |
ENVELOPE(-41.987500,39.921667,2.680000,-70.100000) |
genre |
Berichte zur Polar- und Meeresforschung Reports on Polar and Marine Research South Atlantic Ocean |
genre_facet |
Berichte zur Polar- und Meeresforschung Reports on Polar and Marine Research South Atlantic Ocean |
op_source |
Supplement to: Schumacher, Stefanie (2001): Mikrohabitatansprüche benthischer Foraminiferen in Sedimenten des Südatlantiks (Microhabitat preferences of benthic foraminifera in South Atlantic Ocean sediments). Berichte zur Polar- und Meeresforschung = Reports on Polar and Marine Research, 403, 151 pp, https://doi.org/10.2312/BzPM_0403_2001 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.787450 https://doi.org/10.1594/PANGAEA.787450 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.787450 https://doi.org/10.2312/BzPM_0403_2001 |
_version_ |
1766375054646444032 |