Diatom abundance in surface sediments of the Southern Ocean
The quantitative analysis of diatom assemblages preserved in 52 samples from the Bellingshausen and the Amundsen Seas provides the first comprehensive view on the distribution of diatoms in surface sediments of the eastern and central Pacific sector of the Southern Ocean. On a latitudinal transect a...
Main Authors: | , , |
---|---|
Format: | Dataset |
Language: | English |
Published: |
PANGAEA
2010
|
Subjects: | |
Online Access: | https://doi.pangaea.de/10.1594/PANGAEA.681699 https://doi.org/10.1594/PANGAEA.681699 |
id |
ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.681699 |
---|---|
record_format |
openpolar |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Actinocyclus actinochilus Actinocyclus curvatulus Amundsen Sea ANT-XI/3 ANT-XII/4 ANT-XVIII/5a Asteromphalus hookeri Asteromphalus hyalinus Asteromphalus parvulus AWI_Paleo Azpeitia tabularis var. egregius Azpeitia tabularis var. tabularis Chaetoceros spp. Counting diatoms DEPTH sediment/rock Diatoms indeterminata Elevation of event Eucampia antarctica Event label Fragilariopsis curta Fragilariopsis cylindrus Fragilariopsis doliolus Fragilariopsis kerguelensis Fragilariopsis obliquecostata Fragilariopsis rhombica Fragilariopsis ritscheri Fragilariopsis separanda Fragilariopsis sublinearis Hemidiscus cuneiformis Latitude of event Longitude of event MUC MultiCorer Nitzschia bicapitata Nitzschia kolaczeckii Paleoenvironmental Reconstructions from Marine Sediments @ AWI PLA Plankton net Polarstern Porosira glacialis PS2546-1 PS2547-2 PS2548-2 PS2550-2 PS2657-1 PS2659-2 PS2661-4 |
spellingShingle |
Actinocyclus actinochilus Actinocyclus curvatulus Amundsen Sea ANT-XI/3 ANT-XII/4 ANT-XVIII/5a Asteromphalus hookeri Asteromphalus hyalinus Asteromphalus parvulus AWI_Paleo Azpeitia tabularis var. egregius Azpeitia tabularis var. tabularis Chaetoceros spp. Counting diatoms DEPTH sediment/rock Diatoms indeterminata Elevation of event Eucampia antarctica Event label Fragilariopsis curta Fragilariopsis cylindrus Fragilariopsis doliolus Fragilariopsis kerguelensis Fragilariopsis obliquecostata Fragilariopsis rhombica Fragilariopsis ritscheri Fragilariopsis separanda Fragilariopsis sublinearis Hemidiscus cuneiformis Latitude of event Longitude of event MUC MultiCorer Nitzschia bicapitata Nitzschia kolaczeckii Paleoenvironmental Reconstructions from Marine Sediments @ AWI PLA Plankton net Polarstern Porosira glacialis PS2546-1 PS2547-2 PS2548-2 PS2550-2 PS2657-1 PS2659-2 PS2661-4 Esper, Oliver Gersonde, Rainer Kadagies, Nicole Diatom abundance in surface sediments of the Southern Ocean |
topic_facet |
Actinocyclus actinochilus Actinocyclus curvatulus Amundsen Sea ANT-XI/3 ANT-XII/4 ANT-XVIII/5a Asteromphalus hookeri Asteromphalus hyalinus Asteromphalus parvulus AWI_Paleo Azpeitia tabularis var. egregius Azpeitia tabularis var. tabularis Chaetoceros spp. Counting diatoms DEPTH sediment/rock Diatoms indeterminata Elevation of event Eucampia antarctica Event label Fragilariopsis curta Fragilariopsis cylindrus Fragilariopsis doliolus Fragilariopsis kerguelensis Fragilariopsis obliquecostata Fragilariopsis rhombica Fragilariopsis ritscheri Fragilariopsis separanda Fragilariopsis sublinearis Hemidiscus cuneiformis Latitude of event Longitude of event MUC MultiCorer Nitzschia bicapitata Nitzschia kolaczeckii Paleoenvironmental Reconstructions from Marine Sediments @ AWI PLA Plankton net Polarstern Porosira glacialis PS2546-1 PS2547-2 PS2548-2 PS2550-2 PS2657-1 PS2659-2 PS2661-4 |
description |
The quantitative analysis of diatom assemblages preserved in 52 samples from the Bellingshausen and the Amundsen Seas provides the first comprehensive view on the distribution of diatoms in surface sediments of the eastern and central Pacific sector of the Southern Ocean. On a latitudinal transect along 120°W, diatom valve accumulation rates (AR) reach maximum values (8–10 × 10**8 valves m**-2 yr**-1) in a zone extending over ca. 900 km between the Antarctic Polar Front and the maximum average winter sea ice extent and exceed those ARs obtained from an eastern transect along 90°W by one order of magnitude. Lowest diatom concentrations (1–3 × 10**6 valves g**-1) were encountered in sediments of the Sea Ice Zone, affected by winter and summer sea ice. The accumulation rate pattern of the most abundant diatom Fragilariopsis kerguelensis (> 50% abundance in 47 samples) mirrors the pattern of the total diatom valve AR and the biogenic silica (BSi) AR, making F. kerguelensis the major contributor to the BSi preserved at the sea floor. Relative abundances of diatom species and species groups were statistically compared with a selection of environmental variables, such as the mean summer sea surface temperature and salinity, mean annual surface nutrient concentration (nitrate, phosphate, silicon), mean annual water column stratification, mixed layer depth in summer, and mean summer and winter sea ice concentrations. Polynomial canonical redundancy analysis (RDA) revealed the biogeographic distribution of diatom species had the strongest relationship with summer sea surface temperature (SSST) out of the nine tested environmental variables. This relationship accounted for 69.6% of the total variance of the diatom distribution, with 29.7% explained by the first gradient (significantly correlated to SSST with r**2 = 0.941) and 15.6% explained by the second gradient (correlated to both summer and winter sea ice and silicon concentration). Azpeitia tabularis, Hemidiscus cuneiformis and Roperia tesselata were associated ... |
format |
Dataset |
author |
Esper, Oliver Gersonde, Rainer Kadagies, Nicole |
author_facet |
Esper, Oliver Gersonde, Rainer Kadagies, Nicole |
author_sort |
Esper, Oliver |
title |
Diatom abundance in surface sediments of the Southern Ocean |
title_short |
Diatom abundance in surface sediments of the Southern Ocean |
title_full |
Diatom abundance in surface sediments of the Southern Ocean |
title_fullStr |
Diatom abundance in surface sediments of the Southern Ocean |
title_full_unstemmed |
Diatom abundance in surface sediments of the Southern Ocean |
title_sort |
diatom abundance in surface sediments of the southern ocean |
publisher |
PANGAEA |
publishDate |
2010 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.681699 https://doi.org/10.1594/PANGAEA.681699 |
op_coverage |
MEDIAN LATITUDE: -62.043064 * MEDIAN LONGITUDE: -98.422545 * SOUTH-BOUND LATITUDE: -72.052000 * WEST-BOUND LONGITUDE: -120.929500 * NORTH-BOUND LATITUDE: -50.749000 * EAST-BOUND LONGITUDE: -82.220000 * DATE/TIME START: 1994-03-02T05:55:00 * DATE/TIME END: 2001-04-02T14:05:00 * MINIMUM DEPTH, sediment/rock: 0 m * MAXIMUM DEPTH, sediment/rock: 0 m |
long_lat |
ENVELOPE(-120.929500,-82.220000,-50.749000,-72.052000) |
geographic |
Antarctic Southern Ocean The Antarctic Amundsen Sea Pacific |
geographic_facet |
Antarctic Southern Ocean The Antarctic Amundsen Sea Pacific |
genre |
Amundsen Sea Antarc* Antarctic Antarctica Sea ice Southern Ocean |
genre_facet |
Amundsen Sea Antarc* Antarctic Antarctica Sea ice Southern Ocean |
op_source |
Supplement to: Esper, Oliver; Gersonde, Rainer; Kadagies, Nicole (2010): Diatom distribution in southeastern Pacific surface sediments and their relation to modern environmental variables. Palaeogeography, Palaeoclimatology, Palaeoecology, 287(1-4), 1-27, https://doi.org/10.1016/j.palaeo.2009.12.006 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.681699 https://doi.org/10.1594/PANGAEA.681699 |
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.681699 https://doi.org/10.1016/j.palaeo.2009.12.006 |
_version_ |
1766378823526383616 |
spelling |
ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.681699 2023-05-15T13:24:20+02:00 Diatom abundance in surface sediments of the Southern Ocean Esper, Oliver Gersonde, Rainer Kadagies, Nicole MEDIAN LATITUDE: -62.043064 * MEDIAN LONGITUDE: -98.422545 * SOUTH-BOUND LATITUDE: -72.052000 * WEST-BOUND LONGITUDE: -120.929500 * NORTH-BOUND LATITUDE: -50.749000 * EAST-BOUND LONGITUDE: -82.220000 * DATE/TIME START: 1994-03-02T05:55:00 * DATE/TIME END: 2001-04-02T14:05:00 * MINIMUM DEPTH, sediment/rock: 0 m * MAXIMUM DEPTH, sediment/rock: 0 m 2010-02-06 text/tab-separated-values, 2496 data points https://doi.pangaea.de/10.1594/PANGAEA.681699 https://doi.org/10.1594/PANGAEA.681699 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.681699 https://doi.org/10.1594/PANGAEA.681699 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Esper, Oliver; Gersonde, Rainer; Kadagies, Nicole (2010): Diatom distribution in southeastern Pacific surface sediments and their relation to modern environmental variables. Palaeogeography, Palaeoclimatology, Palaeoecology, 287(1-4), 1-27, https://doi.org/10.1016/j.palaeo.2009.12.006 Actinocyclus actinochilus Actinocyclus curvatulus Amundsen Sea ANT-XI/3 ANT-XII/4 ANT-XVIII/5a Asteromphalus hookeri Asteromphalus hyalinus Asteromphalus parvulus AWI_Paleo Azpeitia tabularis var. egregius Azpeitia tabularis var. tabularis Chaetoceros spp. Counting diatoms DEPTH sediment/rock Diatoms indeterminata Elevation of event Eucampia antarctica Event label Fragilariopsis curta Fragilariopsis cylindrus Fragilariopsis doliolus Fragilariopsis kerguelensis Fragilariopsis obliquecostata Fragilariopsis rhombica Fragilariopsis ritscheri Fragilariopsis separanda Fragilariopsis sublinearis Hemidiscus cuneiformis Latitude of event Longitude of event MUC MultiCorer Nitzschia bicapitata Nitzschia kolaczeckii Paleoenvironmental Reconstructions from Marine Sediments @ AWI PLA Plankton net Polarstern Porosira glacialis PS2546-1 PS2547-2 PS2548-2 PS2550-2 PS2657-1 PS2659-2 PS2661-4 Dataset 2010 ftpangaea https://doi.org/10.1594/PANGAEA.681699 https://doi.org/10.1016/j.palaeo.2009.12.006 2023-01-20T08:44:51Z The quantitative analysis of diatom assemblages preserved in 52 samples from the Bellingshausen and the Amundsen Seas provides the first comprehensive view on the distribution of diatoms in surface sediments of the eastern and central Pacific sector of the Southern Ocean. On a latitudinal transect along 120°W, diatom valve accumulation rates (AR) reach maximum values (8–10 × 10**8 valves m**-2 yr**-1) in a zone extending over ca. 900 km between the Antarctic Polar Front and the maximum average winter sea ice extent and exceed those ARs obtained from an eastern transect along 90°W by one order of magnitude. Lowest diatom concentrations (1–3 × 10**6 valves g**-1) were encountered in sediments of the Sea Ice Zone, affected by winter and summer sea ice. The accumulation rate pattern of the most abundant diatom Fragilariopsis kerguelensis (> 50% abundance in 47 samples) mirrors the pattern of the total diatom valve AR and the biogenic silica (BSi) AR, making F. kerguelensis the major contributor to the BSi preserved at the sea floor. Relative abundances of diatom species and species groups were statistically compared with a selection of environmental variables, such as the mean summer sea surface temperature and salinity, mean annual surface nutrient concentration (nitrate, phosphate, silicon), mean annual water column stratification, mixed layer depth in summer, and mean summer and winter sea ice concentrations. Polynomial canonical redundancy analysis (RDA) revealed the biogeographic distribution of diatom species had the strongest relationship with summer sea surface temperature (SSST) out of the nine tested environmental variables. This relationship accounted for 69.6% of the total variance of the diatom distribution, with 29.7% explained by the first gradient (significantly correlated to SSST with r**2 = 0.941) and 15.6% explained by the second gradient (correlated to both summer and winter sea ice and silicon concentration). Azpeitia tabularis, Hemidiscus cuneiformis and Roperia tesselata were associated ... Dataset Amundsen Sea Antarc* Antarctic Antarctica Sea ice Southern Ocean PANGAEA - Data Publisher for Earth & Environmental Science Antarctic Southern Ocean The Antarctic Amundsen Sea Pacific ENVELOPE(-120.929500,-82.220000,-50.749000,-72.052000) |