Diatom abundance in surface sediments of the Southern Ocean, 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
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...
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Format: | Dataset |
Language: | English |
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PANGAEA - Data Publisher for Earth & Environmental Science
2010
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Online Access: | https://dx.doi.org/10.1594/pangaea.681699 https://doi.pangaea.de/10.1594/PANGAEA.681699 |
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ftdatacite:10.1594/pangaea.681699 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
Event label Latitude of event Longitude of event Elevation of event DEPTH, sediment/rock Actinocyclus actinochilus Actinocyclus curvatulus Asteromphalus hookeri Asteromphalus hyalinus Asteromphalus parvulus Azpeitia tabularis var. tabularis Azpeitia tabularis var. egregius Chaetoceros spp. Eucampia antarctica Fragilariopsis curta Fragilariopsis cylindrus Fragilariopsis doliolus Fragilariopsis kerguelensis Fragilariopsis obliquecostata Fragilariopsis rhombica Fragilariopsis ritscheri Fragilariopsis separanda Fragilariopsis sublinearis Hemidiscus cuneiformis Nitzschia bicapitata Nitzschia kolaczeckii Porosira glacialis Pseudo-nitzschia turgiduloides Rhizosolenia antennata f. antennata Rhizosolenia antennata f. semispina Rhizosolenia bergonii Rhizosolenia sp. Rhizosolenia spp. Roperia tesselata Thalassionema nitzschioides forma 1 Thalassionema nitzschioides var. capitulata Thalassionema nitzschioides var. lanceolata Thalassionema nitzschioides var. parva Thalassionema spp. Thalassiosira antarctica Thalassiosira frenguelliopsis Thalassiosira gracilis var. expecta Thalassiosira gracilis var. gracilis Thalassiosira gravida Thalassiosira lentiginosa Thalassiosira oestrupii Thalassiosira oliverana Thalassiosira spp. Thalassiosira trifulta Thalassiosira tumida Thalassiothrix antarctica/longissima group Diatoms indeterminata Diatoms MultiCorer Plankton net Counting, diatoms ANT-XVIII/5a ANT-XI/3 ANT-XII/4 Polarstern Paleoenvironmental Reconstructions from Marine Sediments @ AWI AWI_Paleo |
spellingShingle |
Event label Latitude of event Longitude of event Elevation of event DEPTH, sediment/rock Actinocyclus actinochilus Actinocyclus curvatulus Asteromphalus hookeri Asteromphalus hyalinus Asteromphalus parvulus Azpeitia tabularis var. tabularis Azpeitia tabularis var. egregius Chaetoceros spp. Eucampia antarctica Fragilariopsis curta Fragilariopsis cylindrus Fragilariopsis doliolus Fragilariopsis kerguelensis Fragilariopsis obliquecostata Fragilariopsis rhombica Fragilariopsis ritscheri Fragilariopsis separanda Fragilariopsis sublinearis Hemidiscus cuneiformis Nitzschia bicapitata Nitzschia kolaczeckii Porosira glacialis Pseudo-nitzschia turgiduloides Rhizosolenia antennata f. antennata Rhizosolenia antennata f. semispina Rhizosolenia bergonii Rhizosolenia sp. Rhizosolenia spp. Roperia tesselata Thalassionema nitzschioides forma 1 Thalassionema nitzschioides var. capitulata Thalassionema nitzschioides var. lanceolata Thalassionema nitzschioides var. parva Thalassionema spp. Thalassiosira antarctica Thalassiosira frenguelliopsis Thalassiosira gracilis var. expecta Thalassiosira gracilis var. gracilis Thalassiosira gravida Thalassiosira lentiginosa Thalassiosira oestrupii Thalassiosira oliverana Thalassiosira spp. Thalassiosira trifulta Thalassiosira tumida Thalassiothrix antarctica/longissima group Diatoms indeterminata Diatoms MultiCorer Plankton net Counting, diatoms ANT-XVIII/5a ANT-XI/3 ANT-XII/4 Polarstern Paleoenvironmental Reconstructions from Marine Sediments @ AWI AWI_Paleo Esper, Oliver Gersonde, Rainer Kadagies, Nicole Diatom abundance in surface sediments of the Southern Ocean, 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 |
topic_facet |
Event label Latitude of event Longitude of event Elevation of event DEPTH, sediment/rock Actinocyclus actinochilus Actinocyclus curvatulus Asteromphalus hookeri Asteromphalus hyalinus Asteromphalus parvulus Azpeitia tabularis var. tabularis Azpeitia tabularis var. egregius Chaetoceros spp. Eucampia antarctica Fragilariopsis curta Fragilariopsis cylindrus Fragilariopsis doliolus Fragilariopsis kerguelensis Fragilariopsis obliquecostata Fragilariopsis rhombica Fragilariopsis ritscheri Fragilariopsis separanda Fragilariopsis sublinearis Hemidiscus cuneiformis Nitzschia bicapitata Nitzschia kolaczeckii Porosira glacialis Pseudo-nitzschia turgiduloides Rhizosolenia antennata f. antennata Rhizosolenia antennata f. semispina Rhizosolenia bergonii Rhizosolenia sp. Rhizosolenia spp. Roperia tesselata Thalassionema nitzschioides forma 1 Thalassionema nitzschioides var. capitulata Thalassionema nitzschioides var. lanceolata Thalassionema nitzschioides var. parva Thalassionema spp. Thalassiosira antarctica Thalassiosira frenguelliopsis Thalassiosira gracilis var. expecta Thalassiosira gracilis var. gracilis Thalassiosira gravida Thalassiosira lentiginosa Thalassiosira oestrupii Thalassiosira oliverana Thalassiosira spp. Thalassiosira trifulta Thalassiosira tumida Thalassiothrix antarctica/longissima group Diatoms indeterminata Diatoms MultiCorer Plankton net Counting, diatoms ANT-XVIII/5a ANT-XI/3 ANT-XII/4 Polarstern Paleoenvironmental Reconstructions from Marine Sediments @ AWI AWI_Paleo |
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 with warmer water conditions (> 4 °C), whereas Fragilariopsis curta, F. separanda, F. rhombica and Thalassiosira gracilis were correlated with cold SSST (< 1.5 °C). Under the second gradient relationship, Actinocyclus actinochilus and F. curta were the most important diatoms representative of the diatom distribution in relation to the observed mean summer and winter sea ice concentrations.Confirming these environmental relationships is crucial for the development of reference data sets used in quantitative estimations of palaeoclimatic and palaeoceanographic conditions with statistical methods. This new data set represents the first modernised treatment of diatom remains from the SE Pacific Ocean and generally supports the use of a circum-polar database for the determination of summer SST, sea ice and potentially biogenic silica distribution of the Southern Ocean back into the Late Quaternary. : Data are accessible on request: Rainer.Gersonde@awi.de |
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, 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 |
title_short |
Diatom abundance in surface sediments of the Southern Ocean, 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 |
title_full |
Diatom abundance in surface sediments of the Southern Ocean, 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 |
title_fullStr |
Diatom abundance in surface sediments of the Southern Ocean, 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 |
title_full_unstemmed |
Diatom abundance in surface sediments of the Southern Ocean, 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 |
title_sort |
diatom abundance in surface sediments of the southern ocean, 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 |
publisher |
PANGAEA - Data Publisher for Earth & Environmental Science |
publishDate |
2010 |
url |
https://dx.doi.org/10.1594/pangaea.681699 https://doi.pangaea.de/10.1594/PANGAEA.681699 |
geographic |
Antarctic Pacific Southern Ocean The Antarctic |
geographic_facet |
Antarctic Pacific Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Antarctica Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica Sea ice Southern Ocean |
op_relation |
https://dx.doi.org/10.1016/j.palaeo.2009.12.006 |
op_rights |
Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/pangaea.681699 https://doi.org/10.1016/j.palaeo.2009.12.006 |
_version_ |
1766246387454836736 |
spelling |
ftdatacite:10.1594/pangaea.681699 2023-05-15T13:47:07+02:00 Diatom abundance in surface sediments of the Southern Ocean, 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 Esper, Oliver Gersonde, Rainer Kadagies, Nicole 2010 text/tab-separated-values https://dx.doi.org/10.1594/pangaea.681699 https://doi.pangaea.de/10.1594/PANGAEA.681699 en eng PANGAEA - Data Publisher for Earth & Environmental Science https://dx.doi.org/10.1016/j.palaeo.2009.12.006 Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 CC-BY Event label Latitude of event Longitude of event Elevation of event DEPTH, sediment/rock Actinocyclus actinochilus Actinocyclus curvatulus Asteromphalus hookeri Asteromphalus hyalinus Asteromphalus parvulus Azpeitia tabularis var. tabularis Azpeitia tabularis var. egregius Chaetoceros spp. Eucampia antarctica Fragilariopsis curta Fragilariopsis cylindrus Fragilariopsis doliolus Fragilariopsis kerguelensis Fragilariopsis obliquecostata Fragilariopsis rhombica Fragilariopsis ritscheri Fragilariopsis separanda Fragilariopsis sublinearis Hemidiscus cuneiformis Nitzschia bicapitata Nitzschia kolaczeckii Porosira glacialis Pseudo-nitzschia turgiduloides Rhizosolenia antennata f. antennata Rhizosolenia antennata f. semispina Rhizosolenia bergonii Rhizosolenia sp. Rhizosolenia spp. Roperia tesselata Thalassionema nitzschioides forma 1 Thalassionema nitzschioides var. capitulata Thalassionema nitzschioides var. lanceolata Thalassionema nitzschioides var. parva Thalassionema spp. Thalassiosira antarctica Thalassiosira frenguelliopsis Thalassiosira gracilis var. expecta Thalassiosira gracilis var. gracilis Thalassiosira gravida Thalassiosira lentiginosa Thalassiosira oestrupii Thalassiosira oliverana Thalassiosira spp. Thalassiosira trifulta Thalassiosira tumida Thalassiothrix antarctica/longissima group Diatoms indeterminata Diatoms MultiCorer Plankton net Counting, diatoms ANT-XVIII/5a ANT-XI/3 ANT-XII/4 Polarstern Paleoenvironmental Reconstructions from Marine Sediments @ AWI AWI_Paleo Dataset dataset Supplementary Dataset 2010 ftdatacite https://doi.org/10.1594/pangaea.681699 https://doi.org/10.1016/j.palaeo.2009.12.006 2022-02-09T12:07:01Z 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 with warmer water conditions (> 4 °C), whereas Fragilariopsis curta, F. separanda, F. rhombica and Thalassiosira gracilis were correlated with cold SSST (< 1.5 °C). Under the second gradient relationship, Actinocyclus actinochilus and F. curta were the most important diatoms representative of the diatom distribution in relation to the observed mean summer and winter sea ice concentrations.Confirming these environmental relationships is crucial for the development of reference data sets used in quantitative estimations of palaeoclimatic and palaeoceanographic conditions with statistical methods. This new data set represents the first modernised treatment of diatom remains from the SE Pacific Ocean and generally supports the use of a circum-polar database for the determination of summer SST, sea ice and potentially biogenic silica distribution of the Southern Ocean back into the Late Quaternary. : Data are accessible on request: Rainer.Gersonde@awi.de Dataset Antarc* Antarctic Antarctica Sea ice Southern Ocean DataCite Metadata Store (German National Library of Science and Technology) Antarctic Pacific Southern Ocean The Antarctic |