An expanded modern dinoflagellate cyst dataset for the Southwest Pacific and Southern Hemisphere with environmental associations
Organic-walled dinoflagellate cyst (dinocyst) assemblages were examined in 120 sea floor sediment samples from the Southwest (SW) Pacific to highlight dinocyst distribution in the region. From these 120 samples, census counts of 40 samples were added to previously published census data from the Sout...
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ftunivqespace:oai:espace.library.uq.edu.au:UQ:d0a27a3 2023-05-15T18:01:04+02:00 An expanded modern dinoflagellate cyst dataset for the Southwest Pacific and Southern Hemisphere with environmental associations Prebble, J. G. Crouch, E. M. Carter, L. Cortese, G. Bostock, H. Neil, H. 2013-05-01 https://espace.library.uq.edu.au/view/UQ:d0a27a3 eng eng Elsevier doi:10.1016/j.marmicro.2013.04.004 issn:0377-8398 issn:1872-6186 orcid:0000-0002-8903-8958 Sea-Surface Conditions East Australian Current New-Zealand Subtropical Front Hydrographic Conditions Phytoplankton Assemblages Planktonic-Foraminifera Physical Oceanography Primary Productivity Southland Current Journal Article 2013 ftunivqespace https://doi.org/10.1016/j.marmicro.2013.04.004 2020-10-27T06:43:16Z Organic-walled dinoflagellate cyst (dinocyst) assemblages were examined in 120 sea floor sediment samples from the Southwest (SW) Pacific to highlight dinocyst distribution in the region. From these 120 samples, census counts of 40 samples were added to previously published census data from the Southern Hemisphere to form a modern dataset of 311 samples (SH-311). Cluster analysis (k-means clustering) of a 98-sample sub-set from the SW Pacific (NZ-98) reveals four distinct assemblages which coincide with modern Subantarctic surface water, the Subtropical Front and two clusters from Subtropical surface water. A similar clustering of the SH-311 dataset reveals an additional three assemblages, two associated with Polar waters colder than those sampled in the SW Pacific, and one that may be endemic to the South Atlantic Ocean. Multivariate ordination (canonical correspondence analysis and redundancy analysis) indicates that the dinocyst assemblages change most along a sea surface temperature (SST) gradient, in both the regional SW Pacific and Southern Hemisphere datasets. SST accounts for 38% to 56% of the species-environmental relationship after removal of covarying variables, and contributes 2-3 times the explainable inertia than the other environmental variables tested. Both modern datasets (SH-311 and NZ-98) are suitable as a training set for quantitative palaeotemperature transfer functions applied to Late Quaternary records, with the caveat that the modern assemblage also displays sensitivity to productivity, shoreline proximity, bottom water oxygen, and water mass; variation that may be exploited in certain situations. (c) 2013 Elsevier B.V. All rights reserved. Article in Journal/Newspaper Planktonic foraminifera South Atlantic Ocean The University of Queensland: UQ eSpace Pacific New Zealand Marine Micropaleontology 101 33 48 |
institution |
Open Polar |
collection |
The University of Queensland: UQ eSpace |
op_collection_id |
ftunivqespace |
language |
English |
topic |
Sea-Surface Conditions East Australian Current New-Zealand Subtropical Front Hydrographic Conditions Phytoplankton Assemblages Planktonic-Foraminifera Physical Oceanography Primary Productivity Southland Current |
spellingShingle |
Sea-Surface Conditions East Australian Current New-Zealand Subtropical Front Hydrographic Conditions Phytoplankton Assemblages Planktonic-Foraminifera Physical Oceanography Primary Productivity Southland Current Prebble, J. G. Crouch, E. M. Carter, L. Cortese, G. Bostock, H. Neil, H. An expanded modern dinoflagellate cyst dataset for the Southwest Pacific and Southern Hemisphere with environmental associations |
topic_facet |
Sea-Surface Conditions East Australian Current New-Zealand Subtropical Front Hydrographic Conditions Phytoplankton Assemblages Planktonic-Foraminifera Physical Oceanography Primary Productivity Southland Current |
description |
Organic-walled dinoflagellate cyst (dinocyst) assemblages were examined in 120 sea floor sediment samples from the Southwest (SW) Pacific to highlight dinocyst distribution in the region. From these 120 samples, census counts of 40 samples were added to previously published census data from the Southern Hemisphere to form a modern dataset of 311 samples (SH-311). Cluster analysis (k-means clustering) of a 98-sample sub-set from the SW Pacific (NZ-98) reveals four distinct assemblages which coincide with modern Subantarctic surface water, the Subtropical Front and two clusters from Subtropical surface water. A similar clustering of the SH-311 dataset reveals an additional three assemblages, two associated with Polar waters colder than those sampled in the SW Pacific, and one that may be endemic to the South Atlantic Ocean. Multivariate ordination (canonical correspondence analysis and redundancy analysis) indicates that the dinocyst assemblages change most along a sea surface temperature (SST) gradient, in both the regional SW Pacific and Southern Hemisphere datasets. SST accounts for 38% to 56% of the species-environmental relationship after removal of covarying variables, and contributes 2-3 times the explainable inertia than the other environmental variables tested. Both modern datasets (SH-311 and NZ-98) are suitable as a training set for quantitative palaeotemperature transfer functions applied to Late Quaternary records, with the caveat that the modern assemblage also displays sensitivity to productivity, shoreline proximity, bottom water oxygen, and water mass; variation that may be exploited in certain situations. (c) 2013 Elsevier B.V. All rights reserved. |
format |
Article in Journal/Newspaper |
author |
Prebble, J. G. Crouch, E. M. Carter, L. Cortese, G. Bostock, H. Neil, H. |
author_facet |
Prebble, J. G. Crouch, E. M. Carter, L. Cortese, G. Bostock, H. Neil, H. |
author_sort |
Prebble, J. G. |
title |
An expanded modern dinoflagellate cyst dataset for the Southwest Pacific and Southern Hemisphere with environmental associations |
title_short |
An expanded modern dinoflagellate cyst dataset for the Southwest Pacific and Southern Hemisphere with environmental associations |
title_full |
An expanded modern dinoflagellate cyst dataset for the Southwest Pacific and Southern Hemisphere with environmental associations |
title_fullStr |
An expanded modern dinoflagellate cyst dataset for the Southwest Pacific and Southern Hemisphere with environmental associations |
title_full_unstemmed |
An expanded modern dinoflagellate cyst dataset for the Southwest Pacific and Southern Hemisphere with environmental associations |
title_sort |
expanded modern dinoflagellate cyst dataset for the southwest pacific and southern hemisphere with environmental associations |
publisher |
Elsevier |
publishDate |
2013 |
url |
https://espace.library.uq.edu.au/view/UQ:d0a27a3 |
geographic |
Pacific New Zealand |
geographic_facet |
Pacific New Zealand |
genre |
Planktonic foraminifera South Atlantic Ocean |
genre_facet |
Planktonic foraminifera South Atlantic Ocean |
op_relation |
doi:10.1016/j.marmicro.2013.04.004 issn:0377-8398 issn:1872-6186 orcid:0000-0002-8903-8958 |
op_doi |
https://doi.org/10.1016/j.marmicro.2013.04.004 |
container_title |
Marine Micropaleontology |
container_volume |
101 |
container_start_page |
33 |
op_container_end_page |
48 |
_version_ |
1766170397506535424 |