Colonization, succession, and extinction of marine floras during a glacial cycle:A case study from the Windmill Islands (east Antarctica) using biomarkers

With the exception of the diatoms, little is known of the extinction, colonization, and succession of marine floras during glacial cycles. Here we study both morphological and biochemical fossils in two sediment cores from the Antarctic to unravel the sequence of events over a single glacial cycle....

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Main Authors: Hodgson, Dominic A., McMinn, Andrew, Kirkup, Helen, Cremer, Holger, Gore, Damian, Melles, Martin, Roberts, Donna, Montiel, Pedro
Format: Article in Journal/Newspaper
Language:English
Published: 2003
Subjects:
Online Access:https://researchers.mq.edu.au/en/publications/6b5b2c1e-e3ec-4c29-8393-e4451b756105
https://research-management.mq.edu.au/ws/files/62303172/Publisher%20version%20(open%20access).pdf
http://www.scopus.com/inward/record.url?scp=0346271543&partnerID=8YFLogxK
id ftmacquarieunicr:oai:https://researchers.mq.edu.au:publications/6b5b2c1e-e3ec-4c29-8393-e4451b756105
record_format openpolar
spelling ftmacquarieunicr:oai:https://researchers.mq.edu.au:publications/6b5b2c1e-e3ec-4c29-8393-e4451b756105 2024-10-20T14:04:44+00:00 Colonization, succession, and extinction of marine floras during a glacial cycle:A case study from the Windmill Islands (east Antarctica) using biomarkers Hodgson, Dominic A. McMinn, Andrew Kirkup, Helen Cremer, Holger Gore, Damian Melles, Martin Roberts, Donna Montiel, Pedro 2003-09 application/pdf https://researchers.mq.edu.au/en/publications/6b5b2c1e-e3ec-4c29-8393-e4451b756105 https://research-management.mq.edu.au/ws/files/62303172/Publisher%20version%20(open%20access).pdf http://www.scopus.com/inward/record.url?scp=0346271543&partnerID=8YFLogxK eng eng info:eu-repo/semantics/openAccess Hodgson , D A , McMinn , A , Kirkup , H , Cremer , H , Gore , D , Melles , M , Roberts , D & Montiel , P 2003 , ' Colonization, succession, and extinction of marine floras during a glacial cycle : A case study from the Windmill Islands (east Antarctica) using biomarkers ' , Paleoceanography , vol. 18 , no. 3 , pp. 12-11 . Antarctic Flora Glaciation Ice shelves Quaternary article 2003 ftmacquarieunicr 2024-09-26T15:15:55Z With the exception of the diatoms, little is known of the extinction, colonization, and succession of marine floras during glacial cycles. Here we study both morphological and biochemical fossils in two sediment cores from the Antarctic to unravel the sequence of events over a single glacial cycle. The cores, from the nearshore continental shelf off the Windmill Islands (66°S, 110°E), east Antarctica, span the period from Marine Isotope Stage 3 or earlier to the present. New high-performance liquid chromatography and mass spectrometry methods were used to study fossil pigments with additional data from siliceous microfossils, lithological analyses, and radiocarbon dates. Results show two response processes. First, there is the large-scale impact of the expanding ice sheet in removing the flora from the inner shelf, primarily through the denial of light, destabilization of the substratum, and elimination of habitats. Second, there are a number of glacial climate interactions that have a surprisingly strong influence on recolonization and succession. These include sea ice extent and the proximity of the ice edge, the annual duration of open water, the stabilization of the substratum first by benthic diatoms and later by macrophyte algae, and relative sea level. A period of warmer climate in the mid-Holocene had a considerable influence on the composition and species diversity of the marine flora. These are the first data on the timing of colonization and succession of marine floras over a glacial cycle based on both morphological and biochemical fossils. Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica Ice Sheet Ice Shelves Sea ice Windmill Islands Macquarie University Research Portal Antarctic The Antarctic East Antarctica Windmill Islands ENVELOPE(110.417,110.417,-66.350,-66.350)
institution Open Polar
collection Macquarie University Research Portal
op_collection_id ftmacquarieunicr
language English
topic Antarctic
Flora
Glaciation
Ice shelves
Quaternary
spellingShingle Antarctic
Flora
Glaciation
Ice shelves
Quaternary
Hodgson, Dominic A.
McMinn, Andrew
Kirkup, Helen
Cremer, Holger
Gore, Damian
Melles, Martin
Roberts, Donna
Montiel, Pedro
Colonization, succession, and extinction of marine floras during a glacial cycle:A case study from the Windmill Islands (east Antarctica) using biomarkers
topic_facet Antarctic
Flora
Glaciation
Ice shelves
Quaternary
description With the exception of the diatoms, little is known of the extinction, colonization, and succession of marine floras during glacial cycles. Here we study both morphological and biochemical fossils in two sediment cores from the Antarctic to unravel the sequence of events over a single glacial cycle. The cores, from the nearshore continental shelf off the Windmill Islands (66°S, 110°E), east Antarctica, span the period from Marine Isotope Stage 3 or earlier to the present. New high-performance liquid chromatography and mass spectrometry methods were used to study fossil pigments with additional data from siliceous microfossils, lithological analyses, and radiocarbon dates. Results show two response processes. First, there is the large-scale impact of the expanding ice sheet in removing the flora from the inner shelf, primarily through the denial of light, destabilization of the substratum, and elimination of habitats. Second, there are a number of glacial climate interactions that have a surprisingly strong influence on recolonization and succession. These include sea ice extent and the proximity of the ice edge, the annual duration of open water, the stabilization of the substratum first by benthic diatoms and later by macrophyte algae, and relative sea level. A period of warmer climate in the mid-Holocene had a considerable influence on the composition and species diversity of the marine flora. These are the first data on the timing of colonization and succession of marine floras over a glacial cycle based on both morphological and biochemical fossils.
format Article in Journal/Newspaper
author Hodgson, Dominic A.
McMinn, Andrew
Kirkup, Helen
Cremer, Holger
Gore, Damian
Melles, Martin
Roberts, Donna
Montiel, Pedro
author_facet Hodgson, Dominic A.
McMinn, Andrew
Kirkup, Helen
Cremer, Holger
Gore, Damian
Melles, Martin
Roberts, Donna
Montiel, Pedro
author_sort Hodgson, Dominic A.
title Colonization, succession, and extinction of marine floras during a glacial cycle:A case study from the Windmill Islands (east Antarctica) using biomarkers
title_short Colonization, succession, and extinction of marine floras during a glacial cycle:A case study from the Windmill Islands (east Antarctica) using biomarkers
title_full Colonization, succession, and extinction of marine floras during a glacial cycle:A case study from the Windmill Islands (east Antarctica) using biomarkers
title_fullStr Colonization, succession, and extinction of marine floras during a glacial cycle:A case study from the Windmill Islands (east Antarctica) using biomarkers
title_full_unstemmed Colonization, succession, and extinction of marine floras during a glacial cycle:A case study from the Windmill Islands (east Antarctica) using biomarkers
title_sort colonization, succession, and extinction of marine floras during a glacial cycle:a case study from the windmill islands (east antarctica) using biomarkers
publishDate 2003
url https://researchers.mq.edu.au/en/publications/6b5b2c1e-e3ec-4c29-8393-e4451b756105
https://research-management.mq.edu.au/ws/files/62303172/Publisher%20version%20(open%20access).pdf
http://www.scopus.com/inward/record.url?scp=0346271543&partnerID=8YFLogxK
long_lat ENVELOPE(110.417,110.417,-66.350,-66.350)
geographic Antarctic
The Antarctic
East Antarctica
Windmill Islands
geographic_facet Antarctic
The Antarctic
East Antarctica
Windmill Islands
genre Antarc*
Antarctic
Antarctica
East Antarctica
Ice Sheet
Ice Shelves
Sea ice
Windmill Islands
genre_facet Antarc*
Antarctic
Antarctica
East Antarctica
Ice Sheet
Ice Shelves
Sea ice
Windmill Islands
op_source Hodgson , D A , McMinn , A , Kirkup , H , Cremer , H , Gore , D , Melles , M , Roberts , D & Montiel , P 2003 , ' Colonization, succession, and extinction of marine floras during a glacial cycle : A case study from the Windmill Islands (east Antarctica) using biomarkers ' , Paleoceanography , vol. 18 , no. 3 , pp. 12-11 .
op_rights info:eu-repo/semantics/openAccess
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