Temporal evolution of IP25 and other highly branched isoprenoid lipids in sea ice and the underlying water column during an Arctic melting season
In recent years, certain mono- and di-unsaturated highly branched isoprenoid (HBI) alkene biomarkers (i.e., IP25 and HBI IIa) have emerged as useful proxies for sea ice in the Arctic and Antarctic, respectively. Despite the relatively large number of sea ice reconstructions based on IP25 and HBI IIa...
Published in: | Elementa: Science of the Anthropocene |
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Online Access: | http://dx.doi.org/10.1525/elementa.377 https://online.ucpress.edu/elementa/article-pdf/doi/10.1525/elementa.377/435380/377-6482-1-pb.pdf |
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crunicaliforniap:10.1525/elementa.377 2024-09-15T17:41:52+00:00 Temporal evolution of IP25 and other highly branched isoprenoid lipids in sea ice and the underlying water column during an Arctic melting season Amiraux, Rémi Smik, Lukas Köseoğlu, Denizcan Rontani, Jean-François Galindo, Virginie Grondin, Pierre-Luc Babin, Marcel Belt, Simon T. Deming, Jody W. Arrigo, Kevin 2019 http://dx.doi.org/10.1525/elementa.377 https://online.ucpress.edu/elementa/article-pdf/doi/10.1525/elementa.377/435380/377-6482-1-pb.pdf en eng University of California Press http://creativecommons.org/licenses/by/4.0/ Elementa: Science of the Anthropocene volume 7 ISSN 2325-1026 journal-article 2019 crunicaliforniap https://doi.org/10.1525/elementa.377 2024-07-04T04:26:30Z In recent years, certain mono- and di-unsaturated highly branched isoprenoid (HBI) alkene biomarkers (i.e., IP25 and HBI IIa) have emerged as useful proxies for sea ice in the Arctic and Antarctic, respectively. Despite the relatively large number of sea ice reconstructions based on IP25 and HBI IIa, considerably fewer studies have addressed HBI variability in sea ice or in the underlying water column during a spring bloom and ice melt season. In this study, we quantified IP25 and various other HBIs at high temporal and vertical resolution in sea ice and the underlying water column (suspended and sinking particulate organic matter) during a spring bloom/ice melt event in Baffin Bay (Canadian Arctic) as part of the Green Edge project. The IP25 data are largely consistent with those reported from some previous studies, but also highlight: (i) the short-term variability in its production in sea ice; (ii) the release of ice algae with high sinking rates following a switch in sea ice conditions from hyper- to hyposaline within the study period; and (iii) the occurrence of an under-ice phytoplankton bloom. Outcomes from change-point analysis conducted on chlorophyll a and IP25, together with estimates of the percentage of ice algal organic carbon in the water column, also support some previous investigations. The co-occurrence of other di- and tri-unsaturated HBIs (including the pelagic biomarker HBI III) in sea ice are likely to have originated from the diatom Berkeleya rutilans and/or the Pleurosigma and Rhizosolenia genera, residing either within the sea ice matrix or on its underside. Although a possible sea ice source for HBIs such as HBI III may also impact the use of such HBIs as pelagic counterparts to IP25 in the phytoplankton marker-IP25 index, we suggest that the impact is likely to be small based on HBI distribution data. Article in Journal/Newspaper Antarc* Antarctic Baffin Bay Baffin Bay Baffin ice algae Phytoplankton Sea ice University of California Press Elementa: Science of the Anthropocene 7 |
institution |
Open Polar |
collection |
University of California Press |
op_collection_id |
crunicaliforniap |
language |
English |
description |
In recent years, certain mono- and di-unsaturated highly branched isoprenoid (HBI) alkene biomarkers (i.e., IP25 and HBI IIa) have emerged as useful proxies for sea ice in the Arctic and Antarctic, respectively. Despite the relatively large number of sea ice reconstructions based on IP25 and HBI IIa, considerably fewer studies have addressed HBI variability in sea ice or in the underlying water column during a spring bloom and ice melt season. In this study, we quantified IP25 and various other HBIs at high temporal and vertical resolution in sea ice and the underlying water column (suspended and sinking particulate organic matter) during a spring bloom/ice melt event in Baffin Bay (Canadian Arctic) as part of the Green Edge project. The IP25 data are largely consistent with those reported from some previous studies, but also highlight: (i) the short-term variability in its production in sea ice; (ii) the release of ice algae with high sinking rates following a switch in sea ice conditions from hyper- to hyposaline within the study period; and (iii) the occurrence of an under-ice phytoplankton bloom. Outcomes from change-point analysis conducted on chlorophyll a and IP25, together with estimates of the percentage of ice algal organic carbon in the water column, also support some previous investigations. The co-occurrence of other di- and tri-unsaturated HBIs (including the pelagic biomarker HBI III) in sea ice are likely to have originated from the diatom Berkeleya rutilans and/or the Pleurosigma and Rhizosolenia genera, residing either within the sea ice matrix or on its underside. Although a possible sea ice source for HBIs such as HBI III may also impact the use of such HBIs as pelagic counterparts to IP25 in the phytoplankton marker-IP25 index, we suggest that the impact is likely to be small based on HBI distribution data. |
author2 |
Deming, Jody W. Arrigo, Kevin |
format |
Article in Journal/Newspaper |
author |
Amiraux, Rémi Smik, Lukas Köseoğlu, Denizcan Rontani, Jean-François Galindo, Virginie Grondin, Pierre-Luc Babin, Marcel Belt, Simon T. |
spellingShingle |
Amiraux, Rémi Smik, Lukas Köseoğlu, Denizcan Rontani, Jean-François Galindo, Virginie Grondin, Pierre-Luc Babin, Marcel Belt, Simon T. Temporal evolution of IP25 and other highly branched isoprenoid lipids in sea ice and the underlying water column during an Arctic melting season |
author_facet |
Amiraux, Rémi Smik, Lukas Köseoğlu, Denizcan Rontani, Jean-François Galindo, Virginie Grondin, Pierre-Luc Babin, Marcel Belt, Simon T. |
author_sort |
Amiraux, Rémi |
title |
Temporal evolution of IP25 and other highly branched isoprenoid lipids in sea ice and the underlying water column during an Arctic melting season |
title_short |
Temporal evolution of IP25 and other highly branched isoprenoid lipids in sea ice and the underlying water column during an Arctic melting season |
title_full |
Temporal evolution of IP25 and other highly branched isoprenoid lipids in sea ice and the underlying water column during an Arctic melting season |
title_fullStr |
Temporal evolution of IP25 and other highly branched isoprenoid lipids in sea ice and the underlying water column during an Arctic melting season |
title_full_unstemmed |
Temporal evolution of IP25 and other highly branched isoprenoid lipids in sea ice and the underlying water column during an Arctic melting season |
title_sort |
temporal evolution of ip25 and other highly branched isoprenoid lipids in sea ice and the underlying water column during an arctic melting season |
publisher |
University of California Press |
publishDate |
2019 |
url |
http://dx.doi.org/10.1525/elementa.377 https://online.ucpress.edu/elementa/article-pdf/doi/10.1525/elementa.377/435380/377-6482-1-pb.pdf |
genre |
Antarc* Antarctic Baffin Bay Baffin Bay Baffin ice algae Phytoplankton Sea ice |
genre_facet |
Antarc* Antarctic Baffin Bay Baffin Bay Baffin ice algae Phytoplankton Sea ice |
op_source |
Elementa: Science of the Anthropocene volume 7 ISSN 2325-1026 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1525/elementa.377 |
container_title |
Elementa: Science of the Anthropocene |
container_volume |
7 |
_version_ |
1810488159107022848 |