Reprint of Comparison of climate signals obtained from encrusting and free-living rhodolith coralline algae
oralline algae have been used for sclerochronological studies throughout the last decade. These studies have focused on two different growth morphologies of the photosynthetic coralline algae: massive crusts forming small buildups on hard substrate, and free-living branching algal nodules, known as...
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Online Access: | https://oceanrep.geomar.de/id/eprint/42028/ https://oceanrep.geomar.de/id/eprint/42028/1/Williams.pdf https://doi.org/10.1016/j.chemgeo.2018.02.030 |
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ftoceanrep:oai:oceanrep.geomar.de:42028 2023-05-15T15:14:34+02:00 Reprint of Comparison of climate signals obtained from encrusting and free-living rhodolith coralline algae Williams, Siobhan Halfar, Jochen Zack, Thomas Hetzinger, Steffen Blicher, Martin Juul-Pedersen, Thomas 2019 text https://oceanrep.geomar.de/id/eprint/42028/ https://oceanrep.geomar.de/id/eprint/42028/1/Williams.pdf https://doi.org/10.1016/j.chemgeo.2018.02.030 en eng Elsevier https://oceanrep.geomar.de/id/eprint/42028/1/Williams.pdf Williams, S., Halfar, J., Zack, T., Hetzinger, S. , Blicher, M. and Juul-Pedersen, T. (2019) Reprint of Comparison of climate signals obtained from encrusting and free-living rhodolith coralline algae. Chemical Geology, 526 . pp. 175-185. DOI 10.1016/j.chemgeo.2018.02.030 <https://doi.org/10.1016/j.chemgeo.2018.02.030>. doi:10.1016/j.chemgeo.2018.02.030 info:eu-repo/semantics/restrictedAccess Article PeerReviewed 2019 ftoceanrep https://doi.org/10.1016/j.chemgeo.2018.02.030 2023-04-07T15:38:36Z oralline algae have been used for sclerochronological studies throughout the last decade. These studies have focused on two different growth morphologies of the photosynthetic coralline algae: massive crusts forming small buildups on hard substrate, and free-living branching algal nodules, known as rhodoliths. The latter are generally found on soft-substrate, where they are frequently overturned by water movement and bottom feeding organisms, leaving one side of the rhodolith partially buried in the sediment at any given time. Here we test whether either of these growth morphologies is more suitable for proxy reconstructions by comparing Mg/Ca ratios – a temperature proxy – in multiple replicates of rhodoliths of Lithothamnion glaciale and in rhodoliths as well as encrusting specimens of Clathromorphum compactum. With both species being widespread throughout the Temperate and Arctic regions, we have chosen two North Atlantic localities at Nuuk Fjord, Greenland (Subarctic), and off the southeastern coast of Newfoundland, Canada (Temperate), for this study. Two to three Mg/Ca ratio transects spanning 18 years of growth were analysed on multiple specimens with encrusting morphologies and along different sides of rhodoliths using laser ablation inductively coupled mass spectrometry and compared to remotely sensed sea surface temperature (SST) data. The length of the common time span used for comparison was limited by growth interruptions in rhodoliths. Furthermore, our comparison is based on the assumption that rhodolith growth increments are annual – an assumption that has recently been challenged by mesocosm studies. Monthly Mg/Ca values from multiple transects within each individual were compared and in samples from Nuuk fjord significant correlations were found in 4 of 4 encrusting C. compactum, 4 of 4 C. compactum rhodoliths, and 2 of 3 L. glaciale rhodoliths. In Newfoundland significant correlations were found in 6 of 6 encrusting C. compactum comparisons (average: r = 0.61, p < 0.001), and in 6 of 6 L. ... Article in Journal/Newspaper Arctic Greenland Newfoundland North Atlantic Nuuk Subarctic OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Arctic Canada Greenland Nuuk ENVELOPE(-52.150,-52.150,68.717,68.717) Chemical Geology 526 175 185 |
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Open Polar |
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OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
oralline algae have been used for sclerochronological studies throughout the last decade. These studies have focused on two different growth morphologies of the photosynthetic coralline algae: massive crusts forming small buildups on hard substrate, and free-living branching algal nodules, known as rhodoliths. The latter are generally found on soft-substrate, where they are frequently overturned by water movement and bottom feeding organisms, leaving one side of the rhodolith partially buried in the sediment at any given time. Here we test whether either of these growth morphologies is more suitable for proxy reconstructions by comparing Mg/Ca ratios – a temperature proxy – in multiple replicates of rhodoliths of Lithothamnion glaciale and in rhodoliths as well as encrusting specimens of Clathromorphum compactum. With both species being widespread throughout the Temperate and Arctic regions, we have chosen two North Atlantic localities at Nuuk Fjord, Greenland (Subarctic), and off the southeastern coast of Newfoundland, Canada (Temperate), for this study. Two to three Mg/Ca ratio transects spanning 18 years of growth were analysed on multiple specimens with encrusting morphologies and along different sides of rhodoliths using laser ablation inductively coupled mass spectrometry and compared to remotely sensed sea surface temperature (SST) data. The length of the common time span used for comparison was limited by growth interruptions in rhodoliths. Furthermore, our comparison is based on the assumption that rhodolith growth increments are annual – an assumption that has recently been challenged by mesocosm studies. Monthly Mg/Ca values from multiple transects within each individual were compared and in samples from Nuuk fjord significant correlations were found in 4 of 4 encrusting C. compactum, 4 of 4 C. compactum rhodoliths, and 2 of 3 L. glaciale rhodoliths. In Newfoundland significant correlations were found in 6 of 6 encrusting C. compactum comparisons (average: r = 0.61, p < 0.001), and in 6 of 6 L. ... |
format |
Article in Journal/Newspaper |
author |
Williams, Siobhan Halfar, Jochen Zack, Thomas Hetzinger, Steffen Blicher, Martin Juul-Pedersen, Thomas |
spellingShingle |
Williams, Siobhan Halfar, Jochen Zack, Thomas Hetzinger, Steffen Blicher, Martin Juul-Pedersen, Thomas Reprint of Comparison of climate signals obtained from encrusting and free-living rhodolith coralline algae |
author_facet |
Williams, Siobhan Halfar, Jochen Zack, Thomas Hetzinger, Steffen Blicher, Martin Juul-Pedersen, Thomas |
author_sort |
Williams, Siobhan |
title |
Reprint of Comparison of climate signals obtained from encrusting and free-living rhodolith coralline algae |
title_short |
Reprint of Comparison of climate signals obtained from encrusting and free-living rhodolith coralline algae |
title_full |
Reprint of Comparison of climate signals obtained from encrusting and free-living rhodolith coralline algae |
title_fullStr |
Reprint of Comparison of climate signals obtained from encrusting and free-living rhodolith coralline algae |
title_full_unstemmed |
Reprint of Comparison of climate signals obtained from encrusting and free-living rhodolith coralline algae |
title_sort |
reprint of comparison of climate signals obtained from encrusting and free-living rhodolith coralline algae |
publisher |
Elsevier |
publishDate |
2019 |
url |
https://oceanrep.geomar.de/id/eprint/42028/ https://oceanrep.geomar.de/id/eprint/42028/1/Williams.pdf https://doi.org/10.1016/j.chemgeo.2018.02.030 |
long_lat |
ENVELOPE(-52.150,-52.150,68.717,68.717) |
geographic |
Arctic Canada Greenland Nuuk |
geographic_facet |
Arctic Canada Greenland Nuuk |
genre |
Arctic Greenland Newfoundland North Atlantic Nuuk Subarctic |
genre_facet |
Arctic Greenland Newfoundland North Atlantic Nuuk Subarctic |
op_relation |
https://oceanrep.geomar.de/id/eprint/42028/1/Williams.pdf Williams, S., Halfar, J., Zack, T., Hetzinger, S. , Blicher, M. and Juul-Pedersen, T. (2019) Reprint of Comparison of climate signals obtained from encrusting and free-living rhodolith coralline algae. Chemical Geology, 526 . pp. 175-185. DOI 10.1016/j.chemgeo.2018.02.030 <https://doi.org/10.1016/j.chemgeo.2018.02.030>. doi:10.1016/j.chemgeo.2018.02.030 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1016/j.chemgeo.2018.02.030 |
container_title |
Chemical Geology |
container_volume |
526 |
container_start_page |
175 |
op_container_end_page |
185 |
_version_ |
1766345004875251712 |