Data_Sheet_1_Accuracy of Otolith Oxygen Isotope Records Analyzed by SIMS as an Index of Temperature Exposure of Wild Icelandic Cod (Gadus morhua).docx
Global warming is increasing ocean temperatures, forcing marine organisms to respond to a suite of changing environmental conditions. The stable oxygen isotopic composition of otoliths is often used as an index of temperature exposure, but the accuracy of the resulting temperature reconstructions in...
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ftfrontimediafig:oai:figshare.com:article/16781197 2023-05-15T15:27:23+02:00 Data_Sheet_1_Accuracy of Otolith Oxygen Isotope Records Analyzed by SIMS as an Index of Temperature Exposure of Wild Icelandic Cod (Gadus morhua).docx Gotje von Leesen Hlynur Bardarson Sæmundur Ari Halldórsson Martin J. Whitehouse Steven E. Campana 2021-10-11T04:15:07Z https://doi.org/10.3389/fmars.2021.698908.s001 https://figshare.com/articles/dataset/Data_Sheet_1_Accuracy_of_Otolith_Oxygen_Isotope_Records_Analyzed_by_SIMS_as_an_Index_of_Temperature_Exposure_of_Wild_Icelandic_Cod_Gadus_morhua_docx/16781197 unknown doi:10.3389/fmars.2021.698908.s001 https://figshare.com/articles/dataset/Data_Sheet_1_Accuracy_of_Otolith_Oxygen_Isotope_Records_Analyzed_by_SIMS_as_an_Index_of_Temperature_Exposure_of_Wild_Icelandic_Cod_Gadus_morhua_docx/16781197 CC BY 4.0 CC-BY Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering accuracy Atlantic cod DST-tags SIMS stable oxygen isotopes Dataset 2021 ftfrontimediafig https://doi.org/10.3389/fmars.2021.698908.s001 2021-10-13T23:01:24Z Global warming is increasing ocean temperatures, forcing marine organisms to respond to a suite of changing environmental conditions. The stable oxygen isotopic composition of otoliths is often used as an index of temperature exposure, but the accuracy of the resulting temperature reconstructions in wild, free-swimming Atlantic cod (Gadus morhua) has never been groundtruthed. Based on temperatures from data storage tags (DST) and corresponding salinity values, the stable oxygen isotope (δ 18 O) value was predicted for each month of tagging and compared with δ 18 O otolith values measured in situ with secondary ion mass spectrometry (SIMS). Paired-sample Wilcoxon tests were applied to compare measured and predicted δ 18 O values. The difference between measured and predicted mean and maximum δ 18 O otolith values was not significant, suggesting a good correspondence between SIMS-measured and DST-predicted δ 18 O ot olith values. However, SIMS-measured and predicted minimum δ 18 O otolith values were significantly different (all samples: p < 0.01, coastal and frontal cod: p < 0.05), resulting in overestimation of maximum temperatures. Our results confirm that otoliths are well-suited as proxies for mean ambient temperature reconstructions. A possible matrix effect and the absence of a reliable aragonite standard for SIMS measurements appeared to cause a small divergence between measured and predicted δ 18 O otolith values, which affected the estimation accuracy of absolute temperature. However, relative temperature changes were accurately estimated by SIMS-analyzed δ 18 O otolith values. Dataset atlantic cod Gadus morhua Frontiers: Figshare |
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Open Polar |
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Frontiers: Figshare |
op_collection_id |
ftfrontimediafig |
language |
unknown |
topic |
Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering accuracy Atlantic cod DST-tags SIMS stable oxygen isotopes |
spellingShingle |
Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering accuracy Atlantic cod DST-tags SIMS stable oxygen isotopes Gotje von Leesen Hlynur Bardarson Sæmundur Ari Halldórsson Martin J. Whitehouse Steven E. Campana Data_Sheet_1_Accuracy of Otolith Oxygen Isotope Records Analyzed by SIMS as an Index of Temperature Exposure of Wild Icelandic Cod (Gadus morhua).docx |
topic_facet |
Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering accuracy Atlantic cod DST-tags SIMS stable oxygen isotopes |
description |
Global warming is increasing ocean temperatures, forcing marine organisms to respond to a suite of changing environmental conditions. The stable oxygen isotopic composition of otoliths is often used as an index of temperature exposure, but the accuracy of the resulting temperature reconstructions in wild, free-swimming Atlantic cod (Gadus morhua) has never been groundtruthed. Based on temperatures from data storage tags (DST) and corresponding salinity values, the stable oxygen isotope (δ 18 O) value was predicted for each month of tagging and compared with δ 18 O otolith values measured in situ with secondary ion mass spectrometry (SIMS). Paired-sample Wilcoxon tests were applied to compare measured and predicted δ 18 O values. The difference between measured and predicted mean and maximum δ 18 O otolith values was not significant, suggesting a good correspondence between SIMS-measured and DST-predicted δ 18 O ot olith values. However, SIMS-measured and predicted minimum δ 18 O otolith values were significantly different (all samples: p < 0.01, coastal and frontal cod: p < 0.05), resulting in overestimation of maximum temperatures. Our results confirm that otoliths are well-suited as proxies for mean ambient temperature reconstructions. A possible matrix effect and the absence of a reliable aragonite standard for SIMS measurements appeared to cause a small divergence between measured and predicted δ 18 O otolith values, which affected the estimation accuracy of absolute temperature. However, relative temperature changes were accurately estimated by SIMS-analyzed δ 18 O otolith values. |
format |
Dataset |
author |
Gotje von Leesen Hlynur Bardarson Sæmundur Ari Halldórsson Martin J. Whitehouse Steven E. Campana |
author_facet |
Gotje von Leesen Hlynur Bardarson Sæmundur Ari Halldórsson Martin J. Whitehouse Steven E. Campana |
author_sort |
Gotje von Leesen |
title |
Data_Sheet_1_Accuracy of Otolith Oxygen Isotope Records Analyzed by SIMS as an Index of Temperature Exposure of Wild Icelandic Cod (Gadus morhua).docx |
title_short |
Data_Sheet_1_Accuracy of Otolith Oxygen Isotope Records Analyzed by SIMS as an Index of Temperature Exposure of Wild Icelandic Cod (Gadus morhua).docx |
title_full |
Data_Sheet_1_Accuracy of Otolith Oxygen Isotope Records Analyzed by SIMS as an Index of Temperature Exposure of Wild Icelandic Cod (Gadus morhua).docx |
title_fullStr |
Data_Sheet_1_Accuracy of Otolith Oxygen Isotope Records Analyzed by SIMS as an Index of Temperature Exposure of Wild Icelandic Cod (Gadus morhua).docx |
title_full_unstemmed |
Data_Sheet_1_Accuracy of Otolith Oxygen Isotope Records Analyzed by SIMS as an Index of Temperature Exposure of Wild Icelandic Cod (Gadus morhua).docx |
title_sort |
data_sheet_1_accuracy of otolith oxygen isotope records analyzed by sims as an index of temperature exposure of wild icelandic cod (gadus morhua).docx |
publishDate |
2021 |
url |
https://doi.org/10.3389/fmars.2021.698908.s001 https://figshare.com/articles/dataset/Data_Sheet_1_Accuracy_of_Otolith_Oxygen_Isotope_Records_Analyzed_by_SIMS_as_an_Index_of_Temperature_Exposure_of_Wild_Icelandic_Cod_Gadus_morhua_docx/16781197 |
genre |
atlantic cod Gadus morhua |
genre_facet |
atlantic cod Gadus morhua |
op_relation |
doi:10.3389/fmars.2021.698908.s001 https://figshare.com/articles/dataset/Data_Sheet_1_Accuracy_of_Otolith_Oxygen_Isotope_Records_Analyzed_by_SIMS_as_an_Index_of_Temperature_Exposure_of_Wild_Icelandic_Cod_Gadus_morhua_docx/16781197 |
op_rights |
CC BY 4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.3389/fmars.2021.698908.s001 |
_version_ |
1766357825941929984 |