Latest Maastrichtian middle- and high-latitude mosasaurs and fish isotopic composition: carbon source, thermoregulation strategy, and thermal latitudinal gradient
Abstract Here we report high-latitude stable isotope compositions of Maastrichtian fossil fish and marine reptiles (mainly mosasaurs) from Antarctica (64°S paleolatitude) and compare them with mid-paleolatitude samples from Argentine Patagonia (45°S). Disparities between the δ 13 C values of bony fi...
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Cambridge University Press (CUP)
2022
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crcambridgeupr:10.1017/pab.2022.38 2024-03-03T08:38:18+00:00 Latest Maastrichtian middle- and high-latitude mosasaurs and fish isotopic composition: carbon source, thermoregulation strategy, and thermal latitudinal gradient Leuzinger, Léa Kocsis, László Luz, Zoneibe Vennemann, Torsten Ulyanov, Alexey Fernández, Marta 2022 http://dx.doi.org/10.1017/pab.2022.38 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0094837322000380 en eng Cambridge University Press (CUP) http://creativecommons.org/licenses/by/4.0/ Paleobiology volume 49, issue 2, page 353-373 ISSN 0094-8373 1938-5331 Paleontology General Agricultural and Biological Sciences Ecology Ecology, Evolution, Behavior and Systematics journal-article 2022 crcambridgeupr https://doi.org/10.1017/pab.2022.38 2024-02-08T08:44:11Z Abstract Here we report high-latitude stable isotope compositions of Maastrichtian fossil fish and marine reptiles (mainly mosasaurs) from Antarctica (64°S paleolatitude) and compare them with mid-paleolatitude samples from Argentine Patagonia (45°S). Disparities between the δ 13 C values of bony fish and marine reptiles correspond to differences in the foraging ground (distance from the shore and depth), while dramatically higher δ 13 C values (by 18‰) in shark enameloid cannot be explained through ecology and are here imputed to biomineralization. Comparison with extant vertebrates suggests that the diet alone can explain the offset observed between bony fish and mosasaurs; however, breath holding due to a diving behavior in mosasaurs may have had some impact on their δ 13 C values, as previously suggested. The δ 18 O PO4 values of the remains confirm a relatively stable, elevated body temperature for marine reptiles, meaning that they were thermoregulators. We calculated a water temperature of ~8°C for Antarctica from the fish δ 18 O PO4 values, warmer than present-day temperatures and consistent with the absence of polar ice sheets during the latest Maastrichtian. Our fish data greatly extend the latitudinal range of Late Cretaceous fish δ 18 O PO4 values and result in a thermal gradient of 0.4°C/1° of latitude when combined with literature data. Article in Journal/Newspaper Antarc* Antarctica Cambridge University Press Patagonia Argentine Paleobiology 1 21 |
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Open Polar |
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Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Paleontology General Agricultural and Biological Sciences Ecology Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Paleontology General Agricultural and Biological Sciences Ecology Ecology, Evolution, Behavior and Systematics Leuzinger, Léa Kocsis, László Luz, Zoneibe Vennemann, Torsten Ulyanov, Alexey Fernández, Marta Latest Maastrichtian middle- and high-latitude mosasaurs and fish isotopic composition: carbon source, thermoregulation strategy, and thermal latitudinal gradient |
topic_facet |
Paleontology General Agricultural and Biological Sciences Ecology Ecology, Evolution, Behavior and Systematics |
description |
Abstract Here we report high-latitude stable isotope compositions of Maastrichtian fossil fish and marine reptiles (mainly mosasaurs) from Antarctica (64°S paleolatitude) and compare them with mid-paleolatitude samples from Argentine Patagonia (45°S). Disparities between the δ 13 C values of bony fish and marine reptiles correspond to differences in the foraging ground (distance from the shore and depth), while dramatically higher δ 13 C values (by 18‰) in shark enameloid cannot be explained through ecology and are here imputed to biomineralization. Comparison with extant vertebrates suggests that the diet alone can explain the offset observed between bony fish and mosasaurs; however, breath holding due to a diving behavior in mosasaurs may have had some impact on their δ 13 C values, as previously suggested. The δ 18 O PO4 values of the remains confirm a relatively stable, elevated body temperature for marine reptiles, meaning that they were thermoregulators. We calculated a water temperature of ~8°C for Antarctica from the fish δ 18 O PO4 values, warmer than present-day temperatures and consistent with the absence of polar ice sheets during the latest Maastrichtian. Our fish data greatly extend the latitudinal range of Late Cretaceous fish δ 18 O PO4 values and result in a thermal gradient of 0.4°C/1° of latitude when combined with literature data. |
format |
Article in Journal/Newspaper |
author |
Leuzinger, Léa Kocsis, László Luz, Zoneibe Vennemann, Torsten Ulyanov, Alexey Fernández, Marta |
author_facet |
Leuzinger, Léa Kocsis, László Luz, Zoneibe Vennemann, Torsten Ulyanov, Alexey Fernández, Marta |
author_sort |
Leuzinger, Léa |
title |
Latest Maastrichtian middle- and high-latitude mosasaurs and fish isotopic composition: carbon source, thermoregulation strategy, and thermal latitudinal gradient |
title_short |
Latest Maastrichtian middle- and high-latitude mosasaurs and fish isotopic composition: carbon source, thermoregulation strategy, and thermal latitudinal gradient |
title_full |
Latest Maastrichtian middle- and high-latitude mosasaurs and fish isotopic composition: carbon source, thermoregulation strategy, and thermal latitudinal gradient |
title_fullStr |
Latest Maastrichtian middle- and high-latitude mosasaurs and fish isotopic composition: carbon source, thermoregulation strategy, and thermal latitudinal gradient |
title_full_unstemmed |
Latest Maastrichtian middle- and high-latitude mosasaurs and fish isotopic composition: carbon source, thermoregulation strategy, and thermal latitudinal gradient |
title_sort |
latest maastrichtian middle- and high-latitude mosasaurs and fish isotopic composition: carbon source, thermoregulation strategy, and thermal latitudinal gradient |
publisher |
Cambridge University Press (CUP) |
publishDate |
2022 |
url |
http://dx.doi.org/10.1017/pab.2022.38 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0094837322000380 |
geographic |
Patagonia Argentine |
geographic_facet |
Patagonia Argentine |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_source |
Paleobiology volume 49, issue 2, page 353-373 ISSN 0094-8373 1938-5331 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1017/pab.2022.38 |
container_title |
Paleobiology |
container_start_page |
1 |
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21 |
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1792506395971551232 |