Morphometric changes in Watznaueria barnesiae across the mid Cretaceous: Paleoecological implications
This study reveals moderate yet important variations in Watznaueria barnesiae coccolith and central unit size throughout the Aptian–late Cenomanian (27 my) time interval in western Tethys. A new statistical approach was applied to determine whether non-random size trends apply to these metrics and t...
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ftunivnapoliiris:oai:www.iris.unina.it:11588/952635 2024-06-23T07:55:53+00:00 Morphometric changes in Watznaueria barnesiae across the mid Cretaceous: Paleoecological implications Bettoni, Chiara Erba, Elisabetta Castiglione, Silvia Raia, Pasquale Bottini, Cinzia Bettoni, Chiara Erba, Elisabetta Castiglione, Silvia Raia, Pasquale Bottini, Cinzia 2024 https://hdl.handle.net/11588/952635 https://www.sciencedirect.com/science/article/pii/S0377839824000136 eng eng volume:188 firstpage:102343 journal:MARINE MICROPALEONTOLOGY https://hdl.handle.net/11588/952635 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85183948850 https://www.sciencedirect.com/science/article/pii/S0377839824000136 info:eu-repo/semantics/article 2024 ftunivnapoliiris 2024-06-10T14:58:45Z This study reveals moderate yet important variations in Watznaueria barnesiae coccolith and central unit size throughout the Aptian–late Cenomanian (27 my) time interval in western Tethys. A new statistical approach was applied to determine whether non-random size trends apply to these metrics and to identify possible links between their variation and fertility or temperature. During OAE 1a, W. barnesiae coccoliths were the smallest and the most elliptical, with reduced central unit size. A further minor size decrease occurs during OAE 1b but not during OAE 1d. From the middle Albian to the middle Cenomanian, larger and less elliptical coccoliths are observed, with unchanged central unit dimensions. These results, together with concomitantly larger size changes in Biscutum constans confirm that W. barnesiae is a tolerant taxon. High-frequency, high-amplitude paleoenvironmental changes during the Aptian–early Albian indicate that temperature and fertility – either individually or in combination – had no direct impact on the mean coccolith size and potentially other factors affected coccolith size. Instead, lower nutrients with lower temperatures probably played a role in promoting larger W. barnesiae but smaller B. constans coccoliths during the middle Albian–Cenomanian. The size and ellipticity changes during OAE 1a and 1b were the strongest, likely resulting from ocean acidification and trace metal inputs, in addition to (or independently of) fertility and temperature variations. Article in Journal/Newspaper Ocean acidification IRIS Università degli Studi di Napoli Federico II |
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IRIS Università degli Studi di Napoli Federico II |
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ftunivnapoliiris |
language |
English |
description |
This study reveals moderate yet important variations in Watznaueria barnesiae coccolith and central unit size throughout the Aptian–late Cenomanian (27 my) time interval in western Tethys. A new statistical approach was applied to determine whether non-random size trends apply to these metrics and to identify possible links between their variation and fertility or temperature. During OAE 1a, W. barnesiae coccoliths were the smallest and the most elliptical, with reduced central unit size. A further minor size decrease occurs during OAE 1b but not during OAE 1d. From the middle Albian to the middle Cenomanian, larger and less elliptical coccoliths are observed, with unchanged central unit dimensions. These results, together with concomitantly larger size changes in Biscutum constans confirm that W. barnesiae is a tolerant taxon. High-frequency, high-amplitude paleoenvironmental changes during the Aptian–early Albian indicate that temperature and fertility – either individually or in combination – had no direct impact on the mean coccolith size and potentially other factors affected coccolith size. Instead, lower nutrients with lower temperatures probably played a role in promoting larger W. barnesiae but smaller B. constans coccoliths during the middle Albian–Cenomanian. The size and ellipticity changes during OAE 1a and 1b were the strongest, likely resulting from ocean acidification and trace metal inputs, in addition to (or independently of) fertility and temperature variations. |
author2 |
Bettoni, Chiara Erba, Elisabetta Castiglione, Silvia Raia, Pasquale Bottini, Cinzia |
format |
Article in Journal/Newspaper |
author |
Bettoni, Chiara Erba, Elisabetta Castiglione, Silvia Raia, Pasquale Bottini, Cinzia |
spellingShingle |
Bettoni, Chiara Erba, Elisabetta Castiglione, Silvia Raia, Pasquale Bottini, Cinzia Morphometric changes in Watznaueria barnesiae across the mid Cretaceous: Paleoecological implications |
author_facet |
Bettoni, Chiara Erba, Elisabetta Castiglione, Silvia Raia, Pasquale Bottini, Cinzia |
author_sort |
Bettoni, Chiara |
title |
Morphometric changes in Watznaueria barnesiae across the mid Cretaceous: Paleoecological implications |
title_short |
Morphometric changes in Watznaueria barnesiae across the mid Cretaceous: Paleoecological implications |
title_full |
Morphometric changes in Watznaueria barnesiae across the mid Cretaceous: Paleoecological implications |
title_fullStr |
Morphometric changes in Watznaueria barnesiae across the mid Cretaceous: Paleoecological implications |
title_full_unstemmed |
Morphometric changes in Watznaueria barnesiae across the mid Cretaceous: Paleoecological implications |
title_sort |
morphometric changes in watznaueria barnesiae across the mid cretaceous: paleoecological implications |
publishDate |
2024 |
url |
https://hdl.handle.net/11588/952635 https://www.sciencedirect.com/science/article/pii/S0377839824000136 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_relation |
volume:188 firstpage:102343 journal:MARINE MICROPALEONTOLOGY https://hdl.handle.net/11588/952635 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85183948850 https://www.sciencedirect.com/science/article/pii/S0377839824000136 |
_version_ |
1802648661776138240 |