Evidence of Stable Foraminifera Biomineralization during the Last Two Climate Cycles in the Tropical Atlantic Ocean
Planktonic foraminiferal biomineralization intensity, reflected by the weight of their shell calcite mass, affects global carbonate deposition and is known to follow climatic cycles by being increased during glacial stages and decreased during interglacial stages. Here, we measure the dissolution st...
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MDPI AG
2020-09-01
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| Series: | Journal of Marine Science and Engineering |
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| Online Access: | https://www.mdpi.com/2077-1312/8/10/737 |
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| author | Stergios D. Zarkogiannis Assimina Antonarakou Vincent Fernandez P. Graham Mortyn George Kontakiotis Hara Drinia Mervyn Greaves |
| author_facet | Stergios D. Zarkogiannis Assimina Antonarakou Vincent Fernandez P. Graham Mortyn George Kontakiotis Hara Drinia Mervyn Greaves |
| author_sort | Stergios D. Zarkogiannis |
| collection | DOAJ |
| description | Planktonic foraminiferal biomineralization intensity, reflected by the weight of their shell calcite mass, affects global carbonate deposition and is known to follow climatic cycles by being increased during glacial stages and decreased during interglacial stages. Here, we measure the dissolution state and the mass of the shells of the planktonic foraminifera species <i>Globigerina bulloides</i> from a Tropical Eastern North Atlantic site over the last two glacial–interglacial climatic transitions, and we report no major changes in plankton calcite production with the atmospheric <i>p</i>CO<sub>2</sub> variations. We attribute this consistency in foraminifera calcification to the climatic and hydrological stability of the tropical regions. However, we recorded increased shell masses midway through the penultimate deglaciation (Termination II). In order to elucidate the cause of the increased shell weights, we performed <i>δ</i><sup>18</sup>O, Mg/Ca, and μCT measurements on the same shells from a number of samples surrounding this event. Compared with the lighter ones, we find that the foraminifera of increased weight are internally contaminated by sediment infilling and that their shell masses respond to local surface seawater density changes. |
| first_indexed | 2024-03-10T16:05:44Z |
| format | Article |
| id | doaj.art-7c9ae702318d440487fc1a58150b6609 |
| institution | Directory Open Access Journal |
| issn | 2077-1312 |
| language | English |
| last_indexed | 2024-03-10T16:05:44Z |
| publishDate | 2020-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Journal of Marine Science and Engineering |
| spelling | doaj.art-7c9ae702318d440487fc1a58150b66092023-11-20T14:54:17ZengMDPI AGJournal of Marine Science and Engineering2077-13122020-09-0181073710.3390/jmse8100737Evidence of Stable Foraminifera Biomineralization during the Last Two Climate Cycles in the Tropical Atlantic OceanStergios D. Zarkogiannis0Assimina Antonarakou1Vincent Fernandez2P. Graham Mortyn3George Kontakiotis4Hara Drinia5Mervyn Greaves6Department of Historical Geology-Paleontology, Faculty of Geology & Geoenvironment, School of Earth Sciences, National & Kapodistrian University of Athens, Zografou University Hill, 157 84 Athens, GreeceDepartment of Historical Geology-Paleontology, Faculty of Geology & Geoenvironment, School of Earth Sciences, National & Kapodistrian University of Athens, Zografou University Hill, 157 84 Athens, GreeceImaging and Analysis Centre, Natural History Museum, London SW7 5BD, UKInstitute of Environmental Science and Technology (ICTA), Universitat Autònoma de Barcelona, 08193 Barcelona, SpainDepartment of Historical Geology-Paleontology, Faculty of Geology & Geoenvironment, School of Earth Sciences, National & Kapodistrian University of Athens, Zografou University Hill, 157 84 Athens, GreeceDepartment of Historical Geology-Paleontology, Faculty of Geology & Geoenvironment, School of Earth Sciences, National & Kapodistrian University of Athens, Zografou University Hill, 157 84 Athens, GreeceDepartment of Earth Sciences, University of Cambridge, Cambridge CB2 3EQ, UKPlanktonic foraminiferal biomineralization intensity, reflected by the weight of their shell calcite mass, affects global carbonate deposition and is known to follow climatic cycles by being increased during glacial stages and decreased during interglacial stages. Here, we measure the dissolution state and the mass of the shells of the planktonic foraminifera species <i>Globigerina bulloides</i> from a Tropical Eastern North Atlantic site over the last two glacial–interglacial climatic transitions, and we report no major changes in plankton calcite production with the atmospheric <i>p</i>CO<sub>2</sub> variations. We attribute this consistency in foraminifera calcification to the climatic and hydrological stability of the tropical regions. However, we recorded increased shell masses midway through the penultimate deglaciation (Termination II). In order to elucidate the cause of the increased shell weights, we performed <i>δ</i><sup>18</sup>O, Mg/Ca, and μCT measurements on the same shells from a number of samples surrounding this event. Compared with the lighter ones, we find that the foraminifera of increased weight are internally contaminated by sediment infilling and that their shell masses respond to local surface seawater density changes.https://www.mdpi.com/2077-1312/8/10/737planktonic foraminiferashell weightclimate variabilitysea surface densitycarbonate productionX-ray microscopy (μCT) |
| spellingShingle | Stergios D. Zarkogiannis Assimina Antonarakou Vincent Fernandez P. Graham Mortyn George Kontakiotis Hara Drinia Mervyn Greaves Evidence of Stable Foraminifera Biomineralization during the Last Two Climate Cycles in the Tropical Atlantic Ocean Journal of Marine Science and Engineering planktonic foraminifera shell weight climate variability sea surface density carbonate production X-ray microscopy (μCT) |
| title | Evidence of Stable Foraminifera Biomineralization during the Last Two Climate Cycles in the Tropical Atlantic Ocean |
| title_full | Evidence of Stable Foraminifera Biomineralization during the Last Two Climate Cycles in the Tropical Atlantic Ocean |
| title_fullStr | Evidence of Stable Foraminifera Biomineralization during the Last Two Climate Cycles in the Tropical Atlantic Ocean |
| title_full_unstemmed | Evidence of Stable Foraminifera Biomineralization during the Last Two Climate Cycles in the Tropical Atlantic Ocean |
| title_short | Evidence of Stable Foraminifera Biomineralization during the Last Two Climate Cycles in the Tropical Atlantic Ocean |
| title_sort | evidence of stable foraminifera biomineralization during the last two climate cycles in the tropical atlantic ocean |
| topic | planktonic foraminifera shell weight climate variability sea surface density carbonate production X-ray microscopy (μCT) |
| url | https://www.mdpi.com/2077-1312/8/10/737 |
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