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Slater SM, Bown P, Twitchett RJ, Danise S, Vajda V. Global record of "ghost" nannofossils reveals plankton resilience to high CO 2 and warming. Science 2022; 376:853-856. [PMID: 35587965 DOI: 10.1126/science.abm7330] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
Predictions of how marine calcifying organisms will respond to climate change rely heavily on the fossil record of nannoplankton. Declines in calcium carbonate (CaCO3) and nannofossil abundance through several past global warming events have been interpreted as biocalcification crises caused by ocean acidification and related factors. We present a global record of imprint-or "ghost"-nannofossils that contradicts this view, revealing exquisitely preserved nannoplankton throughout an inferred Jurassic biocalcification crisis. Imprints from two further Cretaceous warming events confirm that the fossil records of these intervals have been strongly distorted by CaCO3 dissolution. Although the rapidity of present-day climate change exceeds the temporal resolution of most fossil records, complicating direct comparison with past warming events, our findings demonstrate that nannoplankton were more resilient to past events than traditional fossil evidence suggests.
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Affiliation(s)
- Sam M Slater
- Department of Palaeobiology, Swedish Museum of Natural History, SE-104 05 Stockholm, Sweden
| | - Paul Bown
- Department of Earth Sciences, University College London, London WC1E 6BT, UK
| | - Richard J Twitchett
- Department of Earth Sciences, The Natural History Museum, London SW7 5BD, UK
| | - Silvia Danise
- Dipartimento di Scienze della Terra, Università degli Studi di Firenze, Via La Pira 4, 50121 Firenze, Italy
| | - Vivi Vajda
- Department of Palaeobiology, Swedish Museum of Natural History, SE-104 05 Stockholm, Sweden
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Bolton CT, Hernández-Sánchez MT, Fuertes MÁ, González-Lemos S, Abrevaya L, Mendez-Vicente A, Flores JA, Probert I, Giosan L, Johnson J, Stoll HM. Decrease in coccolithophore calcification and CO2 since the middle Miocene. Nat Commun 2016; 7:10284. [PMID: 26762469 PMCID: PMC4735581 DOI: 10.1038/ncomms10284] [Citation(s) in RCA: 116] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2015] [Accepted: 11/26/2015] [Indexed: 12/11/2022] Open
Abstract
Marine algae are instrumental in carbon cycling and atmospheric carbon dioxide (CO2) regulation. One group, coccolithophores, uses carbon to photosynthesize and to calcify, covering their cells with chalk platelets (coccoliths). How ocean acidification influences coccolithophore calcification is strongly debated, and the effects of carbonate chemistry changes in the geological past are poorly understood. This paper relates degree of coccolith calcification to cellular calcification, and presents the first records of size-normalized coccolith thickness spanning the last 14 Myr from tropical oceans. Degree of calcification was highest in the low-pH, high-CO2 Miocene ocean, but decreased significantly between 6 and 4 Myr ago. Based on this and concurrent trends in a new alkenone ɛp record, we propose that decreasing CO2 partly drove the observed trend via reduced cellular bicarbonate allocation to calcification. This trend reversed in the late Pleistocene despite low CO2, suggesting an additional regulator of calcification such as alkalinity.
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Affiliation(s)
- Clara T. Bolton
- Geology Department, Oviedo University, Arias de Velasco s/n, 33005 Oviedo, Asturias, Spain
- Aix-Marseille University, CNRS, IRD, CEREGE UM34, 13545 Aix en Provence, France
| | | | - Miguel-Ángel Fuertes
- Grupo de Geociencias Oceánicas, Geology Department, University of Salamanca, Salamanca 37008, Spain
| | - Saúl González-Lemos
- Geology Department, Oviedo University, Arias de Velasco s/n, 33005 Oviedo, Asturias, Spain
| | - Lorena Abrevaya
- Geology Department, Oviedo University, Arias de Velasco s/n, 33005 Oviedo, Asturias, Spain
| | - Ana Mendez-Vicente
- Geology Department, Oviedo University, Arias de Velasco s/n, 33005 Oviedo, Asturias, Spain
| | - José-Abel Flores
- Grupo de Geociencias Oceánicas, Geology Department, University of Salamanca, Salamanca 37008, Spain
| | - Ian Probert
- CNRS, Sorbonne Universités-Université Pierre et Marie Curie (UPMC) Paris 06, FR2424, Roscoff Culture Collection, Station Biologique de Roscoff, Place Georges Teissier, 29680 Roscoff, France
| | - Liviu Giosan
- Department of Geology and Geophysics, Woods Hole Oceanographic Institution, 266 Woods Hole Road, MS# 22, Woods Hole, Massachusetts 02543-1050, USA
| | - Joel Johnson
- University of New Hampshire, Department of Earth Sciences, 56 College Road, James Hall, Durham, New Hampshire 03824-3589, USA
| | - Heather M. Stoll
- Geology Department, Oviedo University, Arias de Velasco s/n, 33005 Oviedo, Asturias, Spain
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Honisch B, Ridgwell A, Schmidt DN, Thomas E, Gibbs SJ, Sluijs A, Zeebe R, Kump L, Martindale RC, Greene SE, Kiessling W, Ries J, Zachos JC, Royer DL, Barker S, Marchitto TM, Moyer R, Pelejero C, Ziveri P, Foster GL, Williams B. The Geological Record of Ocean Acidification. Science 2012; 335:1058-63. [DOI: 10.1126/science.1208277] [Citation(s) in RCA: 672] [Impact Index Per Article: 56.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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Erba E, Bottini C, Weissert HJ, Keller CE. Response to Comment on “Calcareous Nannoplankton Response to Surface-Water Acidification Around Oceanic Anoxic Event 1a”. Science 2011. [DOI: 10.1126/science.1199608] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
Gibbs
et al
. question our reconstruction of surface- and deepwater acidification around Oceanic Anoxic Event 1a. We answer their criticisms to better substantiate our arguments and original conclusions. Contrary to their suggestion, preservation cannot explain the nannofossil changes we documented, which trace perturbations in the photic zone, including a substantial increase in partial pressure of CO
2
(
p
CO
2
) and an inferred decreased pH as derived from geochemical proxies.
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Affiliation(s)
- Elisabetta Erba
- Dipartimento di Scienze della Terra “Ardito Desio,” Università degli Studi di Milano, via Mangiagalli 34, 20133 Milano, Italy
| | - Cinzia Bottini
- Dipartimento di Scienze della Terra “Ardito Desio,” Università degli Studi di Milano, via Mangiagalli 34, 20133 Milano, Italy
| | - Helmut J. Weissert
- Department of Earth Sciences, Geology, ETH-Zentrum, Sonneggstrasse 5, CH-8092 Zürich, Switzerland
| | - Christina E. Keller
- Department of Earth Sciences, Geology, ETH-Zentrum, Sonneggstrasse 5, CH-8092 Zürich, Switzerland
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