Articles | Volume 45, issue 1
https://doi.org/10.5194/jm-45-1-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/jm-45-1-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
06 Jan 2026
Research article |
| 06 Jan 2026
| 06 Jan 2026
Tropical ecosystem shifts at the Eocene–Oligocene transition in the southwestern Caribbean region
Raúl Trejos-Tamayo
CORRESPONDING AUTHOR
Instituto de Investigaciones en Estratigrafía (IIES), Universidad de Caldas, Manizales, 170004, Colombia
Departamento de Geología, Universidad de Salamanca, Salamanca, 37008, Spain
Darwin Garzón
Instituto de Investigaciones en Estratigrafía (IIES), Universidad de Caldas, Manizales, 170004, Colombia
Diana Ochoa
Departamento de Geología, Universidad de Salamanca, Salamanca, 37008, Spain
Angelo Plata-Torres
Instituto de Investigaciones en Estratigrafía (IIES), Universidad de Caldas, Manizales, 170004, Colombia
Smithsonian Tropical Research Institute, Panamá City, 0843-03092, Panamá
Fabrizio Frontalini
Dipartimento di Scienze Pure e Applicate, Università degli Studi di Urbino “Carlo Bo,”, Urbino, 61029, Italy
Felipe Vallejo-Hincapié
Instituto de Investigaciones en Estratigrafía (IIES), Universidad de Caldas, Manizales, 170004, Colombia
Fátima Abrantes
Centro de Ciências do Mar (CCMAR,), Universidade do Algarve, Faro, 8005-139, Portugal
Divisão de Geologia e Georecursos Marinhos, Instituto Português do Mar e da Atmosfera (IPMA), Algés, 1495-165, Portugal
Vitor Magalhães
Divisão de Geologia e Georecursos Marinhos, Instituto Português do Mar e da Atmosfera (IPMA), Algés, 1495-165, Portugal
Viviana Arias-Villegas
Instituto de Investigaciones en Estratigrafía (IIES), Universidad de Caldas, Manizales, 170004, Colombia
Carlos Jaramillo
Smithsonian Tropical Research Institute, Panamá City, 0843-03092, Panamá
Jaime Escobar
Departamento de Ingeniería Civil y Ambiental, Universidad del Norte, Barranquilla, Colombia
Jason H. Curtis
Department of Geological Sciences, University of Florida, Gainesville, FL, 32611, USA
José-Abel Flores
Departamento de Geología, Universidad de Salamanca, Salamanca, 37008, Spain
Constanza Osorio-Tabares
Instituto de Investigaciones en Estratigrafía (IIES), Universidad de Caldas, Manizales, 170004, Colombia
Mónica Duque-Castaño
Centro de Ciências do Mar (CCMAR,), Universidade do Algarve, Faro, 8005-139, Portugal
Divisão de Geologia e Georecursos Marinhos, Instituto Português do Mar e da Atmosfera (IPMA), Algés, 1495-165, Portugal
Universidade do Algarve, Campus de Gambelas, Faro, 8005-139, Portugal
Erika Bedoya
Centro Austral de Investigaciones Científicas CADIC-CONICET, Bernardo Houssay 200, Ushuaia, Tierra del Fuego, Argentina
Andrés Pardo-Trujillo
Instituto de Investigaciones en Estratigrafía (IIES), Universidad de Caldas, Manizales, 170004, Colombia
Departamento de Ciencias Geológicas, Universidad de Caldas, Manizales, 170004, Colombia
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João M. F. Ramos, Jairo F. Savian, Daniel R. Franco, Milene F. Figueiredo, Rodolfo Coccioni, and Fabrizio Frontalini
Clim. Past, 22, 357–375, https://doi.org/10.5194/cp-22-357-2026, https://doi.org/10.5194/cp-22-357-2026, 2026
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Biogeosciences, 22, 7205–7232, https://doi.org/10.5194/bg-22-7205-2025, https://doi.org/10.5194/bg-22-7205-2025, 2025
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We studied the abundance and composition of key phytoplankton groups in the Drake Passage and Antarctic Peninsula before and during a marine heatwave in summer 2020. An anticyclonic eddy transported warmer waters into the southern Drake Passage. This led to higher diatom abundance and an increase in the abundance of a small diatom species in the southern Drake Passage while reducing coccolithophore populations. The consequences on marine ecosystems and biogeochemical cycles remain uncertain.
Sandra Domingues Gomes, William Fletcher, Abi Stone, Teresa Rodrigues, Andreia Rebotim, Dulce Oliveira, Maria Sánchez Goñi, Fátima Abrantes, and Filipa Naughton
Biogeosciences, 22, 6631–6650, https://doi.org/10.5194/bg-22-6631-2025, https://doi.org/10.5194/bg-22-6631-2025, 2025
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J. Micropalaeontol., 44, 415–430, https://doi.org/10.5194/jm-44-415-2025, https://doi.org/10.5194/jm-44-415-2025, 2025
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Vincent M. P. Bouchet, Silvia Helena de Mello e Sousa, Carla Bonetti, Leticia Burone, Pierre Belart, Wania Duleba, Fabio Francescangeli, Fabrizio Frontalini, Lazaro Laut, Débora S. Raposo, André R. Rodrigues, Sibelle Trevisan Disaró, Daniel Vicente Pupo, Fabrício Leandro Damasceno, Jean-Charles Pavard, and Maria Virgínia Alves Martins
J. Micropalaeontol., 44, 237–261, https://doi.org/10.5194/jm-44-237-2025, https://doi.org/10.5194/jm-44-237-2025, 2025
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J. Micropalaeontol., 44, 145–168, https://doi.org/10.5194/jm-44-145-2025, https://doi.org/10.5194/jm-44-145-2025, 2025
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Thibauld M. Béjard, Andrés S. Rigual-Hernández, Javier P. Tarruella, José-Abel Flores, Anna Sanchez-Vidal, Irene Llamas-Cano, and Francisco J. Sierro
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Rodrigo Martínez-Abarca, Michelle Abstein, Frederik Schenk, David Hodell, Philipp Hoelzmann, Mark Brenner, Steffen Kutterolf, Sergio Cohuo, Laura Macario-González, Mona Stockhecke, Jason Curtis, Flavio S. Anselmetti, Daniel Ariztegui, Thomas Guilderson, Alexander Correa-Metrio, Thorsten Bauersachs, Liseth Pérez, and Antje Schwalb
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Thibauld M. Béjard, Andrés S. Rigual-Hernández, José A. Flores, Javier P. Tarruella, Xavier Durrieu de Madron, Isabel Cacho, Neghar Haghipour, Aidan Hunter, and Francisco J. Sierro
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Molly O. Patterson, Richard H. Levy, Denise K. Kulhanek, Tina van de Flierdt, Huw Horgan, Gavin B. Dunbar, Timothy R. Naish, Jeanine Ash, Alex Pyne, Darcy Mandeno, Paul Winberry, David M. Harwood, Fabio Florindo, Francisco J. Jimenez-Espejo, Andreas Läufer, Kyu-Cheul Yoo, Osamu Seki, Paolo Stocchi, Johann P. Klages, Jae Il Lee, Florence Colleoni, Yusuke Suganuma, Edward Gasson, Christian Ohneiser, José-Abel Flores, David Try, Rachel Kirkman, Daleen Koch, and the SWAIS 2C Science Team
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How much of the West Antarctic Ice Sheet will melt and how quickly it will happen when average global temperatures exceed 2 °C is currently unknown. Given the far-reaching and international consequences of Antarctica’s future contribution to global sea level rise, the SWAIS 2C Project was developed in order to better forecast the size and timing of future changes.
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Short summary
Our study investigates how tropical marine ecosystems responded to climate change during the Eocene–Oligocene transition (~34 Ma). Based on microfossil and geochemical data from a Caribbean drill core, we identify enhanced terrigenous input, increased surface productivity, changes in carbonate preservation, and reduced deep-water oxygenation. Likely driven by global cooling and sea-level fall, these shifts offer new insights into low-latitude paleoenvironmental change.
Our study investigates how tropical marine ecosystems responded to climate change during the...
