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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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...
