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La temperatura controla el ciclo del carbono y la evolución biológica en la zona crepuscular del océano
Flavia Boscolo-Galazzo1, Katherine A Crichton2, Andy Ridgwell3
1School of Earth and Environmental Sciences, Cardiff University, Cardiff, UK. flavia.boscologalazzo@uib.no.
Science (New York, N.Y.)
|March 12, 2021
Resumen
El enfriamiento del océano mejoró la bomba de carbono biológica al ralentizar la degradación de la materia orgánica. Esto aumentó el suministro de alimentos a las profundidades del mar, impulsando la evolución del plancton y expandiendo el ecosistema de la zona crepuscular.
Área de la Ciencia:
- Paleoceanografía
- Biología marina
- Ciclos biogeoquímicos
Sus antecedentes:
- La bomba biológica de carbono del océano transfiere materia orgánica a las profundidades del mar.
- La temperatura influye en procesos clave como la fotosíntesis y la respiración, afectando la eficiencia de la bomba.
Objetivo del estudio:
- Investigar las tasas de reciclaje de carbono y nutrientes en los últimos 15 millones de años.
- Determinar el impacto del enfriamiento global en la eficiencia de la bomba de carbono biológica.
Principales métodos:
- Enfoque combinado de modelado de datos.
- Análisis de las condiciones oceánicas globales durante 15 millones de años.
Principales resultados:
- La eficiencia de la bomba de carbono biológica aumentó con el enfriamiento de los océanos.
- Se observaron tasas reducidas de remineralización de la materia orgánica que se hunde.
- Se produjo un aumento en el suministro de alimentos a las profundidades del océano.
Conclusiones:
- El enfriamiento del océano mejora la bomba de carbono biológica.
- Los ecosistemas de aguas profundas, incluida la zona mesopelágica, se expandieron debido al aumento de la disponibilidad de alimentos.
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