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Controles oceanográficos sobre la diversidad y la extinción del plancton foraminifero
Shanan E Peters1, Daniel C Kelly, Andrew J Fraass
1Department of Geoscience, University of Wisconsin, Madison, Wisconsin 53706, USA. peters@geology.wisc.edu
Nature
|January 11, 2013
Resumen
La Tierra La Tierra La Tierra La Tierra La Tierra
Área de la Ciencia:
- Ciencias de la Tierra Ciencias de la Tierra Ciencias de la Tierra
- Paleontología Paleontología.
- Oceanografía La oceanografía es la oceanografía.
Sus antecedentes:
- La evolución biológica a largo plazo está influenciada por los cambios ambientales, particularmente las extinciones masivas.
- La interacción entre los factores físicos y las interacciones biológicas en la evolución sigue sin estar clara.
Objetivo del estudio:
- Investigar el vínculo entre los cambios tectónicos y climáticos y la evolución del plancton foraminifero.
- Determinar los impulsores de las tasas de extinción y origen a lo largo del tiempo geológico.
Principales métodos:
- Análisis de datos macrostratigráficos de la cuenca del Océano Atlántico.
- Examen de la diversidad de especies y las tasas de extinción de foraminíferos planctónicos desde el Jurásico hasta la actualidad.
- Correlación de los datos evolutivos con los cambios tectónicos y climáticos.
Principales resultados:
- La diversidad mundial de especies y las tasas de extinción de foraminíferos planctónicos se correlacionan con los cambios oceánicos impulsados tectónicamente y climáticamente.
- Los eventos ambientales transitorios, como la extinción Cretácico-Paleógeno y la transición Eoceno-Oligoceno, se superponen a esta tendencia a largo plazo.
- Las tasas de origen de las especies no muestran correlación con las cantidades macrostratigráficas.
Conclusiones:
- Los cambios fisicoquímicos del océano y la atmósfera impulsan principalmente los eventos de extinción sincrónica.
- El origen evolutivo está vinculado a complejas interacciones biológicas y ambientales a largo plazo.
- La comprensión de estos vínculos es crucial para la ciencia de la Tierra y la predicción de futuros patrones evolutivos.
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