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Paleoceanografía del Océano Pacífico tropical del este
Science (New York, N.Y.)
|January 10, 1992
Resumen
La Barrera del Pacífico Oriental (EPB, por sus siglas en inglés) aísla efectivamente las especies marinas hoy en día. Sin embargo, la evidencia fósil indica que esta barrera fue menos efectiva en el pasado debido a la diferente circulación oceánica y las masas terrestres del Pacífico que ayudaron a la dispersión.
Área de la Ciencia:
- Biología Marina Biología Marina.
- Paleontología Paleontología.
- Oceanografía La oceanografía es la oceanografía.
Sus antecedentes:
- La Barrera del Pacífico Este (EPB, por sus siglas en inglés) es una importante frontera biogeográfica marina.
- Comprender los patrones históricos de dispersión es crucial para la conservación marina.
Objetivo del estudio:
- Investigar la efectividad histórica de la Barrera del Pacífico Oriental para limitar la dispersión de las especies marinas.
- Para reconstruir el pasado de la circulación del Océano Pacífico y la geografía que influye en el intercambio de fauna.
Principales métodos:
- Análisis del registro fósil de los corales del Pacífico oriental.
- Reconstrucciones paleogeográficas del Océano Pacífico.
Principales resultados:
- El EPB ha sido la barrera marina más efectiva para la dispersión de la fauna tropical de aguas poco profundas en la actualidad.
- En el Cretácico, la EPB fue menos efectiva, con una circulación ecuatorial de este a oeste y atolones oceánicos que facilitaron la dispersión.
- Durante el Mesozoico y el Paleozoico tardío, los terrenos del Pacífico central actuaron como escalones de dispersión a través de un Panthalassa más amplio.
Conclusiones:
- La efectividad de la Barrera del Pacífico Oriental ha variado significativamente a lo largo de la historia de la Tierra.
- Las condiciones oceánicas y geográficas pasadas alteraron fundamentalmente las rutas de dispersión marina en el Pacífico.
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