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Los moluscos de inmersión en frío son más antiguos que la fauna general de moluscos marinos
Steffen Kiel1, Crispin T S Little
1School of Earth and Environment, University of Leeds, Leeds LS2 9JT, UK. steffen.kiel@gmx.de
Science (New York, N.Y.)
|September 9, 2006
Resumen
Los registros fósiles de moluscos revelan que las faunas de aguas profundas tienen orígenes antiguos, similares a otras formas de vida de aguas profundas. Estos hallazgos desafían las teorías que vinculan la evolución de las filtraciones con los eventos anóxicos globales.
Área de la Ciencia:
- Biología marina Biología marina.
- Paleontología Paleontología.
- Geología Geología Geología.
Sus antecedentes:
- Los orígenes evolutivos y la edad de las faunas de ventilación y filtración de aguas profundas siguen siendo objeto de debate desde su descubrimiento.
- La comprensión de estas faunas es crucial para la ecología de aguas profundas y los estudios evolutivos.
Objetivo del estudio:
- Para investigar la edad geológica y la historia evolutiva de las faunas de moluscos filtrados.
- Para comparar los patrones evolutivos de las faunas de filtración con los taxones marinos y de aguas profundas en general.
- Para probar la hipótesis de que los eventos anóxicos de aguas profundas influyeron en la evolución de la fauna que se filtra.
Principales métodos:
- Análisis del registro fósil de los moluscos de filtración.
- Comparación de los rangos geológicos de los géneros seep con los moluscos marinos generales y otros taxones de aguas profundas.
- Evaluación del impacto de los eventos anóxicos/disoxicos de aguas profundas en la fauna de las filtraciones.
Principales resultados:
- Los géneros de seep vivos exhiben rangos geológicos significativamente más largos que los moluscos marinos generales.
- Los rangos geológicos de los géneros seep son comparables a los de otros taxones de aguas profundas.
- Las faunas de filtración no muestran evidencia de un impacto significativo de los eventos anóxicos / disoxicos de aguas profundas.
Conclusiones:
- Es probable que las faunas de filtración de aguas profundas compartan factores evolutivos con otras formas de vida de aguas profundas.
- La evolución de las faunas de filtración no está demostradamente vinculada a eventos anóxicos de aguas profundas.
- La naturaleza anóxica propuesta y / o la extensión global de eventos anóxicos pasados pueden necesitar una reevaluación.
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