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Using Phylogenetic Analysis to Investigate Eukaryotic Gene Origin
Published on: August 14, 2018
Asimetría de los linajes y la dirección del tiempo evolutivo
Science (New York, N.Y.)
|June 12, 1987
Resumen
La historia evolutiva muestra una dirección distinta, con grupos que típicamente se diversifican más en sus primeras etapas. Este patrón de clados "pesados en el fondo" es consistente en diferentes formas de vida y entornos.
Área de la Ciencia:
- Paleobiología Paleobiología.
- Biología evolutiva Biología evolutiva.
- La macroevolución es la macroevolución.
Sus antecedentes:
- La historia evolutiva de la vida muestra patrones que sugieren direccionalidad.
- Las nociones anteriores de
- El progreso de los avances está avanzando.
- en la evolución se consideran vagas y culturalmente sesgadas.
- El análisis cuantitativo puede revelar patrones objetivos en el tiempo evolutivo.
Objetivo del estudio:
- Para demostrar la naturaleza direccional del tiempo evolutivo utilizando la diversidad de clado.
- Sustituir los conceptos subjetivos del progreso evolutivo por datos cuantitativos.
- Fomentar una mayor investigación sobre la direccionalidad de la historia de la vida.
Principales métodos:
- Análisis de diagramas de diversidad de clado de muestras estadísticas grandes.
- Examen de la asimetría en los patrones de diversidad en los grupos evolutivos.
- Comparación de patrones en diferentes niveles taxonómicos, incluyendo invertebrados marinos y mamíferos terrestres.
Principales resultados:
- Los diagramas de diversidad de clado muestran una asimetría consistente.
- Los grupos evolutivos tienden a concentrar la diversidad temprano en su historia.
- Esto Esto Esto Esto Esto Esto Esto
- pesado en el fondo.
- El patrón de clado se observa en diversos taxones y entornos.
Conclusiones:
- El tiempo evolutivo posee una direccionalidad medible.
- Los estudios cuantitativos de la direccionalidad evolutiva son cruciales para la paleobiología.
- Los hallazgos apoyan una comprensión basada en datos de la trayectoria histórica de la vida.
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