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Un lagerstätte fósil del Mesozoico de hace 250,8 millones de años muestra un ecosistema marino de tipo moderno
Xu Dai1,2, Joshua H F L Davies3, Zhiwei Yuan1
1State Key Laboratory of Biogeology and Environmental Geology, School of Earth Sciences, China University of Geosciences, Wuhan 430074, China.
Science (New York, N.Y.)
|February 9, 2023
Resumen
La Biota de Guiyang, un lugar de almacenamiento de fósiles del Triásico Temprano, revela una rápida recuperación del ecosistema marino poco más de un millón de años después de la extinción masiva del Permiano-Triásico. Este descubrimiento muestra el lagerstätte mesozoico más antiguo, destacando la biodiversidad marina temprana.
Área de la Ciencia:
- Paleontología
- Biología marina
- Geocronología
Sus antecedentes:
- Los lagerstieten fósiles son vitales para comprender la historia de la evolución.
- El período Triásico Temprano siguió al evento de extinción masiva más grave en la historia de la Tierra.
- Los ecosistemas marinos experimentaron una profunda perturbación y posterior recuperación.
Objetivo del estudio:
- Para informar sobre el descubrimiento de un nuevo conjunto de fósiles del Triásico Temprano excepcionalmente conservado.
- Datar con precisión este conjunto y determinar su posición relativa a la extinción masiva del Pérmico-Triásico.
- Analizar la biodiversidad y la complejidad ecológica del ecosistema marino recuperado.
Principales métodos:
- Datación de uranio y plomo de alta precisión del conjunto fósil.
- Análisis paleontológico sistemático de la fauna conservada.
- Análisis estratigráfico de la formación portadora de fósiles.
Principales resultados:
- Descubrimiento de la Biota de Guiyang, un lagerstätte del Triásico Temprano en el sur de China.
- Datando el ensamblaje a hace 250.83 millones de años, aproximadamente 1.08 millones de años después de la extinción.
- Identificación de al menos 12 clases y 19 órdenes, incluidos diversos peces y malacostracans, lo que indica un ecosistema complejo.
Conclusiones:
- El Biota de Guiyang es el lagerstätte mesozoico más antiguo conocido.
- Demuestra una recuperación y diversificación excepcionalmente rápidas de la vida marina después de la extinción masiva del Pérmico-Triásico.
- Este conjunto proporciona información crítica sobre el establecimiento de ecosistemas marinos de tipo moderno.
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