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Comentario a "Temperaturas letales durante el invernadero del Triásico Temprano"
N Goudemand1, C Romano, A Brayard
1Palaeontological Institute and Museum, University of Zurich, Zurich, Switzerland. goudemand@pim.uzh.ch
Science (New York, N.Y.)
|March 2, 2013
Resumen
Revisando las temperaturas del agua de mar del Permiano al Triásico Medio, este estudio encontró que los datos corregidos ya no respaldan las afirmaciones anteriores de condiciones "muy calientes" que causan "eclipses" de organismos. Los hallazgos desafían las interpretaciones paleoclimáticas establecidas.
Área de la Ciencia:
- Paleoclimatología Paleoclimatología
- Biología Marina Biología Marina.
- Escalas de tiempo geológico Escalas de tiempo geológico
Sus antecedentes:
- Investigaciones previas realizadas por Sun et al. sugirió una correlación entre las altas temperaturas del agua de mar del Pérmico-Triásico y las extinciones de organismos.
- El estudio original proponía una línea ecuatorial.
Objetivo del estudio:
- Reevaluar el posicionamiento temporal y la interpretación de los datos de temperatura del agua de mar ecuatorial del Permiano al Triásico Medio.
- Evaluar la validez de la relación entre las temperaturas reconstruidas y el organismo propuesto.
Principales métodos:
- Corrección del posicionamiento temporal para los puntos de datos de paleotemperatura existentes.
- Reanálisis de las tendencias de temperatura y su relación con los eventos biológicos.
Principales resultados:
- Los puntos de datos corregidos no respaldan las tendencias de temperatura previamente asumidas.
- La relación directa propuesta entre el agua de mar "mortalmente caliente" y el "eclipse" de organismos no está sustentada por los datos reanalizados.
Conclusiones:
- La interpretación original del estrés térmico del Pérmico-Triásico sobre la vida marina ecuatorial no está respaldada por los datos corregidos.
- Se necesita más investigación para comprender los impulsores de los cambios biológicos del Pérmico-Triásico.
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