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La evolución del fitoplancton eucariótico moderno
Paul G Falkowski1, Miriam E Katz, Andrew H Knoll
1Institute of Marine and Coastal Sciences, Rutgers University, 71 Dudley Road, New Brunswick, NJ 08540, USA. falko@imcs.rutgers.edu
Science (New York, N.Y.)
|July 17, 2004
Resumen
Los ecosistemas marinos dependen del fitoplancton eucariota para su estructura y función. La Era Mesozoica vio el surgimiento de dinoflagelados, cocolitóforos y diatomeas, cruciales para el flujo de materia orgánica del océano.
Área de la Ciencia:
- Biología Marina Biología Marina.
- Paleontología Paleontología.
- Oceanografía La oceanografía es la oceanografía.
Sus antecedentes:
- El fitoplancton eucariota es vital para la estructura del ecosistema marino y la función ecológica.
- A pesar de ser numéricamente inferiores a las cianobacterias, impulsan un flujo significativo de materia orgánica.
- El surgimiento de los tres principales grupos de fitoplancton (dinoflagelados, cocolitóforos, diatomeas) ocurrió durante la Era Mesozoica.
Objetivo del estudio:
- Investigar los factores geológicos, geoquímicos y biológicos detrás del surgimiento ecológico de los dinoflagelados, cocolitóforos y diatomeas.
- Comprender el significado evolutivo de la simbiosis secundaria en estos grupos clave de fitoplancton.
Principales métodos:
- Revisión de los registros geológicos.
- Análisis de las proxies geoquímicas.
- Examen de las vías evolutivas biológicas.
Principales resultados:
- La Era Mesozoica fue un período crítico para la diversificación y el dominio ecológico de grupos clave de fitoplancton.
- La simbiosis secundaria, originada en una alga roja ancestral, es una característica compartida de estos clados dominantes.
- Estos grupos de fitoplancton influyeron significativamente en la biogeoquímica del océano y las redes alimentarias.
Conclusiones:
- El surgimiento de los dinoflagelados, cocolitóforos y diatomeas dio forma fundamentalmente a los ecosistemas marinos modernos.
- Comprender su historia evolutiva es clave para comprender la productividad oceánica y el ciclo del carbono.
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