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Herbívoros en los corales blandos asimbióticos
Science (New York, N.Y.)
|April 7, 1995
Resumen
Un coral blando del Mar Rojo consume exclusivamente fitoplancton, una nueva estrategia de alimentación para los corales. Este fitoplancton herbívoro permite que los corales azooxantelados (libres de zooxantelas) prosperen en aguas pobres en nutrientes.
Área de la Ciencia:
- Biología Marina Biología Marina.
- Ecología del coral Ecología del coral
- Zoología Zoología Zoología.
Sus antecedentes:
- La mayoría de los corales albergan zooxantelas simbióticas para su nutrición.
- Los corales azooxantelados generalmente dependen de la heterotropía (la captura de zooplancton).
- El fitoplancton es a menudo abundante en entornos de arrecifes oligotróficos.
Objetivo del estudio:
- Para investigar las estrategias de alimentación de los corales blandos azooxantelados.
- Para identificar nuevos modos nutricionales en los corales.
- Para entender la productividad de los corales en condiciones oligotróficas.
Principales métodos:
- Análisis dietético de los corales blandos del Mar Rojo.
- Observación de los comportamientos de alimentación en las especies de azooxantelas.
- Medidas de densidad de biomasa de plancton en aguas de arrecife.
Principales resultados:
- Se encontró que una especie de coral blando del Mar Rojo se alimentaba casi exclusivamente de fitoplancton.
- El herbívoro en el fitoplancton fue identificado en tres corales blandos azooxantelados adicionales.
- La biomasa de fitoplancton puede exceder significativamente la biomasa de zooplancton en aguas oligotróficas.
Conclusiones:
- El herbívoro del fitoplancton representa un modo nutricional previamente desconocido para los corales.
- Esta estrategia de alimentación permite a los corales azooxantelados lograr una alta productividad en ecosistemas de arrecifes limitados en nutrientes.
- Los corales azooxantelados pueden utilizar eficazmente los recursos de fitoplancton en aguas oligotróficas expuestas al flujo.
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