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Los gasterópodos subacuáticos consumen bacterias oxidantes de azufre: evidencia de las fuentes hidrotermales costeras
Resumen
El abalón negro (Haliotis cracherodii) en el sur de California consume bacterias oxidantes de azufre en las fuentes hidrotermales. Esta dieta apoya el crecimiento comparable a los que se alimentan de algas, lo que sugiere que la energía geotérmica contribuye a su nutrición.
Área de la Ciencia:
- Biología Marina Biología Marina.
- Ecología Ecología Ecología.
- La geoquímica es la geoquímica.
Sus antecedentes:
- El abalón negro (Haliotis cracherodii) son gasterópodos comercialmente importantes que se encuentran en el sur de California.
- Estos abalones habitan en aguas poco profundas y se observan con frecuencia en las fuentes hidrotermales subtidales.
Objetivo del estudio:
- Para investigar el comportamiento de alimentación del abalón negro en los respiraderos hidrotermales.
- Determinar la contribución nutricional de las bacterias oxidantes de azufre al crecimiento del abalón.
Principales métodos:
- Estudios observacionales del comportamiento de búsqueda de alimento del abalón en los respiraderos hidrotermales.
- Análisis comparativo del crecimiento de bacterias oxidantes de azufre alimentadas con abalones frente a microalgas y macroalgas.
Principales resultados:
- El abalón negro consume activamente bacterias filamentosas oxidantes de azufre que se encuentran en las esteras alrededor de los respiraderos hidrotermales.
- Las tasas de crecimiento de los abalones que consumen bacterias de azufre fueron más altas que las de los grupos de control alimentados con microalgas.
- Las tasas de crecimiento de los abalones alimentados por respiraderos fueron comparables a las de los alimentados con macroalgas.
Conclusiones:
- Los abalones negros utilizan bacterias oxidantes de azufre como fuente de alimento en los respiraderos hidrotermales.
- Es probable que las subvenciones a la energía geotérmica contribuyan a la nutrición y al crecimiento de las poblaciones de abalón negro en esta región.
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