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Development of Sulfidogenic Sludge from Marine Sediments and Trichloroethylene Reduction in an Upflow Anaerobic Sludge Blanket Reactor
Published on: October 15, 2015
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Un consorcio de microbios marinos que aparentemente median en la oxidación anaeróbica del metano
A Boetius1, K Ravenschlag, C J Schubert
1Max Planck Institute for Marine Microbiology, Bremen, Germany. aboetius@mpi-bremen.de
Nature
|October 18, 2000
Resumen
Se identificaron microorganismos responsables de la oxidación anaeróbica del metano. Estas arqueas y bacterias reductoras de sulfatos forman consorcios estructurados, mediando la conversión de metano en sedimentos marinos.
Área de la Ciencia:
- Microbiología marina microbiología marina.
- La geoquímica es la geoquímica.
- Los ciclos biogeoquímicos son ciclos biogeoquímicos.
Sus antecedentes:
- Los sedimentos marinos son un sumidero importante para el metano, convirtiéndolo en CO2 a través de la oxidación anaeróbica.
- La evidencia geoquímica confirma el consumo de metano, pero los microorganismos mediadores siguen sin ser identificados.
- La vía de la oxidación anaeróbica del metano (AOM) no se entiende completamente.
Objetivo del estudio:
- Para proporcionar evidencia microscópica de los microorganismos que median la oxidación anaeróbica del metano.
- Para aclarar la relación simbiótica entre las arqueas y las bacterias en AOM.
Principales métodos:
- La hibridación in situ por fluorescencia (FISH) utilizando sondas específicas de oligonucleótidos dirigidas al ARNr 16S.
- Análisis microscópico de consorcios arqueo-bacterianos en sedimentos marinos.
Principales resultados:
- Identificó un consorcio estructurado de arqueas y bacterias reductoras de sulfatos.
- Se observaron arqueas en agregados densos rodeados de bacterias reductoras de sulfatos.
- Se encontraron estos consorcios abundantes en sedimentos ricos en hidratos de gas con altas tasas de reducción de sulfatos a base de metano.
Conclusiones:
- La simbiosis arqueo-bacteriana identificada aparentemente media en la oxidación anaeróbica del metano.
- Este consorcio estructurado representa un actor clave en el ciclo del metano marino.
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