Cyanobacterial community diversity in the sediments of the Pearl River Estuary in China

Fu-Lin Sun; You-Shao Wang; Mei-Lin Wu; Cui-Ci Sun

doi:10.3989/scimar.04106.07A

Autores/as

Fu-Lin Sun State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences - Daya Bay Marine Biology Research Station, South China Sea Institute of Oceanology https://orcid.org/0000-0003-3373-3000
You-Shao Wang State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences - Daya Bay Marine Biology Research Station, South China Sea Institute of Oceanology https://orcid.org/0000-0001-9565-2666
Mei-Lin Wu State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology https://orcid.org/0000-0002-3387-8122
Cui-Ci Sun State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences - Daya Bay Marine Biology Research Station, South China Sea Institute of Oceanology https://orcid.org/0000-0002-7332-5100

DOI:

https://doi.org/10.3989/scimar.04106.07A

Palabras clave:

estuario, sedimento, diversidad de la comunidad cianobacteriana, DGGE

Resumen

La diversidad de la comunidad de cianobacterias en el sedimento del estuario del río Perla en China fue evaluada en este estudio por electroforesis en gel de gradiente desnaturalizante (DGGE) durante las estaciones húmeda y seca. Las secuencias de nucleótidos obtenidas de bandas DGGE se clasificaron en cinco grupos de cianobacterias, incluyendo Synechococcus, Cyanobium, Chroococcus, Prochlorales y Tolypothrix. Synechococcus fue identificado como el grupo dominante de cianobacterias en las muestras de sedimento, su distribución varió desde la parte interna del estuario hasta la externa, con un amplio rango de adaptación a la salinidad. Los patrones observados de las comunidades de cianobacterias cambiaron marcadamente entre diferentes sitios de muestreo en diferentes estaciones del año y sugirió que la mayoría de las cianobacterias no provenían a través del agua dulce. Se realizó un análisis de correspondencia canónica (CCA) para determinar la relación entre variables ambientales y estructuras de las comunidades bacterianas durante la estación seca. Los resultados sugirieron que las distintas comunidades de cianobacterias estaban significativamente influenciadas por el pH, salinidad, PO₄-P y NO₃-N en los sedimentos.

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Citas

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