Dynamics of Seawater Bacterial Communities in a Shellfish Hatchery

Bacterial disease is a significant issue for larviculture of several species of shellfish, including oysters. One source of bacteria is the seawater used throughout the hatchery. In this study carried out at a commercial oyster hatchery in Tasmania, Australia, the diversity of the bacterial communit...

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Bibliographic Details
Published in:Microbial ecology 2013-08, Vol.66 (2), p.245-256
Main Authors: Powell, S. M., Chapman, C. C., Bermudes, M., Tamplin, M. L.
Format: Article
Language:English
Subjects:
Animals
Bacteria
Bacteria - classification
Bacteria - genetics
Bacteria - isolation & purification
Bacterial diseases
Biodiversity
Biological and medical sciences
Biomedical and Life Sciences
Community structure
Cyanobacteria
Ecology
Flavobacteria
Fundamental and applied biological sciences. Psychology
Geoecology/Natural Processes
Larvae
Life Sciences
Marine
Microbial Ecology
Microbiology
MICROBIOLOGY OF AQUATIC SYSTEMS
Molecular Sequence Data
Mortality
Nature Conservation
Ostreidae - microbiology
Oysters
Sea water
Seasons
Seawater
Seawater - microbiology
Shellfish
Shellfish - microbiology
Spats
Vibrio
Water Quality/Water Pollution
Water samples
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Summary:Bacterial disease is a significant issue for larviculture of several species of shellfish, including oysters. One source of bacteria is the seawater used throughout the hatchery. In this study carried out at a commercial oyster hatchery in Tasmania, Australia, the diversity of the bacterial community and its relationship with larval production outcomes were studied over a 2-year period using terminal restriction fragment length polymorphism and tag-encoded pyrosequencing. The bacterial communities were very diverse, dominated by the Alphaproteobacteria, Gammaproteobacteria, Flavobacteria and Cyanobacteria. The communities were highly variable on scales of days, weeks and seasons. The difference between the intake seawater and treated clean seawater used in the hatchery was smaller than the observed temporal differences in the seawater throughout the year. No clear correlation was observed between production outcomes and the overall bacterial community structure. However, one group of Cyanobacterial sequences was more abundant when mass mortality events occurred than when healthy spat were produced although they were always present.
ISSN:0095-3628
1432-184X
DOI:10.1007/s00248-013-0183-6