Temporal and spatial scales of variation in bacterioplankton assemblages of oligotrophic surface waters

Marine bacterioplankton dominate microbial carbon biomass in surface waters of the oligotrophic ocean, yet there have been few studies examining rates of change in bacterioplankton assemblage compositionin situover time and across water masses. Temporal changes in bacterioplankton assemblage composi...

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Bibliographic Details
Published in:Marine ecology. Progress series (Halstenbek) 2006-04, Vol.311, p.67-77
Main Authors: Hewson, Ian, Steele, Joshua A., Capone, Douglas G., Fuhrman, Jed A.
Format: Article
Language:English
Subjects:
Animal and plant ecology
Animal, plant and microbial ecology
Aquatic communities
Bacteria
Bacterioplankton
Biological and medical sciences
Chemical composition
Fundamental and applied biological sciences. Psychology
Marine
Oceans
Salinity
Sea water
Sea water ecosystems
Seas
Surface water
Synecology
Taxa
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Summary:Marine bacterioplankton dominate microbial carbon biomass in surface waters of the oligotrophic ocean, yet there have been few studies examining rates of change in bacterioplankton assemblage compositionin situover time and across water masses. Temporal changes in bacterioplankton assemblage composition were investigated during 7 drifter studies of 24 to 360 h duration in the oligotrophic Gulf of Mexico, the North Pacific and the West Tropical Atlantic in 2001 to 2003, using an assemblage fingerprinting technique, automated rRNA intergenic-spacer analysis (ARISA). The similarity indices between assemblages collected over time in the same drifter changed on average by a Sørensen index of 0.12 d-1(comparing the presence/absence of operational taxonomic units, OTU) and a Whittaker index (comparing proportions in various OTU) of 0.17 d-1per fingerprint, across all surface drifter studies. Fingerprints generated from 7 replicate bacterioplankton DNA samples collected at each of 2 stations were remarkably similar to each other, sharing a Whittaker index >0.85. Despite this consistency over small spatial scales (
ISSN:0171-8630
1616-1599
DOI:10.3354/meps311067