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Bacterioplankton community in Chesapeake Bay: Predictable or random assemblages
Author(s) -
Kan Jinjun,
Crump Byron C.,
Wang Kui,
Chen Feng
Publication year - 2006
Publication title -
limnology and oceanography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.7
H-Index - 197
eISSN - 1939-5590
pISSN - 0024-3590
DOI - 10.4319/lo.2006.51.5.2157
Subject(s) - bacterioplankton , gammaproteobacteria , actinobacteria , temperature gradient gel electrophoresis , bacteroidetes , alphaproteobacteria , biology , planctomycetes , ecology , betaproteobacteria , chesapeake bay , estuary , nutrient , phytoplankton , bacteria , 16s ribosomal rna , genetics
We monitored bacterioplankton communities from Chesapeake Bay over 2 years (2002‐2004) by use of denaturing gradient gel electrophoresis (DGGE) of PCR‐amplified 16S rRNA gene. Chesapeake Bay bacterioplankton exhibited a repeatable annual pattern and strong seasonal shifts. In winter, the bacterial communities were dominated by Alphaproteobacteria and Actinobacteria , whereas in summer, the predominant bacteria were members of Alphaproteobacteria , Gammaproteobacteria , Cyanobacteria , Actinobacteria , Planctomycetes , and Bacteroidetes . Phylotypes of Alphaproteobacteria and Actinobacteria present in warm seasons were different from those in cold seasons. Relatively stable communities were present in summer‐fall across the sampling years, whereas winter communities were highly variable interannually. Temporal variations in bacterial communities were best explained by changes of chlorophyll a (Chl a ) and water temperature, but dissolved oxygen, ammonia, nitrite and nitrate, and viral abundance also contributed significantly to the bacterial seasonal variations.