Abstract:
:Marine macroalgae are subjected to large numbers of bacteria in their environment. These bacteria have the potential to affect the health and ecology of algae in a variety of ways and can be both beneficial and harmful to the algae. Therefore, algae have likely evolved mechanisms to differentially regulate the growth of bacterial species. In this study, we examined the effects of the green alga Dictyosphaeria ocellata on the bacterioplankton community in field enclosure experiments and on individual, naturally co-occurring bacterial strains in laboratory co-culture experiments. In field experiments, we compared the bacterioplankton communities of enclosures with and without D. ocellata using denaturing gradient gel electrophoresis and found that the alga significantly changed the bacterial community composition. Seven bacterial phylotypes were eliminated in the presence of the alga and five were found exclusively with the alga. We also examined the effects of algal-treated water on the development of the bacterial community within enclosures and found no change in the community composition. Laboratory co-culture experiments revealed that D. ocellata and D. ocellata extracts affect the growth of individual bacterial strains in a species-specific manner and that the mechanisms responsible for these effects also differed by bacterial species.
journal_name
FEMS Microbiol Ecoljournal_title
FEMS microbiology ecologyauthors
Sneed JM,Pohnert Gdoi
10.1111/j.1574-6941.2010.01005.xsubject
Has Abstractpub_date
2011-02-01 00:00:00pages
242-54issue
2eissn
0168-6496issn
1574-6941journal_volume
75pub_type
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