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dc.contributor.authorHodges, Lisa Renee
dc.date.accessioned2014-03-04T21:58:51Z
dc.date.available2014-03-04T21:58:51Z
dc.date.issued2002-08
dc.identifier.otherhodges_lisa_r_200208_ms
dc.identifier.urihttp://purl.galileo.usg.edu/uga_etd/hodges_lisa_r_200208_ms
dc.identifier.urihttp://hdl.handle.net/10724/29196
dc.description.abstractThis research examines the importance of bottom-up and top-down controls on bacterial abundance and community composition during summertime production in the coastal Arctic Ocean. Bacterial and viral abundance, bacterial community composition, and free-living (3 µm-filtered, FL) and particle-associated (unfiltered, FL+PA) assemblages were examined in the Chukchi Sea during August 2000. Nutrients, chlorophyll a, and particulate organic matter (POM) were also measured. Bacteria were isolated and analyzed by DGGE, 16S rDNA sequence analysis, and for substrate utilization. Increased bacterial and viral abundance, decreased species richness, and decreased similarity (Sorenson’s Index) between FL and PA assemblages occurred in high versus low POM regions. Bacterial abundance, species richness, and Sorenson’s Index correlated best with POM, while viral abundance correlated best with bacterial abundance. Algal bloom conditions producing high POM concentrations may therefore increase bacterial and viral abundance, reducing species richness, and promote differences between FL and PA assemblages.
dc.languageMicrobial dynamics in the Arctic Chukchi Sea : differences in microbial abundance and bacterial community composition in high and low production regimes
dc.publisheruga
dc.rightspublic
dc.subjectBacterioplankton
dc.subjectBacterial abundance
dc.subjectViral abundance
dc.subjectBacterial community composition
dc.subjectDGGE
dc.subjectParticle-associated bacteria
dc.subjectFree-living bacteria
dc.subjectPsychrophiles
dc.subjectArctic
dc.subjectMarine
dc.titleMicrobial dynamics in the Arctic Chukchi Sea : differences in microbial abundance and bacterial community composition in high and low production regimes
dc.typeThesis
dc.description.degreeMS
dc.description.departmentMarine Sciences
dc.description.majorMarine Sciences
dc.description.advisorPatricia Yager
dc.description.committeePatricia Yager
dc.description.committeeJames Hollibaugh
dc.description.committeeMary Ann Moran


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