| Publications | | » | Using stable isotope probing to characterize differences between free-living and sediment-associated microorganisms in the subsurface.
 | | » | DOM in Lake Superior
| | » | Deepwater Horizon hydrocarbons in the marine environment
| | » | Microbes and marine DOM, Ann. Rev. Mar. Sci. 2011
| | » | Greenland ice sheet outlet glacier: Insights from a new isotope-mixing model
| | » | Groundwater DOM, GCA 2011
| | » | Dispersants & DWH, ES&T 2011
| | » | FT-MS variability in DOM, Org Geochem 2010
| | » | Predatory Flavobacteria, FEMS Microb Ecol 2010
| | » | Greenland Ice Sheet DOM, GCA 2010
| | » | Protozoa and bacteria in aquifers, FEMS Microb Ecol, 2009
| | » | Source markers in DOM, GCA 2009
| | » | Automated data analysis, Anal. Chem. 2006
| | » | Marine DOM and ESI FT-ICR MS; Marine Chem 2004
| | » | DOM extraction by C18; Org. Geochem. 2003
| | » | Black carbon by ESI FT-ICR MS; ES&T 2004
| | » | ESI FT-ICR MS review; Env. Forensics 2002
| | » | Marine protozoan surfactants; Marine Chem. 2002
| | » | ESI MS and NOM; Org. Geochem. 2002
| | » | ESI FT-ICR MS & humic acids; Anal. Chem. 2002
| | » | Protozoan DOM & PCBs; ES&T 2001
| | » | Protozoa & Fe, Th, C; Aquat. Microb. Ecol. 2001
| | » | PCB uptake by protozoa; AEM 2000
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Longnecker, K. and E. B. Kujawinski., Using stable isotope probing to characterize differences between free-living and sediment-associated microorganisms in the subsurface., Geomicrobiology Journal, 2012
Aquifers are subterranean reservoirs of freshwater with heterotrophic bacterial communities attached to the sediments and free-living in the groundwater. In the present study, mesocosms were used to assess factors controlling the diversity and activity of the subsurface bacterial community. The assimilation of 13C, derived from 13C-acetate, was monitored to determine whether the sediment-associated and free-living bacterial community would respond similarly to the presence of protozoan grazers. We observed a dynamic response in the sediment-associated bacterial community and none in the free-living community. The disparity in these observations highlights the importance of the sediment-associated bacterial community in the subsurface carbon cycle. |
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