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Virginia Collier Kevin Davis Katelyn Hollingsworth Marion Juren

Life and Death of Deep Sea Vents: Bacterial Diversity and Ecosystem Succession on Inactive Hydrothermal Sulfides. Virginia Collier Kevin Davis Katelyn Hollingsworth Marion Juren. What is a hydrothermal sulfide?. There are both active and inactive sulfides. Active sulfide:

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Virginia Collier Kevin Davis Katelyn Hollingsworth Marion Juren

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  1. Life and Death of Deep Sea Vents: Bacterial Diversity and Ecosystem Succession on Inactive Hydrothermal Sulfides Virginia Collier Kevin Davis Katelyn Hollingsworth Marion Juren

  2. What is a hydrothermal sulfide? • There are both active and inactive sulfides. • Active sulfide: • A superheated underwater geyser • Inactive sulfide: • The structure that remains after venting is ceased

  3. Purpose of the Experiment • Exploration of the Microbiology of Inactive Hydrothermal Sulfides • To further study ecological succession on hydrothermal sulfides • Use tag pyrosequencing to assess bacterial diversity associated with inactive sulfide chimneys using samples from 9°N on the East Pacific Rise (Sylvan et al.)

  4. Ecological Succession Life on an Active Hydrothermal Sulfide Life on an Inactive Hydrothermal Sulfide http://eager2009.files.wordpress.com/2009/06/image_thumb13.png?w=244&h=184 http://www.mbari.org/expeditions/GOC12/legs/leg7/logbookL7/images/day5/D395_09_06_40_25.jpg

  5. Ecological Succession • Disturbance shifts species diversity on a macro and micro scale (Shank et al.) • Rare biospheres succeed majority populations on inactive chimneys • Environmentally favorable (Sylvan et al.) Sylvan J B et al. mBio 2012; doi:10.1128/mBio.00279-11

  6. Diversity • Simpson’s Index for inactive sites is between 1.6 and 23.7 • Active sites are between 8.3 and 21.8 (Freeman, Sylvan et al.) • Not all sample sites are comprised of the same populations or proportions Sylvan J B et al. mBio 2012; doi:10.1128/mBio.00279-11

  7. Phylogenetic Tree of Predominant Bacteria on Inactive Sulfides Sylvan J B et al. mBio 2012; doi:10.1128/mBio.00279-11

  8. Results • Ecological seccession causes population magnitudes to beinverted on inactive sulfides • Diversity is not uniform across sample sites • Different sites have different seccessionary pathways (Sylvan et al.)

  9. In Conclusion… Inactive sulfides are an example of secondary succession and are low-diversity environments compared to other deep-sea ecosystems.

  10. References • Freeman, Scott. Biological Science. San Fransicso, CA: Benjamin Cummings, 2011. Print. • Shank, T., D. Fornari, K. Vondamm, M. Lilley, R. Haymon, and R. Lutz. "Temporal and Spatial Patterns of Biological Community Development at Nascent Deep-sea Hydrothermal Vents (9°50′N, East Pacific Rise)." Deep Sea Research Part II: Topical Studies in Oceanography 45.1-3 (1998): 465-515. • Sylvan, Jason M., Brandy M. Toner, and Katrina J. Edwards. "Life and Death of Deep-Sea Vents: Bacterial Diversity and Ecosystem Succession on Inactive Hydrothermal Sulfides." MBio 3 (2012): n. pag. American Society for Microbiology, 24 Jan. 2012. Web. Sept. 2012.

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