Biodiversity and Succession in the Deep Ocean
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Transcript of Biodiversity and Succession in the Deep Ocean
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Biodiversity and Succession in the Deep OceanBy Group B21: Brendan Schmidt, Sam Starcevic, Jimmy Nguyen
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Introduction: Ecological Succession
Primary succession
Secondary succession
Ex: lava flow vs. forest fire
Source: http://www.physicalgeography.net/fundamentals/9i.html
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Introduction: Hydrothermal Vents Key role in
evolution Hot beds of
bacterial activity Hot vents each
have a lifetime and eventually become inactive
Source: http://www.ceoe.udel.edu/deepsea/level-2/geology/vents.html
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Introduction: Sylvan et al. Experiment
Provide evidence that ecological succession occurs at hydrothermal vents after active state
Two sequencing techniques
Comparison of biodiversity of inactive and active vents
Source: http://www.pmel.noaa.gov/pubs/outstand/embl1429/north.shtml
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Rarefaction Curves Biodiversity of Inactive Vents Comparison to Active Vents
Data/Results
Source: http://mbio.asm.org/content/3/1/e00279-11.full.pdf+html
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Data/Results
Bacterial Populations are Significantly Different
Alpha-, Beta-, Delta-, and Gammaproteobacteria dominate
Lack of Epsilonproteobacteria and Aquificae
Source: http://mbio.asm.org/content/3/1/e00279-11.full.pdf+html
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What Does it Mean? Proteobacteria in
vents recovered after cessation of venting
Composition different from active vents
Evidence reveals diverse set of geochemical transformationsSource:
http://mbio.asm.org/content/3/1/e00279-11.full
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Conclusion Like in Jurassic
Park, Life finds a way.
Source: http://thatwasjunk.com/2010/12/27/my-favorite-movies-7-jurassic-park/
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Literature Citations Sylvan JB, Toner BM, Edwards KJ. 2012. Life and death of
deep-sea vents: bacterial diversity and ecosystem succession on inactive hydrothermal sulfides. mBio 3(1):e00279-11. doi:10.1128/mBio.00279-11.
. "Ecological Succession." . Pennsylvania State University, 2002. Web. 29 Sep 2012. <http://www.psu.edu/dept/nkbiology/naturetrail/succession.htm>.
. "Hydrothermal Vents." Voyage to the Deep. University of Delaware College of Marine Studies, n.d. Web. 29 Sep 2012. <http://www.ceoe.udel.edu/deepsea/level-2/geology/vents.html>.