Spatial heterogeneity of phylogenetically diverse orange and white Beggiatoa mats in Guaymas Basin hydrothermal sediments Public Deposited

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Last Modified
  • March 21, 2019
Creator
  • McKay, Luke Justin
    • Affiliation: College of Arts and Sciences, Department of Marine Sciences
Abstract
  • Sulfide-oxidizing bacteria of the genus Beggiatoa form colorful mats on the seafloor above active hydrothermal seeps at Guaymas Basin. 113 temperature profiles were taken around 15 Beggiatoa mats to investigate spatial relationships between mat color and hydrothermal seeps. Average in situ temperatures of phylogenetically diverse orange and white filaments are 8-12 degree C, indicating that Guaymas Beggiatoa live in relatively cool conditions. Average temperatures 40 centimeters beneath all Beggiatoa mats are approximately 90C. Orange filaments are usually concentrated over hotter subsurface temperatures in the center of a mat than the major concentration of white filaments at the periphery; however, the range of subsurface temperatures changes from one mat to another. Elevated temperature profiles beneath orange Beggiatoa correlate with the shallowest sulfide accumulation maxima. We propose that spatial heterogeneity of orange and white filaments in a Guaymas Beggiatoa mat is controlled by delivery of, and proximity to, energy sources in the shallow subsurface.
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  • In Copyright
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  • "... in partial fulfillment of the requirements for the degree of Master of Science in the Department of Marine Sciences."
Advisor
  • Teske, Andreas
Degree granting institution
  • University of North Carolina at Chapel Hill
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Place of publication
  • Chapel Hill, NC
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  • Open access
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