title: The Guaymas Basin Hiking Guide to Hydrothermal Mounds, Chimneys, and Microbial Mats: Complex Seafloor Expressions of Subsurface Hydrothermal Circulation.
abstract: The hydrothermal mats, mounds, and chimneys of the southern Guaymas Basin are the surface expression of complex subsurface hydrothermal circulation patterns. In this overview, we document the most frequently visited features of this hydrothermal area with photographs, temperature measurements, and selected geochemical data; many of these distinct habitats await characterization of their microbial communities and activities. Microprofiler deployments on microbial mats and hydrothermal sediments show their steep geochemical and thermal gradients at millimeter-scale vertical resolution. Mapping these hydrothermal features and sampling locations within the southern Guaymas Basin suggest linkages to underlying shallow sills and heat flow gradients. Recognizing the inherent spatial limitations of much current Guaymas Basin sampling calls for comprehensive surveys of the wider spreading region.
authors.affiliation: Department of Marine Sciences, University of North Carolina at Chapel Hill Chapel Hill, NC, USA.
authors.forename: Andreas
authors.initials: A
authors.lastname: Teske
authors.affiliation: Microsensor Group, Max Planck Institute for Marine Microbiology Bremen, Germany.
authors.forename: Dirk
authors.initials: D
authors.lastname: de Beer
authors.affiliation: Department of Marine Sciences, University of North Carolina at Chapel HillChapel Hill, NC, USA; Center for Biofilm Engineering and Department of Land Resources and Environmental Sciences, Montana State UniversityBozeman, MT, USA.
authors.forename: Luke J
authors.initials: LJ
authors.lastname: McKay
authors.affiliation: Department of Marine Chemistry and Geochemistry, Woods Hole Oceanographic Institution Woods Hole, MA, USA.
authors.forename: Margaret K
authors.initials: MK
authors.lastname: Tivey
authors.affiliation: School of Marine Science and Policy, University of Delaware Lewes, DE, USA.
authors.forename: Jennifer F
authors.initials: JF
authors.lastname: Biddle
authors.affiliation: Department of Marine Sciences, University of North Carolina at Chapel Hill Chapel Hill, NC, USA.
authors.forename: Daniel
authors.initials: D
authors.lastname: Hoer
authors.affiliation: Department of Marine Sciences, University of North Carolina at Chapel HillChapel Hill, NC, USA; Department of Microbiology, University of Tennessee at KnoxvilleKnoxville, TN, USA.
authors.forename: Karen G
authors.initials: KG
authors.lastname: Lloyd
authors.affiliation: Department of Marine Sciences, University of North Carolina at Chapel HillChapel Hill, NC, USA; Department of Environmental Sciences, Eidgenössische Technische HochschuleZurich, Switzerland.
authors.forename: Mark A
authors.initials: MA
authors.lastname: Lever
authors.affiliation: Center for Geomicrobiology, Aarhus University Aarhus, Denmark.
authors.forename: Hans
authors.initials: H
authors.lastname: Røy
authors.affiliation: Department of Marine Sciences, University of North Carolina at Chapel Hill Chapel Hill, NC, USA.
authors.forename: Daniel B
authors.initials: DB
authors.lastname: Albert
authors.affiliation: Department of Marine Sciences, University of North Carolina at Chapel Hill Chapel Hill, NC, USA.
authors.forename: Howard P
authors.initials: HP
authors.lastname: Mendlovitz
authors.affiliation: Department of Marine Sciences, University of North Carolina at Chapel Hill Chapel Hill, NC, USA.
authors.forename: Barbara J
authors.initials: BJ
authors.lastname: MacGregor
keywords: Beggiatoa mat; Guaymas basin; heatflow; hydrothermal circulation; hydrothermal sediment; in situ profiles; porewater chemistry