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Philip Bennett Ph.D.
University of Texas at Austin - Aqueous Geochemistry, Geomicrobiology
Research Interests:
Environmental groundwater geochemistry, silicate dissolution kinetics, and geomicrobiology, with a particularly interest in examining the role of minerals and mineral-bound nutrients in subsurface microbial ecology, and the role of subsurface microorganisms in accelerating rock weathering.
E-mail:
Will Berelson Ph.D.
University of Southern California - Geochemistry
Research Interests:
Biogeochemical cycles (modern and deep time), diagenesis and sediment geochemistry, layered microbial communities, oxygen uptake by microbes, methane/sulfate cycling in anoxic environments, biogenic mineral dissolution, trace metal cycling in sediments, paleoenvironmental proxies, tracers and in situ technology, coastal oceanography.
E-mail:
Penelope Boston Ph.D.
New Mexico Tech - Geobiology and Astrobiology
Research Interests:
Cave geomicrobiology, microbial life in highly mineralized environments, unique or characteristic biominerals and biosignature detection. Additionally, I am involved in astrobiology and the search for life beyond Earth. Cave formation mechanisms on other planetary bodies is a topic of particular interest to me. My background includes geology, microbiology, atmospheric chemistry, global biogeochemical cycling, and climate/life interactions.
E-mail:
 George T. Bonheyo Ph.D.
GeoBiologics, Inc.
Research Interests:
1) The impact of dynamic microbial communities on sedimentary records: how community structure and composition co-evolve with environmental pressure; successive colonization; the relationship between environmental stability and levels of diversity. 2) The transport and dispersal of ?extremeophiles? and implications for allopatric speciation; the use of geological dating methods to refine the molecular clock.
E-mail:
Sherry Cady Ph.D.
Portland State University - Geomicrobiology
Research Interests:
The interactions between microbes and their environment that result in biosignatures that become preserved in the geological record; development of instruments to study biosignature formation in-situ; application of microscopy and spectroscopy techniques to detect and characterize nanoscale biosignatures.
E-mail:
Greg Cutter Ph.D.
Old Dominion University - Chemical Oceanography/Biogeochemistry
Research Interests:
Processes affecting trace element speciation and distributions in natural waters and sediments; air-sea transport and exchange of gases and trace elements; paleoceanographic tracers; analytical methods for aquatic chemistry; computer modeling of geochemical processes.
E-mail:
Rupali Datta Ph.D.
University of Texas at San Antonio
Research Interests:
1. Environmental Plant Sciences with emphasis on: Phytoremediation of metal contaminated soil and water, genetic characterization of metal detoxification mechanisms in plants, Characterization of metal stress responses in plants.
2. Bioremediation - using microbes to remediate contaminated soils and water.
E-mail:
Katrina Edwards Ph.D.
Woods Hole Oceanographic Institution - Geomicrobiology
Research Interests:
Geomicrobiology and microbial biogeochemistry. The role of microorganisms in mediating the rates and mechanisms of rock, mineral, and organic matter transformations.
E-mail:
 Annette Summers Engel Ph.D.
Louisiana State University - Geomicrobiology
Research Interests:
The role of microbes in geologic and geochemical processes; diversity and ecology of microbes in subsurface (cave) environments, coupled S and C cycling by microbes, biomineralization, geochemical controls on microbial diversity.
E-mail:
Jack Farmer Ph.D.
Arizona State University - Astrobiology and Microbiology
Research Interests:
The role that microorganisms play in sedimentary processes, particularly in extreme environments that are analogs for the early Earth and other potentially habitablle planetary bodies in our Solar System, like Mars and Europa.
Read the exclusive biogeosciences.org interview with Jack.
E-mail:
 Bruce W. Fouke Ph.D.
University of Illinois Urbana-Champaign - Geology, Microbiology, Genomics Biology
Research Interests:
Microbe-water-mineral interactions in terrestrial hot springs; molecualr microbial ecology of coral disease.
E-mail:
 Jean-Pierre Gattuso Ph.D.
Laboratoire d'Océanographie - Diversity, Biogeochemistry, and Microbial Ecology
Research Interests:
Carbon and carbonate cycling in coastal ecosystems, including estuaries, contribution of the microbial loop in the carbon cycling of pelagic systems, and response of marine organisms to global environmental changes
E-mail:
 Vincent Gauci Ph.D.
The Open University - Department of Earth Sciences
Research Interests:
Biogeochemistry of wetlands, particularly with reference to sulfur and nitrogen pollutant impacts on terrestrial/atmosphere exchange of chemically and radiatively important gases. Specifically, I am researching ecosystem and chemical controls (e.g. acid rain sulfate deposition - both anthropogenic and volcanogenic) on methane emissions from both natural and artificial wetlands (rice paddies).
E-mail:
Anne Giblin Ph.D.
Marine Biology Laboratory - Biogeochemistry
Research Interests:
Cycling of elements in the environment, especially the biogeochemistry of iron, sulfur, nitrogen, and phosphorus. Much of my work has been focused in soils and sediments where I have examined element cycling under different conditions of oxidation and reduction. I have worked on topics such as the effects of increased sulfate deposition from acid rain on the sulfur cycle of lakes, the mobility of trace metals in salt marsh sediments, the controls on the availability of phosphorus in tundra soils, and the controls on denitrification in marine sediments.
E-mail:
John Grotzinger Ph.D.
Massachusetts Institute of Technology
Research Interests:
Tectonics and sedimentation; biogeology; earth history.
E-mail:
 JoAnn Holloway Ph.D.
U.S. Geological Survey-Crustal Imaging & Characterization
Research Interests:
Biogeochemical cycling of nitrogen, carbon, sulfur and trace metals in soils and water; Linkages between PLFA-based microbial ecology and biogeochemistry. Research sites have included California Coastal Ranges, Yellowstone National Park and Louisiana coastal wetlands.
E-mail:
Rob Jackson Ph.D.
Duke University - Biogeochemistry and Terrestrial Ecology
Research Interests:
Examines feedbacks between global change and the biosphere. Current projects in his lab include studies of the global carbon and water cycles, biosphere/atmosphere interactions, and vegetation change.
E-mail:
 Andreas Kappler Ph.D.
University of Tuebingen, Germany - Center for Applied Geosciences
Research Interests:
Our group is interested in microbe-mineral interactions, in particular in the mechanisms of precipitation and dissolution of iron minerals and the consequences of these processes for the fate of inorganic and organic pollutants such as arsenic and chlorinated solvents. We study basic microbial physiology as well as we use modern electron and laser microscopic techniques for the characterization of cell-mineral associations and apply new surface-sensitive X-ray techniques to describe iron minerals surfaces.
E-mail:
Tim Lyons Ph.D.
University of California, Riverside - Professor of Biogeochemistry in the Department of Earth Sciences
Research Interests:
Coupled biogeochemical cycles of trace metals, sulfur and organic carbon in oxygen-deficient marine settings and reconstructions of Precambrian paleoenvironments using a range of trace element and stable isotope approaches. From a geologic standpoint, these studies speak to issues as critical as the progressive oxygenation of the earth's early ocean and atmosphere and, thus, provide the chemical context for the evolution of multicellular life.
E-mail:
Judith McKenzie Ph.D.
Swiss Federal Institute of Technology Zurich - Biogeochemistry and Geomicrobiology
Research Interests:
The study of evidence for past climate and environmental change as recorded in chemical sediments from both lacustrine and marine systems. The study of important modern environmental systems, such as the Great Barrier Reef in Australia or hypersaline lagoons in Brazil or geochemical cycles in lakes in Switzerland, is emphasized in her research along with an evaluation of anthropogenic influences on these environments. Her research has recently taken a new direction into the field of geomicrobiology or biomineralization in an attempt to understand the influence of microbes on dolomite precipitation, particularly in the Earth's early history.
E-mail:
Karen McLaughlin Ph.D. (in progress)
Stanford University - Biogeochemistry
Research Interests:
Marine Biogeochemical cycles and nutrient cycling.
E-mail:
Ken Nealson Ph.D.
University of Southern California - Geobiology
Research Interests:
Develops methods that are now being interfaced with the study of organisms in extreme environments, and with upcoming missions, both for in situ life detection and for analysis of samples returned from Mars in future missions.
E-mail:
 Jason Neff Ph.D.
University of Colorado, Boulder - Biogeochemistry
Research Interests:
Biogeochemistry of the Western U.S., Northern Latitude Carbon Cycling, and more.
E-mail:
Nora Noffke Ph.D.
Old Dominion University - Biosedimentology and Geobiology
Research Interests:
I am interested in sedimentary systems (Archean to Recent). My work in modern marine environments focuses on the influence of biofilms and microbial mats on sedimentary dynamics, and the formation of 'microbially induced sedimentary structures'. In addition, I investigate Archean, Proterozoic and Phanerozoic rock successions with respect to bacterially generated structures, and the evolution of bacterial groups. Of special interest for me is extraterrestrial life.
E-mail:
Bill Reeburgh Ph.D.
University of California, Irvine - Terrestial and Marine Biogeochemistry
Research Interests:
Global cycles of biogeochemically important elements, methane biogeochemistry and organic carbon storage in high deposition rate marine sediments and anoxic marine basins, and high-latitude terrestrial environments in the global carbon and atmospheric methane budgets.
E-mail:
Professor William A. Reiners Ph.D.
University of Wyoming, Laramie - Department of Botany (Ecosystem Ecology)
Research Interests:
Spatial-temporal distribution of biogeochemical processes in terrestrial environments. Application of geographic information science tools to analysis, representation and modeling of biogeochemical processes in space. The role of transport in shaping ecosystems and providing connectivity at all spatial scales. Determination of the role of ecological stoichiometry throughout the biosphere.
E-mail:
Charles Rice Ph.D.
Kansas State University - Soil Microbiology
Research Interests:
Studies basic mechanisms in nutrient cycling, organic matter dynamics, and microbial ecology as they apply to agricultural and prairie ecosystems and environmental problems.
E-mail:
Jennifer Roberts Ph.D.
The University of Kansas- Geomicrobiology
Research Interests:
Bacterial interactions with rock, hydrogeology, geochemistry. Specifically; Microbial Ecology of Basalt, Microbial Community Structure and Metal Mobility in Tropical Soils, Mineralogic Control of Microbial Transport in Porous Media, and The Role of Microscale Heterogeneity in Microbial Attachment.
E-mail:
 Alakendra N Roychoudhury Ph.D.
University of Cape Town, South Africa
Research Interests:
Kinetics of microbially mediated reactions, rock-water-microbe interaction, life in extreme environments and its implication on early life, application of microbial reactions for remediation of impacted environmental systems, major and trace metal cycling coupled to carbon and sulfur cycles.
E-mail:
 Bradley Sageman Ph.D.
Northwestern University - Geological Sciences
Research Interests:
My research investigates the geobiologic controls on, and consequences of, changes in the deep time biogeochemical cycle of carbon. I focus mainly on the relationship between rates of organic carbon burial in marine sediments and factors such as nutrient cycling, oceanographic conditions, sea level change, and climate. The role of organisms in biogeochemical cycles, and the effect of changes in the aforementioned variables on ancient ecosystems, are key issues.
E-mail:
Dibyendu Sarkar Ph.D.
University of Texas at San Antonio - Earth and Environmental Science
Research Interests:
Environmental Biogeochemistry, Environmental Quality and Remediation, Nutrient Management, Human Health Risk Assessment
Primary research emphasis is on evaluation of field, greenhouse, and laboratory macroscopic and microscopic data to investigate plant and human bioavailability, aqueous and solid phase speciation, dissolution, mineralization, precipitation and adsorption mechanisms of contaminants and nutrients in soils.
E-mail:
Sybil Seitzinger Ph.D.
Rutgers University - Biogeochemistry
Research Interests:
The sources and transport of inorganic nutrients (N, C, P) in watersheds and their effect on aquatic ecosystems, especially at the coastal zone. The processes (i.e., natural and anthropogenic) that drive and influence elemental cycling (i.e., sources, transport, transformation and fate)
E-mail:
Roger Summons Ph.D.
Massachusetts Institute of Technology - Geobiology
Research Interests:
We study organic matter from microbes, environmental samples and rocks. Ancient rocks and oils contain a rich abundance of hidden information within, including molecular and isotopic signatures of the biota existing at the time the organic matter was formed. The goal of our research, then, is to extract and interpret these signals, in order to reconstruct ancient environments and understand how life evolved within them.
E-mail:
Susan Trumbore Ph.D.
University of California, Irvine - Biogeochemistry
Research Interests:
My research applies geochemical tracer techniques to study biosphere-atmosphere exchange of trace gases. Other research focuses on the processes determining the flux and isotopic composition of trace gas emissions from soils.
E-mail:
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