# overview
Microbes are the major mediators of biogeochemical cycles on earth.  Although tiny, their metabolisms have global implications.  My research focuses on two aspects of microbial ecology - interactions between the ocean crust and marine microbes, and the impact of anthropogenic influence on marine microbes. I determine the effect microbial communities have on biogeochemical cycles in a variety of settings through quantification of microbial biomass, analysis of microbial diversity and function, and measurement of microbial activity.  My research is interdisciplinary and involves collaboration with chemists, geologists and biological oceanographers.

# keywords[]
Flower Garden Banks National Marine Sanctuary

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Brandeis University - (Waltham, Massachusetts, United States)

# educationAndTraining[].organization.label
Rutgers University - (New Brunswick, New Jersey, United States)

# educationAndTraining[].organization.label
Rutgers University - (New Brunswick, New Jersey, United States)

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Data report: X-ray fluorescence scanning of sediment cores, IODP Expedition 390/393 Site U1583, South Atlantic Transect

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Inactive hydrothermal vent microbial communities are important contributors to deep ocean primary productivity.

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Carbon fixation by basalt-hosted microbial communities.

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Data report: X-ray fluorescence scanning of sediment cores, IODP Expedition 390/393 Site U1561, South Atlantic Transect

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Evidence for microbial mediation of subseafloor nitrogen redox processes at Loihi Seamount, Hawaii

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Extracellular Enzyme Activity Profile in a Chemically Enhanced Water Accommodated Fraction of Surrogate Oil: Toward Understanding Microbial Activities After the Deepwater Horizon Oil Spill.

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Spatially resolved sampling reveals dynamic microbial communities in rising hydrothermal plumes across a back-arc basin.

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Carbon fixation by basalt-hosted microbial communities

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Microbial Community Dynamics Provide Evidence for Hypoxia During a Coral Reef Mortality Event

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Identification and Removal of Contaminant Sequences From Ribosomal Gene Databases: Lessons From the Census of Deep Life.

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Bacteria-Oil Microaggregates Are an Important Mechanism for Hydrocarbon Degradation in the Marine Water Column.

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Data report: high-resolution digital imaging of whole-round hard rocks collected during IODP Expeditions 390C, 395E, 390, and 393, South Atlantic Transect, using a DMT CoreScan3

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Phosphorus limits phytoplankton growth on the Louisiana shelf during the period of hypoxia formation.

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Phytoplankton taxon-specific orthophosphate (Pi) and ATP utilization in the western subtropical North Atlantic

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Limited latitudinal mantle plume motion for the Louisville hotspot (vol 5, pg 911, 2012)

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Seasonal distributions of organic nutrients on the Louisiana continental shelf and their implications for nutrient limitation and hypoxia formation

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Microbial Communities on Seafloor Basalts at Dorado Outcrop Reflect Level of Alteration and Highlight Global Lithic Clades.

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International Ocean Discovery Program Expedition 360 Preliminary Report: Southwest Indian Ridge Lower Crust and Moho the nature of the lower crust and Moho at slower spreading ridges (SloMo Leg 1)

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Expedition 390 Preliminary Report: South Atlantic Transect 1

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International Ocean Discovery Program (IODP)

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Microbial Community Dynamics Provide Evidence for Hypoxia during a Coral Reef Mortality Event.

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Validating the Cyc2 Neutrophilic Iron Oxidation Pathway Using Meta-omics of Zetaproteobacteria Iron Mats at Marine Hydrothermal Vents.

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A multi-modal approach to measuring particulate iron speciation in buoyant hydrothermal plumes

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Dynamic Accretion Beneath a Slow-Spreading Ridge Segment: IODP Hole 1473A and the Atlantis Bank Oceanic Core Complex

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Microbial ecology of the dark ocean above, at, and below the seafloor.

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Quantitative microbial taxonomy across particle size, depth, and oxygen concentration.

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Rapid Formation of Microbe-Oil Aggregates and Changes in Community Composition in Coastal Surface Water Following Exposure to Oil and the Dispersant Corexit.

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Halomonas and Marinobacter ecotypes from hydrothermal vent, subseafloor and deep-sea environments.

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On a Reef Far, Far Away: Anthropogenic Impacts Following Extreme Storms Affect Sponge Health and Bacterial Communities

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Microbial activity in the marine deep biosphere: progress and prospects.

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Low temperature geomicrobiology follows host rock composition along a geochemical gradient in lau basin.

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Data report: X-ray fluorescence scanning of sediment cores, IODP Expedition 390/393 Site U1558, South Atlantic Transect

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Exoenzymes as a Signature of Microbial Response to Marine Environmental Conditions.

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Prospects for the study of evolution in the deep biosphere.

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Data report: X-ray fluorescence scanning of sediment cores, IODP Expedition 390/393 Site U1556, South Atlantic Transect

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Hydromechanical Effects of Micro-Organisms on Fine-Grained Sediments During Early Burial

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Author Correction: Recycling and metabolic flexibility dictate life in the lower oceanic crust.

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Distribution of Extracellular Flavins in a Coastal Marine Basin and Their Relationship to Redox Gradients and Microbial Community Members.

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International Ocean Discovery Program (IODP)

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Role of Polysaccharides in Diatom Thalassiosira pseudonana and its Associated Bacteria in Hydrocarbon Presence.

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Niche Partitioning between Coastal and Offshore Shelf Waters Results in Differential Expression of Alkane and Polycyclic Aromatic Hydrocarbon Catabolic Pathways.

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In-situ incubation of iron-sulfur mineral reveals a diverse chemolithoautotrophic community and a new biogeochemical role for Thiomicrospira.

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Data report: high downhole resolution portable X-ray fluorescence geochemistry of South Atlantic Transect basement cores, IODP Expeditions 390C, 395E, 390, and 393

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Going West: Nutrient Limitation of Primary Production in the Northern Gulf of Mexico and the Importance of the Atchafalaya River

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Biological response to dissolved versus dispersed oil.

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Role of yeast SIR genes and mating type in directing DNA double-strand breaks to homologous and non-homologous repair paths.

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New Insight into Microbial Iron Oxidation as Revealed by the Proteomic Profile of an Obligate Iron-Oxidizing Chemolithoautotroph.

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Eutrophication-induced phosphorus limitation in the Mississippi River plume: Evidence from fast repetition rate fluorometry

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Data report: X-ray fluorescence scanning of sediment cores, IODP Expedition 390/393 Site U1560, South Atlantic Transect

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Mesopelagic microbial community dynamics in response to increasing oil and Corexit 9500 concentrations.

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Bacterial abundance and diversity in 64-74Ma subseafloor igneous basement from the Louisville Seamount Chain.

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Extracellular Enzyme Activity and Microbial Diversity Measured on Seafloor Exposed Basalts from Loihi Seamount Indicate the Importance of Basalts to Global Biogeochemical Cycling

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Mapping Phytoplankton Community Physiology on a River Impacted Continental Shelf: Testing a Multifaceted Approach

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Limited latitudinal mantle plume motion for the Louisville hotspot

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Seasonal distributions of organic nutrients on the Louisiana continental shelf and their implications for nutrient limitation and hypoxia formation (vol 154, pg 113, 2013)

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IODP Expedition 360: First stage of drilling into Earth's Mantle

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Expedition 390/393 Scientific Prospectus Addendum: The South Atlantic Transect

# publications[].publisher
International Ocean Discovery Program (IODP)

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On a Reef Far, Far Away Anthropogenic Impacts Following Extreme Storms Affect Sponge Health and Bacterial Communities

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Potential Phosphorus Uptake Mechanisms in the Deep Sedimentary Biosphere

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Microbial Abundance and Diversity in Subsurface Lower Oceanic Crust at Atlantis Bank, Southwest Indian Ridge.

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Under the sea: microbial life in volcanic oceanic crust.

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Niche Partitioning Between Coastal and Offshore Shelf Waters Results in Differential Expression of Alkane and PAH Catabolic Pathways

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Nitrogen Cycling of Active Bacteria within Oligotrophic Sediment of the Mid-Atlantic Ridge Flank

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Validating the Cyc2 neutrophilic Fe oxidation pathway using meta-omics of Zetaproteobacteria iron mats at marine hydrothermal vents

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Data report: X-ray fluorescence scanning of sediment cores, IODP Expedition 390/393 Site U1557, South Atlantic Transect

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Localized hypoxia may have caused coral reef mortality at the Flower Garden Banks

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Bacillus rigiliprofundi sp. nov., an endospore-forming, Mn-oxidizing, moderately halophilic bacterium isolated from deep subseafloor basaltic crust.

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Meta-omics highlights the diversity, activity and adaptations of fungi in deep oceanic crust.

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Extracellular enzyme activity and microbial diversity measured on seafloor exposed basalts from Loihi seamount indicate the importance of basalts to global biogeochemical cycling.

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Life and death of deep-sea vents: bacterial diversity and ecosystem succession on inactive hydrothermal sulfides.

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Data report: X-ray fluorescence scanning of sediment cores, IODP Expedition 390/393 Site U1559, South Atlantic Transect

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Time-series analysis of two hydrothermal plumes at 950'N East Pacific Rise reveals distinct, heterogeneous bacterial populations.

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Recycling and metabolic flexibility dictate life in the lower oceanic crust.

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The role of microbially-mediated exopolymeric substances (EPS) in regulating Macondo oil transport in a mesocosm experiment

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Editorial: Recent Advances in Geomicrobiology of the Ocean Crust.

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Microbial abundance and diversity in 64-74 Ma subseafloor igneous basement from the Louisville Seamount Chain

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RAPID: Collaborative Research: Impact of Freshwater Runoff from Hurricane Harvey on Coral Reef Benthic Organisms and Associated Microbial Communities

# researcherOn[].awardedBy.label
National Science Foundation - (Arlington, Virginia, United States)

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Collaborative Research: Delineating The Microbial Diversity and Cross-domain Interactions in The Uncharted Subseafloor Lower Crust Using Meta-omics and Culturomics

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National Science Foundation - (Arlington, Virginia, United States)

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Collaborative Research: From Hot to Cold in the Dark - Shifts in Seafloor Massive Sulfide Microbial Communities as Physical and Geochemical Conditions Change after Venting Ceases

# researcherOn[].awardedBy.label
National Science Foundation - (Arlington, Virginia, United States)

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Aggregation and Degradation of Dispersants and Oil by Microbial Exopolymers 2 (ADDOMEx-2): Towards a synthesis of process and pathways of marine oil snow formation

# researcherOn[].awardedBy.label
Gulf of Mexico Research Initiative - (Ocean Springs, Mississippi, United States)

# streetAddress
Texas A&M University; Oceanography; 3146 TAMU

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Explanation Found For Die-Off Of Coral Reefs In Gulf Of Mexico

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A&M Research Supporter, Naational Science Foundation Celebrates 70 Years

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Texas A&M Research Team Finds Life Deep Beneath Ocean Floor

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Extremophile Microbes Found Thriving Half A Mile Beneath The Seafloor