selected scholarly activity
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academic article
- Alum Addition Triggers Hypoxia in an Engineered Pit Lake. Microorganisms. 10:510-510. 2022
- Isotopic and Chemical Assessment of the Dynamics of Methane Sources and Microbial Cycling during Early Development of an Oil Sands Pit Lake. Microorganisms. 9:2509-2509. 2021
- Organic Material Distribution in Mars-Analog Volcanic Rocks, as Determined with Ultraviolet Laser-Induced Fluorescence Spectroscopy. Astrobiology. 21:981-996. 2021
- Isomer-specific monitoring of naphthenic acids at an oil sands pit lake by comprehensive two-dimensional gas chromatography–mass spectrometry. Science of the Total Environment. 746:140985-140985. 2020
- Large freshwater phages with the potential to augment aerobic methane oxidation. Nature Microbiology. 5:1504-1515. 2020
- Microbial community distribution in variously altered basalts: Insights into astrobiology sample site selection. Planetary and Space Science. 194:105107-105107. 2020
- Compound specific isotope analysis of lipid residues provides the earliest direct evidence of dairy product processing in South Asia. Scientific Reports. 10:16095. 2020
- Origin of Groundwater Arsenic in a Rural Pleistocene Aquifer in Bangladesh Depressurized by Distal Municipal Pumping. Water Resources Research. 56:e2020WR027178. 2020
- Biosignatures Associated with Freshwater Microbialites. Life. 10:66-66. 2020
- Hydrophobicity of peat soils: Characterization of organic compound changes associated with heat-induced water repellency. Science of the Total Environment. 714:136444-136444. 2020
- Early-earth nonprotein amino acid metabolites in modern cyanobacterial microbialites. Environmental Chemistry Letters. 18:467-473. 2020
- Stability of Microbial Community Profiles Associated with Compacted Bentonite from the Grimsel Underground Research Laboratory. mSphere. 4. 2019
- The co-importance of physical mixing and biogeochemical consumption in controlling water cap oxygen levels in Base Mine Lake. Applied Geochemistry. 111:104442-104442. 2019
- Spatial Distribution and Preservation of Carbon Isotope Biosignatures in Freshwater Microbialite Carbonate. ACS Earth and Space Chemistry. 3:335-343. 2019
- Strategic Planning Insights for Future Science-Driven Extravehicular Activity on Mars. Astrobiology. 19:347-368. 2019
- Profiling of individual naphthenic acids at a composite tailings reclamation fen by comprehensive two-dimensional gas chromatography-mass spectrometry. Science of the Total Environment. 649:1522-1531. 2019
- Putative Mixotrophic Nitrifying-Denitrifying Gammaproteobacteria Implicated in Nitrogen Cycling Within the Ammonia/Oxygen Transition Zone of an Oil Sands Pit Lake. Frontiers in Microbiology. 10:2435. 2019
- Fluctuations in populations of subsurface methane oxidizers in coordination with changes in electron acceptor availability. FEMS Microbiology Ecology. 94. 2018
- Influence of seasonal temperature on tree-ring δ13C in different-aged temperate pine forests. Forest Ecology and Management. 419-420:197-205. 2018
- The interplay of methane and ammonia as key oxygen consuming constituents in early stage development of Base Mine Lake, the first demonstration oil sands pit lake. Applied Geochemistry. 93:49-59. 2018
- Detecting aromatic compounds on planetary surfaces using ultraviolet time-resolved fluorescence spectroscopy. Planetary and Space Science. 151:1-10. 2018
- Improved coverage of naphthenic acid fraction compounds by comprehensive two-dimensional gas chromatography coupled with high resolution mass spectrometry. Journal of Chromatography Journal of Chromatography A. 1536:88-95. 2018
- Anaerobic biodegradation of dissolved ethanol in a pilot-scale sand aquifer: Variability in plume (redox) biogeochemistry. Journal of Contaminant Hydrology. 208:35-45. 2018
- Lead isotopes as particulate contaminant tracers and chronostratigraphic markers in lake sediments in northeastern North America. Chemical Geology. 477:47-57. 2018
- The Complete Genome and Physiological Analysis of the Eurythermal Firmicute Exiguobacterium chiriqhucha Strain RW2 Isolated From a Freshwater Microbialite, Widely Adaptable to Broad Thermal, pH, and Salinity Ranges. Frontiers in Microbiology. 9:3189. 2018
- The Complete Genome and Physiological Analysis of the Microbialite-Dwelling Agrococcus pavilionensis sp. nov; Reveals Genetic Promiscuity and Predicted Adaptations to Environmental Stress. Frontiers in Microbiology. 9:2180. 2018
- Variability in carbon uptake and (re)cycling in Antarctic cryptoendolithic microbial ecosystems demonstrated through radiocarbon analysis of organic biomarkers. Geobiology. 16:62-79. 2018
- Robust, high-productivity phototrophic carbon capture at high pH and alkalinity using natural microbial communities. Biotechnology for Biofuels. 10:84. 2017
- Human and livestock waste as a reduced carbon source contributing to the release of arsenic to shallow Bangladesh groundwater. Science of the Total Environment. 595:63-71. 2017
- Elucidating carbon sources driving microbial metabolism during oil sands reclamation. Advances in Environmental Research Journal of Environmental Management. 188:246-254. 2017
- Microbial response to oil enrichment in Gulf of Mexico sediment measured using a novel long-term benthic lander system. Elementa. 5. 2017
- An oligotrophic deep-subsurface community dependent on syntrophy is dominated by sulfur-driven autotrophic denitrifiers. Proceedings of the National Academy of Sciences of the United States of America. 113:E7927-E7936. 2016
- Sulfur mass-independent fractionation in subsurface fracture waters indicates a long-standing sulfur cycle in Precambrian rocks. Nature Communications. 7:13252. 2016
- Stimulation of Microbially Mediated Arsenic Release in Bangladesh Aquifers by Young Carbon Indicated by Radiocarbon Analysis of Sedimentary Bacterial Lipids. Environmental Science & Technology. 50:7353-7363. 2016
- Variations in microbial carbon sources and cycling in the deep continental subsurface. Geochmica et Cosmochimica Acta. 173:264-283. 2016
- Time-resolved detection of aromatic compounds on planetary surfaces by ultraviolet laser induced fluorescence and Raman spectroscopy. Planetary and Space Science. 119:200-207. 2015
- Sulfur Biogeochemistry of an Oil Sands Composite Tailings Deposit. Frontiers in Microbiology. 6:1533. 2015
- Identification of individual thiophene-, indane-, tetralin-, cyclohexane-, and adamantane-type carboxylic acids in composite tailings pore water from Alberta oil sands. Rapid Communications in Mass Spectrometry. 28:2075-2083. 2014
- Prokaryote populations of extant microbialites along a depth gradient in Pavilion Lake, British Columbia, Canada. Geobiology. 12:250-264. 2014
- An ultraviolet Raman wavelength for the in-situ analysis of organic compounds relevant to astrobiology. Planetary and Space Science. 93-94:65-70. 2014
- Deciphering microbial carbon substrates in PAH contaminated sediments using phospholipid fatty acids, and compound specific δ13C and Δ14C. Organic Geochemistry. 69:76-87. 2014
- Soluble organic compounds in the Tagish Lake meteorite. Meteoritics and Planetary Science. 49:526-549. 2014
- Time-resolved stand-off UV-Raman spectroscopy for planetary exploration. Planetary and Space Science. 92:88-100. 2014
- Autotrophic and heterotrophic associated biosignatures in modern freshwater microbialites over seasonal and spatial gradients. Organic Geochemistry. 67:8-18. 2014
- Rapid Degradation of Deepwater Horizon Spilled Oil by Indigenous Microbial Communities in Louisiana Saltmarsh Sediments. Environmental Science & Technology. 47:13303-13312. 2013
- Microstructure variability in freshwater microbialites, Pavilion Lake, Canada. Palaeogeography, Palaeoclimatology, Palaeoecology. 392:62-70. 2013
- Isotopic biosignatures in carbonate-rich, cyanobacteria-dominated microbial mats of the Cariboo Plateau, B.C.. Geobiology. 11:437-456. 2013
- Radiocarbon Evidence of Active Endolithic Microbial Communities in the Hyperarid Core of the Atacama Desert. Astrobiology. 13:607-616. 2013
- Characterization of the acidic cold seep emplaced jarositic Golden Deposit, NWT, Canada, as an analogue for jarosite deposition on Mars. Icarus. 224:382-398. 2013
- The relative contribution of methanotrophs to microbial communities and carbon cycling in soil overlying a coal-bed methane seep. FEMS Microbiology Ecology. 84:474-494. 2013
- PAH Fluxes to Siskiwit Revisted: Trends in Fluxes and Sources of Pyrogenic PAH and Perylene Constrained via Radiocarbon Analysis. Environmental Science & Technology. 47:5066-5073. 2013
- Deep fracture fluids isolated in the crust since the Precambrian era. Nature Nature: New biology. 497:357-360. 2013
- Assessing microbial carbon sources and potential PAH degradation using natural abundance 14C analysis. Environmental Pollution. 175:125-130. 2013
- Assessing Limitations for PAH Biodegradation in Long-Term Contaminated Soils Using Bioaccessibility Assays. Water, Air, and Soil Pollution Water, Air, and Soil Pollution: Focus. 224. 2013
- Arctic gypsum endoliths: a biogeochemical characterization of a viable and active microbial community. Biogeosciences. 10:7661-7675. 2013
- A carbon free filter for collection of large volume samples of cellular biomass from oligotrophic waters. Journal of Microbiological Methods. 90:145-151. 2012
- Sources of n-alkanes in an urbanized estuary: Insights from molecular distributions and compound-specific stable and radiocarbon isotopes. Marine Chemistry. 126:239-249. 2011
- Comparison of commercial DNA extraction kits for isolation and purification of bacterial and eukaryotic DNA from PAH-contaminated soils. Canadian Journal of Microbiology. 57:623-628. 2011
- Origin and Evolution of Prebiotic Organic Matter As Inferred from the Tagish Lake Meteorite. Science The Scientific monthly. 332:1304-1307. 2011
- A historical overview of the Pavilion Lake Research Project-Analog science and exploration in an underwater environment. Special Paper of the Geological Society of America. 483:85-115. 2011
- A NEW METHOD FOR EXTRACTION, ISOLATION AND TRANSESTERIFICATION OF FREE FATTY ACIDS FROM ARCHAEOLOGICAL POTTERY. Archaeometry. 52:833-854. 2010
- Assessing Microbial Uptake of Petroleum Hydrocarbons in Groundwater Systems Using Natural Abundance Radiocarbon. Environmental Science & Technology. 44:5092-5097. 2010
- Microbial carbon cycling in oligotrophic regional aquifers near the Tono Uranium Mine, Japan as inferred from δ13C and Δ14C values of in situ phospholipid fatty acids and carbon sources. Geochmica et Cosmochimica Acta. 74:3785-3805. 2010
- Photosynthetic isotope biosignatures in laminated micro-stromatolitic and non-laminated nodules associated with modern, freshwater microbialites in Pavilion Lake, B.C.. Chemical Geology. 274:56-67. 2010
- Scientific field training for human planetary exploration. Planetary and Space Science. 58:920-930. 2010
- Determination of Microbial Carbon Sources and Cycling during Remediation of Petroleum Hydrocarbon Impacted Soil Using Natural Abundance 14C Analysis of PLFA. Environmental Science & Technology. 44:2322-2327. 2010
- Performance evaluation of underwater platforms in the context of space exploration. Planetary and Space Science. 58:706-716. 2010
- Constraining carbon sources and growth rates of freshwater microbialites in Pavilion Lake using14C analysis. Geobiology. 7:544-555. 2009
- International Year of Planet Earth 6. Biosignatures: Interpreting Evidence of the Origins and Diversity of Life. Geoscience Canada. 36:170-178. 2009
- Carbon isotope fractionation in phospholipid fatty acid biomarkers of bacteria and fungi native to an acid mine drainage lake. Organic Geochemistry. 40:956-962. 2009
- Subsistence practices and pottery use in Neolithic Jordan: molecular and isotopic evidence. Journal of Archaeological Science. 36:937-946. 2009
- Limnology of Pavilion Lake, B. C., Canada Characterization of a microbialite forming environment. Archiv f�r Hydrobiologie Fundamental and Applied Limnology. 173:329-351. 2009
- Isotopic signatures of CH4 and higher hydrocarbon gases from Precambrian Shield sites: A model for abiogenic polymerization of hydrocarbons. Geochmica et Cosmochimica Acta. 72:4778-4795. 2008
- Carbon isotope effects associated with Fenton-like degradation of toluene: Potential for differentiation of abiotic and biotic degradation. Science of the Total Environment. 401:194-198. 2008
- Variation in PAH inputs and microbial community in surface sediments of Hamilton Harbour: Implications to remediation and monitoring. Environmental Pollution. 153:60-70. 2008
- Intrinsic bacterial biodegradation of petroleum contamination demonstrated in situ using natural abundance, molecular-level 14C analysis. Organic Geochemistry. 37:981-989. 2006
- Evaluation of Isotopic Enrichment Factors for the Biodegradation of Chlorinated Ethenes Using a Parameter Estimation Model: Toward an Improved Quantification of Biodegradation. Environmental Science & Technology. 40:3886-3892. 2006
- Organic geochemical characterization of a Miocene core sample from Haughton impact structure, Devon Island, Nunavut, Canadian High Arctic. Organic Geochemistry. 37:688-710. 2006
- Unravelling abiogenic and biogenic sources of methane in the Earth's deep subsurface. Chemical Geology. 226:328-339. 2006
- Determination of Microbial Carbon Sources in Petroleum Contaminated Sediments Using Molecular 14C Analysis. Environmental Science & Technology. 39:2552-2558. 2005
- Quantifying chlorinated ethene degradation during reductive dechlorination at Kelly AFB using stable carbon isotopes. Journal of Contaminant Hydrology. 76:279-293. 2005
- The yield and isotopic composition of radiolytic H2, a potential energy source for the deep subsurface biosphere. Geochmica et Cosmochimica Acta. 69:893-903. 2005
- Carbon Isotope Fractionation of PCE and TCE During Dechlorination by Vitamin B12. Ground Water Monitoring and Remediation Ground Water Monitoring Review. 23:59-67. 2003
- Temporal Shifts in the Geochemistry and Microbial Community Structure of an Ultradeep Mine Borehole Following Isolation. Geomicrobiology Journal. 20:517-548. 2003
- Carbon isotope fractionation during reductive dechlorination of TCE in batch experiments with iron samples from reactive barriers. Journal of Contaminant Hydrology. 66:25-37. 2003
- Stable Isotope Forensics--When Isotopes Work. Environmental Forensics. 4:13-23. 2003
- Isotopic fractionation during reductive dechlorination of trichloroethene by zero-valent iron: influence of surface treatment. Chemosphere Chemosphere - Global Change Science. 49:587-596. 2002
- Abiogenic formation of alkanes in the Earth's crust as a minor source for global hydrocarbon reservoirs. Nature Nature: New biology. 416:522-524. 2002
- Carbon Isotope Fractionation during Aerobic Biodegradation of Trichloroethene by Burkholderia cepacia G4: a Tool To Map Degradation Mechanisms. Applied and Environmental Microbiology. 68:1728-1734. 2002
- Variability in Carbon Isotopic Fractionation during Biodegradation of Chlorinated Ethenes: Implications for Field Applications. Environmental Science & Technology. 35:901-907. 2001
- Stable Carbon Isotope Evidence for Intrinsic Bioremediation of Tetrachloroethene and Trichloroethene at Area 6, Dover Air Force Base. Environmental Science & Technology. 35:261-269. 2001
- Carbon Isotope Effects Resulting from Equilibrium Sorption of Dissolved VOCs. Analytical Chemistry Industrial and Engineering Chemistry Analytical Edition. 72:5669-5672. 2000
- Hydrogen Isotope Fractionation during Methanogenic Degradation of Toluene: Potential for Direct Verification of Bioremediation. Environmental Science & Technology. 34:4577-4581. 2000
- Carbon Isotope Fractionation during Anaerobic Biodegradation of Toluene: Implications for Intrinsic Bioremediation. Environmental Science & Technology. 34:892-896. 2000
- Contrasting carbon isotope fractionation during biodegradation of trichloroethylene and toluene: Implications for intrinsic bioremediation. Organic Geochemistry. 30:813-820. 1999
- Headspace Analysis: A New Application for Isotopic Characterization of Dissolved Organic Contaminants. Environmental Science & Technology. 33:190-194. 1999
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conference paper
- MONOCARBOXYLIC ACIDS IN THE TAGISH LAKE METEORITE: INSIGHTS INTO THE ROLE OF PARENT BODY PROCESSING. Meteoritics and Planetary Science. A79-A79. 2010
- Nitrogen in the Canadian Shield: Resolving abiotic contributions and biological cycling. Geochmica et Cosmochimica Acta. A591-A591. 2010
- The deep 'cool' terrestrial biosphere-fracture waters and dissolved gases at > 2.5 km in the Canadian Shield. Geochmica et Cosmochimica Acta. A1209-A1209. 2009
- Ancient analogs for ultramafic-hosted vents: Water-rock-derived energy for deep subsurface chemosynthesis. Geochmica et Cosmochimica Acta. A648-A648. 2008
- Isotopic biosignatures associated with freshwater microbialites and carbonate precipitating microbial mats. Geochmica et Cosmochimica Acta. A109-A109. 2008
- Molecular and isotopic characterization of n-alkanes in a humic-rich, urbanised estuary. Geochmica et Cosmochimica Acta. A8-A8. 2008
- PAH concentration and delta C-13 trends in sediments receiving long-range atmospheric deposition. Geochmica et Cosmochimica Acta. A74-A74. 2008
- Stable carbon isotope fractionation in sulfur oxidizing and heterotrophic bacteria native to an acid mine tailings pond. Geochmica et Cosmochimica Acta. A186-A186. 2008
- Constraining carbon sources and growth of microbialites in Pavilion Lake, BC using C-14. Geochmica et Cosmochimica Acta. A948-A948. 2007
- 14C in Methane and DIC in the Deep Terrestrial Subsurface: Implications for Microbial Methanogenesis. Handbook of Environmental Chemistry, Volume 5: Water Pollution. 453-462. 2006
- The Origin and Age of Biogeochemical Trends in Deep Fracture Water of the Witwatersrand Basin, South Africa. Handbook of Environmental Chemistry, Volume 5: Water Pollution. 369-414. 2006
- Compound specific isotope analysis and the challenge for identifying life: The role of biosignatures and abiosignatures. Geochmica et Cosmochimica Acta. A582-A582. 2006
- Assessing bioavailability and microbial metabolism in situ using natural abundance molecular 14-C analysis. ACS National Meeting Book of Abstracts. U1789-U1789. 2005
- Abiogenic gases, H2 autotrophy and methanogenesis in the deep subsurface.. ACS National Meeting Book of Abstracts. U888-U888. 2005
- Microbial hydrocarbon gases in the Witwatersrand Basin, South Africa: Implications for the deep biosphere. Geochmica et Cosmochimica Acta. 3239-3250. 2004
- Impact of petroleum contamination on bacterial phospholipids in a salt marsh core. ACS Division of Environmental Chemistry, Preprints. 255-258. 2002
- Impact of petroleum contamination on bacterial phospholipids in a salt marsh core.. ACS National Meeting Book of Abstracts. U520-U520. 2002
- Hydrogen and hydrocarbon gases in crystalline rock: Implications for the deep biosphere. Geochmica et Cosmochimica Acta. A706-A706. 2002
- Compound specific hydrogen isotope analysis: New insights into geochemical and biogeochemical reaction mechanisms.. ACS National Meeting Book of Abstracts. U534-U535. 2001
- Carbon isotopic fractionation of chlorinated ethenes during biodegradation: Field applications. NATURAL ATTENUATION CONSIDERATIONS AND CASE STUDIES. 17-24. 2000
- Changes of the carbon isotopic composition of trichloroethylene during aerobic biodegradation: a new tool to estimate removal efficiencies. GROUNDWATER 2000. 229-230. 2000
- Isotopic tracers of degradation of dissolved chlorinated solvents. FIRST INTERNATIONAL CONFERENCE ON REMEDIATION OF CHLORINATED AND RECALCITRANT COMPOUNDS, VOL 3. 133-138. 1998