University of Saskatchewan

Adjunct Professor, Geological Sciences

Joyce worked at University of Saskatchewan as a Adjunct Professor, Geological Sciences

University of Saskatchewan

Assistant Professor, Geological Sciences

As an Assistant Professor at USask, I teach and conduct research on microbial interactions with the geosphere. I am specifically interested in metal(loid) and hydrocarbon contaminant remediation, metal transformations mediated by microbes in mine wastes, and metal biosignatures in fossils. My projects included studies of uranium mine tailings and ores, oil sands tailings, groundwater treatment for elevated Mn and Fe, saline/freshwater gradient microbiology, and metals in trace fossils. I teach physical geology (1st year course), introductory geomicrobiology (3rd year course), and I've assisted with hard and soft rock field schools. I'm heavily involved in three open textbook projects for our first year physical geology course.

Bigelow Laboratory for Ocean Sciences

Postdoctoral Researcher

Investigating marine corrosion communities and the influence of iron-oxidizing bacteria on steel corrosion. Isolated GSB-2, the first example of a Zetaproterobacterium isolated in a near-shore environment.

University of Manchester

Part-time postdoc

undergrad project supervision, lipid extraction and biosignature analyses

Klohn Crippen Berger

Field Geoscientist in Training

hydrocarbon contaminated site remediation, supervising tank pulls and installations, supervising contractors.

Canadian Light Source Inc.

Staff Scientist - Earth & Environment

In my work at CLS, I conducting research on topics relating to sustainable mine waste studies - specifically metal(loid) contaminant remediation and metal transformations mediated by microbes in mine wastes. My projects included studies of uranium mine tailings and ores, oil sands tailings, groundwater treatment for elevated Mn and Fe, potash mine wastewater, and constructed wetland treatment systems.

Hartnell's time machine: 170-year-old nails reveal severe zinc deficiency played a greater role than lead in the demise of the Franklin Expedition

Journal of Archaeological Science: Reports

The Franklin Expedition (1845–1848) left in search of the Northwest Passage and ended tragically with the loss of all crew members. Mystery surrounds their ultimate fate, with particular speculation around the role of lead poisoning. Our unique study turns nails from crew member John Hartnell into a time machine to determine what happened to the Franklin Expedition crew members. Using micro-X-ray fluorescence mapping, stable isotopic measurements, and laser ablation inductively coupled plasma mass spectrometry, we navigate through the nails and temporally characterize lead, copper and zinc content in our subject during the early expedition. By circumventing external contamination on exposed nail surfaces, we challenge the theory that crew members were exposed to high levels of lead on the expedition. Our analyses suggest that lead exposure actually decreased over the course of the expedition and Hartnell's levels were within a healthy, normal range. Our study also finds, however, that Hartnell was severely zinc-deficient, possibly leading to immuno-suppression and ultimately, tuberculosis and death. The significant weight loss from his illness resulted in a flush of previously stored lead from his bones into his blood (and nail), but only in the last few weeks of life.

Hartnell's time machine: 170-year-old nails reveal severe zinc deficiency played a greater role than lead in the demise of the Franklin Expedition

Journal of Archaeological Science: Reports

The Franklin Expedition (1845–1848) left in search of the Northwest Passage and ended tragically with the loss of all crew members. Mystery surrounds their ultimate fate, with particular speculation around the role of lead poisoning. Our unique study turns nails from crew member John Hartnell into a time machine to determine what happened to the Franklin Expedition crew members. Using micro-X-ray fluorescence mapping, stable isotopic measurements, and laser ablation inductively coupled plasma mass spectrometry, we navigate through the nails and temporally characterize lead, copper and zinc content in our subject during the early expedition. By circumventing external contamination on exposed nail surfaces, we challenge the theory that crew members were exposed to high levels of lead on the expedition. Our analyses suggest that lead exposure actually decreased over the course of the expedition and Hartnell's levels were within a healthy, normal range. Our study also finds, however, that Hartnell was severely zinc-deficient, possibly leading to immuno-suppression and ultimately, tuberculosis and death. The significant weight loss from his illness resulted in a flush of previously stored lead from his bones into his blood (and nail), but only in the last few weeks of life.

Hartnell's time machine: 170-year-old nails reveal severe zinc deficiency played a greater role than lead in the demise of the Franklin Expedition

Journal of Archaeological Science: Reports

The Franklin Expedition (1845–1848) left in search of the Northwest Passage and ended tragically with the loss of all crew members. Mystery surrounds their ultimate fate, with particular speculation around the role of lead poisoning. Our unique study turns nails from crew member John Hartnell into a time machine to determine what happened to the Franklin Expedition crew members. Using micro-X-ray fluorescence mapping, stable isotopic measurements, and laser ablation inductively coupled plasma mass spectrometry, we navigate through the nails and temporally characterize lead, copper and zinc content in our subject during the early expedition. By circumventing external contamination on exposed nail surfaces, we challenge the theory that crew members were exposed to high levels of lead on the expedition. Our analyses suggest that lead exposure actually decreased over the course of the expedition and Hartnell's levels were within a healthy, normal range. Our study also finds, however, that Hartnell was severely zinc-deficient, possibly leading to immuno-suppression and ultimately, tuberculosis and death. The significant weight loss from his illness resulted in a flush of previously stored lead from his bones into his blood (and nail), but only in the last few weeks of life.

An X-ray absorption study of the fate of technetium in reduced and reoxidised sediments and mineral phases

Applied Geochemistry

Hartnell's time machine: 170-year-old nails reveal severe zinc deficiency played a greater role than lead in the demise of the Franklin Expedition

Journal of Archaeological Science: Reports

The Franklin Expedition (1845–1848) left in search of the Northwest Passage and ended tragically with the loss of all crew members. Mystery surrounds their ultimate fate, with particular speculation around the role of lead poisoning. Our unique study turns nails from crew member John Hartnell into a time machine to determine what happened to the Franklin Expedition crew members. Using micro-X-ray fluorescence mapping, stable isotopic measurements, and laser ablation inductively coupled plasma mass spectrometry, we navigate through the nails and temporally characterize lead, copper and zinc content in our subject during the early expedition. By circumventing external contamination on exposed nail surfaces, we challenge the theory that crew members were exposed to high levels of lead on the expedition. Our analyses suggest that lead exposure actually decreased over the course of the expedition and Hartnell's levels were within a healthy, normal range. Our study also finds, however, that Hartnell was severely zinc-deficient, possibly leading to immuno-suppression and ultimately, tuberculosis and death. The significant weight loss from his illness resulted in a flush of previously stored lead from his bones into his blood (and nail), but only in the last few weeks of life.

An X-ray absorption study of the fate of technetium in reduced and reoxidised sediments and mineral phases

Applied Geochemistry

In Situ Microbial Community Succession on Mild Steel in Estuarine and Marine Environments: Exploring the Role of Iron-Oxidizing Bacteria

Frontiers in Microbiology

This work indicates there is a successional pattern in the colonization of steel surfaces and iron oxidizing bacteria are early colonizers; over time the MIC community matures to include other members that may help accelerate corrosion. This work also shows there is a reservoir for Zetaproteobacteria in coastal sediment habitats, where they may influence the coastal iron cycle, and can rapidly colonize steel surfaces or other sources of Fe(II) when available.

Hartnell's time machine: 170-year-old nails reveal severe zinc deficiency played a greater role than lead in the demise of the Franklin Expedition

Journal of Archaeological Science: Reports

The Franklin Expedition (1845–1848) left in search of the Northwest Passage and ended tragically with the loss of all crew members. Mystery surrounds their ultimate fate, with particular speculation around the role of lead poisoning. Our unique study turns nails from crew member John Hartnell into a time machine to determine what happened to the Franklin Expedition crew members. Using micro-X-ray fluorescence mapping, stable isotopic measurements, and laser ablation inductively coupled plasma mass spectrometry, we navigate through the nails and temporally characterize lead, copper and zinc content in our subject during the early expedition. By circumventing external contamination on exposed nail surfaces, we challenge the theory that crew members were exposed to high levels of lead on the expedition. Our analyses suggest that lead exposure actually decreased over the course of the expedition and Hartnell's levels were within a healthy, normal range. Our study also finds, however, that Hartnell was severely zinc-deficient, possibly leading to immuno-suppression and ultimately, tuberculosis and death. The significant weight loss from his illness resulted in a flush of previously stored lead from his bones into his blood (and nail), but only in the last few weeks of life.

An X-ray absorption study of the fate of technetium in reduced and reoxidised sediments and mineral phases

Applied Geochemistry

In Situ Microbial Community Succession on Mild Steel in Estuarine and Marine Environments: Exploring the Role of Iron-Oxidizing Bacteria

Frontiers in Microbiology

This work indicates there is a successional pattern in the colonization of steel surfaces and iron oxidizing bacteria are early colonizers; over time the MIC community matures to include other members that may help accelerate corrosion. This work also shows there is a reservoir for Zetaproteobacteria in coastal sediment habitats, where they may influence the coastal iron cycle, and can rapidly colonize steel surfaces or other sources of Fe(II) when available.

Towards the insitu remediation of radioactive waste; probing the biogeochemical behaviour of technetium using a novel nuclear imaging technique.

Environmental Science and Technology 44 (11): 156-162.

In this manuscript we describe experiments we did using gamma camera imaging and the short-lived isotope Tc-99m (T 1/2 = 6.5 hrs) to investigate movement of pM concentrations of Tc through columns of sediment from the Oak Ridge Field Research Center Field Site.

Hartnell's time machine: 170-year-old nails reveal severe zinc deficiency played a greater role than lead in the demise of the Franklin Expedition

Journal of Archaeological Science: Reports

The Franklin Expedition (1845–1848) left in search of the Northwest Passage and ended tragically with the loss of all crew members. Mystery surrounds their ultimate fate, with particular speculation around the role of lead poisoning. Our unique study turns nails from crew member John Hartnell into a time machine to determine what happened to the Franklin Expedition crew members. Using micro-X-ray fluorescence mapping, stable isotopic measurements, and laser ablation inductively coupled plasma mass spectrometry, we navigate through the nails and temporally characterize lead, copper and zinc content in our subject during the early expedition. By circumventing external contamination on exposed nail surfaces, we challenge the theory that crew members were exposed to high levels of lead on the expedition. Our analyses suggest that lead exposure actually decreased over the course of the expedition and Hartnell's levels were within a healthy, normal range. Our study also finds, however, that Hartnell was severely zinc-deficient, possibly leading to immuno-suppression and ultimately, tuberculosis and death. The significant weight loss from his illness resulted in a flush of previously stored lead from his bones into his blood (and nail), but only in the last few weeks of life.

An X-ray absorption study of the fate of technetium in reduced and reoxidised sediments and mineral phases

Applied Geochemistry

In Situ Microbial Community Succession on Mild Steel in Estuarine and Marine Environments: Exploring the Role of Iron-Oxidizing Bacteria

Frontiers in Microbiology

This work indicates there is a successional pattern in the colonization of steel surfaces and iron oxidizing bacteria are early colonizers; over time the MIC community matures to include other members that may help accelerate corrosion. This work also shows there is a reservoir for Zetaproteobacteria in coastal sediment habitats, where they may influence the coastal iron cycle, and can rapidly colonize steel surfaces or other sources of Fe(II) when available.

Towards the insitu remediation of radioactive waste; probing the biogeochemical behaviour of technetium using a novel nuclear imaging technique.

Environmental Science and Technology 44 (11): 156-162.

In this manuscript we describe experiments we did using gamma camera imaging and the short-lived isotope Tc-99m (T 1/2 = 6.5 hrs) to investigate movement of pM concentrations of Tc through columns of sediment from the Oak Ridge Field Research Center Field Site.

Technetium reduction and reoxidation in aquifer sediments

Geomicrobiology Journal 23: 1-9.

In this manuscript we summarize results from Tc spiked progressive sediment microcosm experiments. We examining the redox and coordination environment of Tc in parallel samples analyzed using EXAFS. The sediment used in these experiments was from the Oak Ridge National Lab Field Research Center Site.

Hartnell's time machine: 170-year-old nails reveal severe zinc deficiency played a greater role than lead in the demise of the Franklin Expedition

Journal of Archaeological Science: Reports

The Franklin Expedition (1845–1848) left in search of the Northwest Passage and ended tragically with the loss of all crew members. Mystery surrounds their ultimate fate, with particular speculation around the role of lead poisoning. Our unique study turns nails from crew member John Hartnell into a time machine to determine what happened to the Franklin Expedition crew members. Using micro-X-ray fluorescence mapping, stable isotopic measurements, and laser ablation inductively coupled plasma mass spectrometry, we navigate through the nails and temporally characterize lead, copper and zinc content in our subject during the early expedition. By circumventing external contamination on exposed nail surfaces, we challenge the theory that crew members were exposed to high levels of lead on the expedition. Our analyses suggest that lead exposure actually decreased over the course of the expedition and Hartnell's levels were within a healthy, normal range. Our study also finds, however, that Hartnell was severely zinc-deficient, possibly leading to immuno-suppression and ultimately, tuberculosis and death. The significant weight loss from his illness resulted in a flush of previously stored lead from his bones into his blood (and nail), but only in the last few weeks of life.

An X-ray absorption study of the fate of technetium in reduced and reoxidised sediments and mineral phases

Applied Geochemistry

In Situ Microbial Community Succession on Mild Steel in Estuarine and Marine Environments: Exploring the Role of Iron-Oxidizing Bacteria

Frontiers in Microbiology

This work indicates there is a successional pattern in the colonization of steel surfaces and iron oxidizing bacteria are early colonizers; over time the MIC community matures to include other members that may help accelerate corrosion. This work also shows there is a reservoir for Zetaproteobacteria in coastal sediment habitats, where they may influence the coastal iron cycle, and can rapidly colonize steel surfaces or other sources of Fe(II) when available.

Towards the insitu remediation of radioactive waste; probing the biogeochemical behaviour of technetium using a novel nuclear imaging technique.

Environmental Science and Technology 44 (11): 156-162.

In this manuscript we describe experiments we did using gamma camera imaging and the short-lived isotope Tc-99m (T 1/2 = 6.5 hrs) to investigate movement of pM concentrations of Tc through columns of sediment from the Oak Ridge Field Research Center Field Site.

Technetium reduction and reoxidation in aquifer sediments

Geomicrobiology Journal 23: 1-9.

In this manuscript we summarize results from Tc spiked progressive sediment microcosm experiments. We examining the redox and coordination environment of Tc in parallel samples analyzed using EXAFS. The sediment used in these experiments was from the Oak Ridge National Lab Field Research Center Site.

Reoxidation behaviour of technetium, iron, and sulfur in estuarine sediments

Environmental Science & Technology

Hartnell's time machine: 170-year-old nails reveal severe zinc deficiency played a greater role than lead in the demise of the Franklin Expedition

Journal of Archaeological Science: Reports

The Franklin Expedition (1845–1848) left in search of the Northwest Passage and ended tragically with the loss of all crew members. Mystery surrounds their ultimate fate, with particular speculation around the role of lead poisoning. Our unique study turns nails from crew member John Hartnell into a time machine to determine what happened to the Franklin Expedition crew members. Using micro-X-ray fluorescence mapping, stable isotopic measurements, and laser ablation inductively coupled plasma mass spectrometry, we navigate through the nails and temporally characterize lead, copper and zinc content in our subject during the early expedition. By circumventing external contamination on exposed nail surfaces, we challenge the theory that crew members were exposed to high levels of lead on the expedition. Our analyses suggest that lead exposure actually decreased over the course of the expedition and Hartnell's levels were within a healthy, normal range. Our study also finds, however, that Hartnell was severely zinc-deficient, possibly leading to immuno-suppression and ultimately, tuberculosis and death. The significant weight loss from his illness resulted in a flush of previously stored lead from his bones into his blood (and nail), but only in the last few weeks of life.

An X-ray absorption study of the fate of technetium in reduced and reoxidised sediments and mineral phases

Applied Geochemistry

In Situ Microbial Community Succession on Mild Steel in Estuarine and Marine Environments: Exploring the Role of Iron-Oxidizing Bacteria

Frontiers in Microbiology

This work indicates there is a successional pattern in the colonization of steel surfaces and iron oxidizing bacteria are early colonizers; over time the MIC community matures to include other members that may help accelerate corrosion. This work also shows there is a reservoir for Zetaproteobacteria in coastal sediment habitats, where they may influence the coastal iron cycle, and can rapidly colonize steel surfaces or other sources of Fe(II) when available.

Towards the insitu remediation of radioactive waste; probing the biogeochemical behaviour of technetium using a novel nuclear imaging technique.

Environmental Science and Technology 44 (11): 156-162.

In this manuscript we describe experiments we did using gamma camera imaging and the short-lived isotope Tc-99m (T 1/2 = 6.5 hrs) to investigate movement of pM concentrations of Tc through columns of sediment from the Oak Ridge Field Research Center Field Site.

Technetium reduction and reoxidation in aquifer sediments

Geomicrobiology Journal 23: 1-9.

In this manuscript we summarize results from Tc spiked progressive sediment microcosm experiments. We examining the redox and coordination environment of Tc in parallel samples analyzed using EXAFS. The sediment used in these experiments was from the Oak Ridge National Lab Field Research Center Site.

Reoxidation behaviour of technetium, iron, and sulfur in estuarine sediments

Environmental Science & Technology

Neutrophilic Iron-Oxidizing "Zetaproteobacteria" and Mild Steel Corrosion in Nearshore Marine Environments

Appl Env Microbio

I isolated a new marine iron-oxidizing bacterium, Mariprofundus sp Strain GSB2 that enhanced uniform corrosion from mild steel in laboratory microcosm experiments. These results have important implications for the role of FeOB in corrosion of steel in nearshore and estuarine environments. In addition, this work shows that the global distribution of Zetaproteobacteria is far greater than previously thought.

Free Flow Dance Theatre

Member, Board of Directors

Free Flow Dance Theatre

Member, Board of Directors

Association of Professional Engineers and Geoscientists of Saskatchewan (APEGS)

Geoscientist-In-Training

Free Flow Dance Theatre

Member, Board of Directors

Association of Professional Engineers and Geoscientists of Saskatchewan (APEGS)

Geoscientist-In-Training

Free Flow Dance Theatre

Member, Board of Directors

Association of Professional Engineers and Geoscientists of Saskatchewan (APEGS)

Geoscientist-In-Training

Free Flow Dance Theatre

Member, Board of Directors

Association of Professional Engineers and Geoscientists of Saskatchewan (APEGS)

Geoscientist-In-Training

Free Flow Dance Theatre

Member, Board of Directors

Association of Professional Engineers and Geoscientists of Saskatchewan (APEGS)

Geoscientist-In-Training

Free Flow Dance Theatre

Member, Board of Directors

Association of Professional Engineers and Geoscientists of Saskatchewan (APEGS)

Geoscientist-In-Training

Free Flow Dance Theatre

Member, Board of Directors

Association of Professional Engineers and Geoscientists of Saskatchewan (APEGS)

Geoscientist-In-Training

Free Flow Dance Theatre

Member, Board of Directors

Association of Professional Engineers and Geoscientists of Saskatchewan (APEGS)

Geoscientist-In-Training

Free Flow Dance Theatre

Member, Board of Directors

Association of Professional Engineers and Geoscientists of Saskatchewan (APEGS)

Geoscientist-In-Training

Free Flow Dance Theatre

Member, Board of Directors

Association of Professional Engineers and Geoscientists of Saskatchewan (APEGS)

Geoscientist-In-Training

Free Flow Dance Theatre

Member, Board of Directors

Association of Professional Engineers and Geoscientists of Saskatchewan (APEGS)

Geoscientist-In-Training

Free Flow Dance Theatre

Member, Board of Directors

Association of Professional Engineers and Geoscientists of Saskatchewan (APEGS)

Geoscientist-In-Training

Free Flow Dance Theatre

Member, Board of Directors

Association of Professional Engineers and Geoscientists of Saskatchewan (APEGS)

Geoscientist-In-Training

Free Flow Dance Theatre

Member, Board of Directors

Association of Professional Engineers and Geoscientists of Saskatchewan (APEGS)

Geoscientist-In-Training