The sun rises over snow covered pine trees at the Alaska Peatland Experiment (APEX) study site near Fairbanks, Alaska.
Jack McFarland
Jack is a Biologist with the Geology, Minerals, Energy, and Geophysics Science Center
Science and Products
Increasing Giant Sequoia Reforestation Success after Catastrophic Wildfire Using Soil and Microbial Indicators
Response of plant, microbial, and soil functions to drought and fire in California
Arctic Biogeochemical Response to Permafrost Thaw (ABRUPT)
Depth to frozen soil measurements at APEX, 2008-2023 Depth to frozen soil measurements at APEX, 2008-2023
Abiotic sorption of glucose, glutamic acid, hydroxybenzoic acid, and oxalic acid onto amorphous aluminum hydroxide, feldspar, ferrihydrite, and kaolinite Abiotic sorption of glucose, glutamic acid, hydroxybenzoic acid, and oxalic acid onto amorphous aluminum hydroxide, feldspar, ferrihydrite, and kaolinite
Short vs intermediate-term fate of glucose and oxalic acid in surface and subsurface soils of a coastal grassland near Santa Cruz California Short vs intermediate-term fate of glucose and oxalic acid in surface and subsurface soils of a coastal grassland near Santa Cruz California
Permafrost greenhouse gas and microbial data from the Alaska Peatland Experiment (APEX) 2017 to 2019 Permafrost greenhouse gas and microbial data from the Alaska Peatland Experiment (APEX) 2017 to 2019
Permafrost characterization at the Alaska Peatland Experiment (APEX) site: Geophysical and related field data collected from 2018-2020 Permafrost characterization at the Alaska Peatland Experiment (APEX) site: Geophysical and related field data collected from 2018-2020
Microbial Carbon and Nitrogen Metabolism Across a Late Pleistocene Permafrost Chronosequence Microbial Carbon and Nitrogen Metabolism Across a Late Pleistocene Permafrost Chronosequence
Batch sorption data, respired CO2, extractable DOC, and Raman spectra collected from an incubation with microbial necromass on feldspar or amorphous aluminum hydroxide Batch sorption data, respired CO2, extractable DOC, and Raman spectra collected from an incubation with microbial necromass on feldspar or amorphous aluminum hydroxide
The sun rises over snow covered pine trees at the Alaska Peatland Experiment (APEX) study site near Fairbanks, Alaska.
Young bog complex in winter at the Alaska Peatland Experiment (APEX) study site.
Young bog complex in winter at the Alaska Peatland Experiment (APEX) study site.
A cross section of ice-rich permafrost. Layers and areas of sediments are interspersed with frozen patches of ice.
A cross section of ice-rich permafrost. Layers and areas of sediments are interspersed with frozen patches of ice.
A USGS scientist testing drone technology to measure methane fluxes from thawing permafrost.
A USGS scientist testing drone technology to measure methane fluxes from thawing permafrost.
A scientist wearing a mask, safety googles, and a cap breaks down a permafrost core using a paring knife to conduct aseptic sampling for DNA analysis.
A scientist wearing a mask, safety googles, and a cap breaks down a permafrost core using a paring knife to conduct aseptic sampling for DNA analysis.
The effect of drying boreal lakes on plants, soils, and microbial communities in lake margin habitats The effect of drying boreal lakes on plants, soils, and microbial communities in lake margin habitats
Permafrost microbial communities and functional genes are structured by latitudinal and soil geochemical gradients Permafrost microbial communities and functional genes are structured by latitudinal and soil geochemical gradients
The influence of soil development on the depth distribution and structure of soil microbial communities. The influence of soil development on the depth distribution and structure of soil microbial communities.
Mechanisms for retention of low molecular weight organic carbon varies with soil depth at a coastal prairie ecosystem Mechanisms for retention of low molecular weight organic carbon varies with soil depth at a coastal prairie ecosystem
The biophysical role of water and ice within permafrost nearing collapse: Insights from novel geophysical observations The biophysical role of water and ice within permafrost nearing collapse: Insights from novel geophysical observations
Carbon fluxes and microbial activities from boreal peatlands experiencing permafrost thaw Carbon fluxes and microbial activities from boreal peatlands experiencing permafrost thaw
Life at the frozen limit: Microbial carbon metabolism across a Late Pleistocene permafrost chronosequence Life at the frozen limit: Microbial carbon metabolism across a Late Pleistocene permafrost chronosequence
Geese mediate vegetation state changes with parallel effects on N cycling that leave nutritional legacies for offspring Geese mediate vegetation state changes with parallel effects on N cycling that leave nutritional legacies for offspring
Large loss of CO2 in winter observed across pan-arctic permafrost region Large loss of CO2 in winter observed across pan-arctic permafrost region
Mineralogy dictates the initial mechanism of microbial necromass association Mineralogy dictates the initial mechanism of microbial necromass association
Biological and mineralogical controls over cycling of low molecular weight organic compounds along a soil chronosequence Biological and mineralogical controls over cycling of low molecular weight organic compounds along a soil chronosequence
Warming effects of spring rainfall increase methane emissions from thawing permafrost Warming effects of spring rainfall increase methane emissions from thawing permafrost
Science and Products
Increasing Giant Sequoia Reforestation Success after Catastrophic Wildfire Using Soil and Microbial Indicators
Response of plant, microbial, and soil functions to drought and fire in California
Arctic Biogeochemical Response to Permafrost Thaw (ABRUPT)
Depth to frozen soil measurements at APEX, 2008-2023 Depth to frozen soil measurements at APEX, 2008-2023
Abiotic sorption of glucose, glutamic acid, hydroxybenzoic acid, and oxalic acid onto amorphous aluminum hydroxide, feldspar, ferrihydrite, and kaolinite Abiotic sorption of glucose, glutamic acid, hydroxybenzoic acid, and oxalic acid onto amorphous aluminum hydroxide, feldspar, ferrihydrite, and kaolinite
Short vs intermediate-term fate of glucose and oxalic acid in surface and subsurface soils of a coastal grassland near Santa Cruz California Short vs intermediate-term fate of glucose and oxalic acid in surface and subsurface soils of a coastal grassland near Santa Cruz California
Permafrost greenhouse gas and microbial data from the Alaska Peatland Experiment (APEX) 2017 to 2019 Permafrost greenhouse gas and microbial data from the Alaska Peatland Experiment (APEX) 2017 to 2019
Permafrost characterization at the Alaska Peatland Experiment (APEX) site: Geophysical and related field data collected from 2018-2020 Permafrost characterization at the Alaska Peatland Experiment (APEX) site: Geophysical and related field data collected from 2018-2020
Microbial Carbon and Nitrogen Metabolism Across a Late Pleistocene Permafrost Chronosequence Microbial Carbon and Nitrogen Metabolism Across a Late Pleistocene Permafrost Chronosequence
Batch sorption data, respired CO2, extractable DOC, and Raman spectra collected from an incubation with microbial necromass on feldspar or amorphous aluminum hydroxide Batch sorption data, respired CO2, extractable DOC, and Raman spectra collected from an incubation with microbial necromass on feldspar or amorphous aluminum hydroxide
The sun rises over snow covered pine trees at the Alaska Peatland Experiment (APEX) study site near Fairbanks, Alaska.
The sun rises over snow covered pine trees at the Alaska Peatland Experiment (APEX) study site near Fairbanks, Alaska.
Young bog complex in winter at the Alaska Peatland Experiment (APEX) study site.
Young bog complex in winter at the Alaska Peatland Experiment (APEX) study site.
A cross section of ice-rich permafrost. Layers and areas of sediments are interspersed with frozen patches of ice.
A cross section of ice-rich permafrost. Layers and areas of sediments are interspersed with frozen patches of ice.
A USGS scientist testing drone technology to measure methane fluxes from thawing permafrost.
A USGS scientist testing drone technology to measure methane fluxes from thawing permafrost.
A scientist wearing a mask, safety googles, and a cap breaks down a permafrost core using a paring knife to conduct aseptic sampling for DNA analysis.
A scientist wearing a mask, safety googles, and a cap breaks down a permafrost core using a paring knife to conduct aseptic sampling for DNA analysis.