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
Recent catastrophic droughts and wildfires have killed almost 20% of mature giant sequoia trees across California, and it is uncertain whether natural seedling regeneration will be enough to restore these forests, especially in severely burned areas. Researchers supported by this Southwest CASC project will assess whether soil conditions, such as moisture and soil microbial communities...
Response of plant, microbial, and soil functions to drought and fire in California
California is experiencing changes in precipitation and wildfire regimes. Longer, hotter fire seasons along with extremes in precipitation are expected to continue. Not only do these disturbances affect the productivity and resilience of ecosystems, they also directly impact human health and wellbeing. Soils hold an immense amount of our terrestrial carbon pool, and the microorganisms and minerals...
Arctic Biogeochemical Response to Permafrost Thaw (ABRUPT)
Warming and thawing of permafrost soils in the Arctic is expected to become widespread over the coming decades. Permafrost thaw changes ecosystem structure and function, affects resource availability for wildlife and society, and decreases ground stability which affects human infrastructure. Since permafrost soils contain about half of the global soil carbon (C) pool, the magnitude of C losses...
Winter Sunrise at APEX
The sun rises over snow covered pine trees at the Alaska Peatland Experiment (APEX) study site near Fairbanks, Alaska.
Young Bog in Winter
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.
Ice-rich Permafrost
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.
Testing Drone Technology
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.
Aseptic Sampling of a Permafrost Core
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.
Science and Products
Increasing Giant Sequoia Reforestation Success after Catastrophic Wildfire Using Soil and Microbial Indicators
Recent catastrophic droughts and wildfires have killed almost 20% of mature giant sequoia trees across California, and it is uncertain whether natural seedling regeneration will be enough to restore these forests, especially in severely burned areas. Researchers supported by this Southwest CASC project will assess whether soil conditions, such as moisture and soil microbial communities...
Response of plant, microbial, and soil functions to drought and fire in California
California is experiencing changes in precipitation and wildfire regimes. Longer, hotter fire seasons along with extremes in precipitation are expected to continue. Not only do these disturbances affect the productivity and resilience of ecosystems, they also directly impact human health and wellbeing. Soils hold an immense amount of our terrestrial carbon pool, and the microorganisms and minerals...
Arctic Biogeochemical Response to Permafrost Thaw (ABRUPT)
Warming and thawing of permafrost soils in the Arctic is expected to become widespread over the coming decades. Permafrost thaw changes ecosystem structure and function, affects resource availability for wildlife and society, and decreases ground stability which affects human infrastructure. Since permafrost soils contain about half of the global soil carbon (C) pool, the magnitude of C losses...
Winter Sunrise at APEX
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 in Winter
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.
Ice-rich Permafrost
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.
Testing Drone Technology
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.
Aseptic Sampling of a Permafrost Core
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.