Jennifer Harden, PhD (Former Employee)
Science and Products
Filter Total Items: 144
Effects of experimental water table and temperature manipulations on ecosystem CO2 fluxes in an Alaskan rich fen Effects of experimental water table and temperature manipulations on ecosystem CO2 fluxes in an Alaskan rich fen
Peatlands store 30% of the world's terrestrial soil carbon (C) and those located at northern latitudes are expected to experience rapid climate warming. We monitored growing season carbon dioxide (CO2) fluxes across a factorial design of in situ water table (control, drought, and flooded plots) and soil warming (control vs. warming via open top chambers) treatments for 2 years in a rich...
Authors
M.R. Chivers, M.R. Turetsky, J. M. Waddington, J.W. Harden, A. D. McGuire
Interactive effects of fire, soil climate, and moss on CO2 fluxes in black spruce ecosystems of interior Alaska Interactive effects of fire, soil climate, and moss on CO2 fluxes in black spruce ecosystems of interior Alaska
Fire is an important control on the carbon (C) balance of the boreal forest region. Here, we present findings from two complementary studies that examine how fire modifies soil organic matter properties, and how these modifications influence rates of decomposition and C exchange in black spruce (Picea mariana) ecosystems of interior Alaska. First, we used laboratory incubations to...
Authors
J. A. O'Donnell, M.R. Turetsky, J.W. Harden, K.L. Manies, L.E. Pruett, G. Shetler, J. C. Neff
Measurement of soil carbon oxidation state and oxidative ratio by 13C nuclear magnetic resonance Measurement of soil carbon oxidation state and oxidative ratio by 13C nuclear magnetic resonance
The oxidative ratio (OR) of the net ecosystem carbon balance is the ratio of net O2 and CO2 fluxes resulting from photosynthesis, respiration, decomposition, and other lateral and vertical carbon flows. The OR of the terrestrial biosphere must be well characterized to accurately estimate the terrestrial CO2 sink using atmospheric measurements of changing O2 and CO2 levels. To estimate...
Authors
W.C. Hockaday, C.A. Masiello, J. T. Randerson, R.J. Smernik, J.A. Baldock, O.A. Chadwick, J.W. Harden
Interactive effects of fire, soil climate, and moss on CO2 fluxes in black spruce ecosystems of interior Alaska Interactive effects of fire, soil climate, and moss on CO2 fluxes in black spruce ecosystems of interior Alaska
Fire is an important control on the carbon (C) balance of the boreal forest region. Here, we present findings from two complementary studies that examine how fire modifies soil organic matter properties, and how these modifications influence rates of decomposition and C exchange in black spruce (Picea mariana) ecosystems of interior Alaska. First, we used laboratory incubations to...
Authors
Jonathan A. O’Donnell, Merritt R. Turetsky, Jennifer W. Harden, Kristen L. Manies, L.E. Pruett, Gordon Shetler, Jason C. Neff
Linking soil organic matter dynamics and erosion-induced terrestrial carbon sequestration at different landform positions Linking soil organic matter dynamics and erosion-induced terrestrial carbon sequestration at different landform positions
Recently, the potential for terrestrial carbon (C) sequestration by soil erosion and deposition has received increased interest. Erosion and deposition constitute a sink for atmospheric carbon dioxide relative to a preerosional state or a noneroding scenario, if the posterosion watershed C balance is increased due to (1) partial replacement of eroded C by new photosynthate in the eroded...
Authors
Asmeret Asefaw Berhe, Jennifer W. Harden, Margaret S. Torn, John Harte
Boreal soil carbon dynamics under a changing climate: A model inversion approach Boreal soil carbon dynamics under a changing climate: A model inversion approach
Several fundamental but important factors controlling the feedback of boreal organic carbon (OC) to climate change were examined using a mechanistic model of soil OC dynamics, including the combined effects of temperature and moisture on the decomposition of OC and the factors controlling carbon quality and decomposition with depth. To estimate decomposition rates and evaluate their...
Authors
Zhaosheng Fan, Jason C. Neff, Jennifer W. Harden, Kimberly P. Wickland
Science and Products
Filter Total Items: 144
Effects of experimental water table and temperature manipulations on ecosystem CO2 fluxes in an Alaskan rich fen Effects of experimental water table and temperature manipulations on ecosystem CO2 fluxes in an Alaskan rich fen
Peatlands store 30% of the world's terrestrial soil carbon (C) and those located at northern latitudes are expected to experience rapid climate warming. We monitored growing season carbon dioxide (CO2) fluxes across a factorial design of in situ water table (control, drought, and flooded plots) and soil warming (control vs. warming via open top chambers) treatments for 2 years in a rich...
Authors
M.R. Chivers, M.R. Turetsky, J. M. Waddington, J.W. Harden, A. D. McGuire
Interactive effects of fire, soil climate, and moss on CO2 fluxes in black spruce ecosystems of interior Alaska Interactive effects of fire, soil climate, and moss on CO2 fluxes in black spruce ecosystems of interior Alaska
Fire is an important control on the carbon (C) balance of the boreal forest region. Here, we present findings from two complementary studies that examine how fire modifies soil organic matter properties, and how these modifications influence rates of decomposition and C exchange in black spruce (Picea mariana) ecosystems of interior Alaska. First, we used laboratory incubations to...
Authors
J. A. O'Donnell, M.R. Turetsky, J.W. Harden, K.L. Manies, L.E. Pruett, G. Shetler, J. C. Neff
Measurement of soil carbon oxidation state and oxidative ratio by 13C nuclear magnetic resonance Measurement of soil carbon oxidation state and oxidative ratio by 13C nuclear magnetic resonance
The oxidative ratio (OR) of the net ecosystem carbon balance is the ratio of net O2 and CO2 fluxes resulting from photosynthesis, respiration, decomposition, and other lateral and vertical carbon flows. The OR of the terrestrial biosphere must be well characterized to accurately estimate the terrestrial CO2 sink using atmospheric measurements of changing O2 and CO2 levels. To estimate...
Authors
W.C. Hockaday, C.A. Masiello, J. T. Randerson, R.J. Smernik, J.A. Baldock, O.A. Chadwick, J.W. Harden
Interactive effects of fire, soil climate, and moss on CO2 fluxes in black spruce ecosystems of interior Alaska Interactive effects of fire, soil climate, and moss on CO2 fluxes in black spruce ecosystems of interior Alaska
Fire is an important control on the carbon (C) balance of the boreal forest region. Here, we present findings from two complementary studies that examine how fire modifies soil organic matter properties, and how these modifications influence rates of decomposition and C exchange in black spruce (Picea mariana) ecosystems of interior Alaska. First, we used laboratory incubations to...
Authors
Jonathan A. O’Donnell, Merritt R. Turetsky, Jennifer W. Harden, Kristen L. Manies, L.E. Pruett, Gordon Shetler, Jason C. Neff
Linking soil organic matter dynamics and erosion-induced terrestrial carbon sequestration at different landform positions Linking soil organic matter dynamics and erosion-induced terrestrial carbon sequestration at different landform positions
Recently, the potential for terrestrial carbon (C) sequestration by soil erosion and deposition has received increased interest. Erosion and deposition constitute a sink for atmospheric carbon dioxide relative to a preerosional state or a noneroding scenario, if the posterosion watershed C balance is increased due to (1) partial replacement of eroded C by new photosynthate in the eroded...
Authors
Asmeret Asefaw Berhe, Jennifer W. Harden, Margaret S. Torn, John Harte
Boreal soil carbon dynamics under a changing climate: A model inversion approach Boreal soil carbon dynamics under a changing climate: A model inversion approach
Several fundamental but important factors controlling the feedback of boreal organic carbon (OC) to climate change were examined using a mechanistic model of soil OC dynamics, including the combined effects of temperature and moisture on the decomposition of OC and the factors controlling carbon quality and decomposition with depth. To estimate decomposition rates and evaluate their...
Authors
Zhaosheng Fan, Jason C. Neff, Jennifer W. Harden, Kimberly P. Wickland
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