B31G:
Biogeochemical Cycling Across Redox Regimes in Arctic and Subarctic Ecosystems Posters


Submit an Abstract to this Session


Session ID#: 46574

Session Description:
Arctic and subarctic ecosystems are experiencing pronounced warming that is altering landscape structure, hydrology, and biogeochemical cycles. In particular, many permafrost-affected systems are experiencing changes in soil saturation due to both changing water balances and extensive permafrost thaw. Hydrologic changes will drive redox shifts that have cascading effects on biogeochemical cycles of carbon, nutrients (nitrogen, phosphorus), and metals (iron, manganese, etc.). Although substantial research has been geared towards understanding how the organic matter stored in high-latitude soils will decompose under warming climate, fewer studies have examined how redox regulates biogeochemical processes in these systems, particularly with respect to nutrients and metals. This session invites presentations that monitor redox conditions and/or explore how biogeochemical processes vary across redox regimes within arctic and subarctic ecosystems.
Primary Convener:  Elizabeth Herndon, Kent State University Kent Campus, Kent, OH, United States
Conveners:  Lauren E Kinsman-Costello, Maximilian Barczok and Chelsea Smith, Kent State University, Kent, United States
Primary Liaison:  Elizabeth Herndon, Oak Ridge National Laboratory, Environmental Sciences Division, Oak Ridge, United States
Chairs:  Maximilian Barczok, Kent State University, Kent, United States and Chelsea Smith, Kent State University, Kent, United States
OSPA Liaison:  Elizabeth Herndon, Oak Ridge National Laboratory, Environmental Sciences Division, Oak Ridge, United States
Index Terms:

0428 Carbon cycling [BIOGEOSCIENCES]
0461 Metals [BIOGEOSCIENCES]
0471 Oxidation/reduction reactions [BIOGEOSCIENCES]
0475 Permafrost, cryosphere, and high-latitude processes [BIOGEOSCIENCES]

Abstracts Submitted to this Session:

More than Methane: Biogeochemical Processes in High Arctic Fjord Valley Infill Sediments (416528)
Eleanor Louise Jones1,2, Andrew J Hodson2, Steven Thornton3, Kelly R Redeker4, Jade Rogers3 and Peter Wynn5, (1)University of Sheffield, Sheffield, S10, United Kingdom, (2)University Centre in Svalbard, Longyearbyen, Norway, (3)University of Sheffield, Sheffield, United Kingdom, (4)University of York, York, United Kingdom, (5)Lancaster University, Lancaster, United Kingdom
Carbon and nutrient dynamics in Arctic stream networks determined with catchment-scale estimates of redox reactions (Invited) (453780)
Benjamin W Abbott, Brigham Young University, Plant and Wildlife Sciences, Provo, UT, United States, Jay P Zarnetske, Michigan State University, Department of Earth and Environmental Sciences, East Lansing, MI, United States, William B Bowden, University of Vermont, Rubenstein School of Environment and Natural Resources, Burlington, VT, United States, Frances Iannucci, University of Vermont, Burlington, VT, United States, Arial Shogren, Michigan State University, Department of Earth and Environmental Sciences, East Lansing, United States, Natasha Griffin, Brigham Young University, Provo, UT, United States, Samuel Bratsman, Brigham Young University, Provo, United States and Rachel Watts, Utah State University, Department of Watershed Sciences, Logan, United States
Contributions of Iron to Peatland Carbon Stabilization and Losses Under a Warming Climate (435432)
Holly Curtinrich, Iowa State University, Ames, IA, United States and Steven J Hall, Iowa State University, Department of Ecology, Evolution, and Organismal Biology, AMES, United States
Iron speciation across redox regimes in arctic tundra soil (378030)
Elizabeth Herndon1, Maximilian Barczok2, Aaron Thompson3, Lauren E Kinsman-Costello2 and Chelsea Smith2, (1)Kent State University Kent Campus, Kent, OH, United States, (2)Kent State University, Kent, United States, (3)University of Georgia, Crop and Soil Sciences, Athens, GA, United States
Phosphate sorption to iron (oxy)hydroxides in organic tundra and boreal soils (397560)
Lauren E Kinsman-Costello1, Kiersten Duroe2, Jonathan Mills3, Maximilian Barczok1, Chelsea Smith1 and Elizabeth Herndon4, (1)Kent State University, Kent, United States, (2)Kent State University Kent Campus, Kent, OH, United States, (3)Kent State University, Kent, OH, United States, (4)Oak Ridge National Laboratory, Environmental Sciences Division, Oak Ridge, United States
Influence of iron (oxyhydr)oxide crystallinity on phosphorus bioavailability in fluctuating redox conditions (378360)
Maximilian Barczok1, Chelsea Smith2, Lauren E Kinsman-Costello2 and Elizabeth Herndon3, (1)Kent State University Kent Campus, Kent, OH, United States, (2)Kent State University, Kent, United States, (3)Oak Ridge National Laboratory, Environmental Sciences Division, Oak Ridge, United States
Understanding how microorganisms influence the bioavailability of iron-bound phosphate under shifting redox regime in nutrient poor soils. (424147)
Chelsea Smith1, Maximilian Barczok2, Elizabeth Herndon3 and Lauren E Kinsman-Costello2, (1)Kent State University Kent Campus, Kent, OH, United States, (2)Kent State University, Kent, United States, (3)Oak Ridge National Laboratory, Environmental Sciences Division, Oak Ridge, United States

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