B43J:
Drivers of Vegetation Change and Impacts on Biogeochemical and Biogeophysical Processes in Arctic Tundra Ecosystems II

Submit an Abstract to this Session



Session ID#: 35308

Session Description:
Arctic ecosystems are undergoing rapid change. Strong positive feedbacks to warming are possible in these ecosystems as carbon stored in permafrost soils is mobilized and evades to the atmosphere. However, vegetation is also changing and could alter biogeochemical cycling and biophysical processes in a way that offsets permafrost carbon release. Understanding how vegetation will alter biogeochemical cycling and biophysical processes as climate warms will allow better prediction of the future states of these ecosystems. Presentations are invited which use long term baseline studies, remote sensing, and process-level experiments to illustrate trends in vegetation and/or biogeochemical and biophysical feedbacks across different spatial and temporal scales, in order to enable prediction of future functional states of arctic ecosystems. This session will provide a forum for researchers to link tundra vegetation science via remote sensing, phenology, population- and ecosystem- ecology to address ecological dynamics in high-latitude ecosystems, and to promote collaboration.
Primary Convener:  Marion Syndonia Bret-Harte, University of Alaska Fairbanks, Institute of Arctic Biology, Fairbanks, AK, United States
Conveners:  April M Melvin, National Academy of Sciences, Polar Research Board & Board on Atmospheric Sciences and Climate, Washington, DC, United States, Michelle C Mack, Northern Arizona University, Center for Ecosystem Science and Society, Flagstaff, AZ, United States and Howard E Epstein, University of Virginia, Environmental Sciences, Charlottesville, VA, United States
Chairs:  Howard E Epstein, University of Virginia, Environmental Sciences, Charlottesville, VA, United States, April M Melvin, National Academy of Sciences, Polar Research Board & Board on Atmospheric Sciences and Climate, Washington, DC, United States, Michelle C Mack, Northern Arizona University, Center for Ecosystem Science and Society, Flagstaff, AZ, United States and Marion Syndonia Bret-Harte, University of Alaska Fairbanks, Institute of Arctic Biology, Fairbanks, AK, United States
OSPA Liaison:  April M Melvin, National Academy of Sciences, Polar Research Board & Board on Atmospheric Sciences and Climate, Washington, DC, United States

Cross-Listed:
  • C - Cryosphere
  • GC - Global Environmental Change
Index Terms:

0475 Permafrost, cryosphere, and high-latitude processes [BIOGEOSCIENCES]
0718 Tundra [CRYOSPHERE]
1632 Land cover change [GLOBAL CHANGE]
1640 Remote sensing [GLOBAL CHANGE]

Abstracts Submitted to this Session:

Possible causes of Arctic Tundra Vegetation Productivity Declines (Invited) (213348)
Uma Suren Bhatt1, Donald A Walker2, Martha K Raynolds3, Peter Bieniek1, Howard E Epstein4, Josefino C Comiso5, Jorge E Pinzon6 and Compton J Tucker7, (1)University of Alaska Fairbanks, Fairbanks, AK, United States, (2)University of Alaska Fairbanks, Alaska Geobotany Center, Fairbanks, AK, United States, (3)University of Alaska Fairbanks, Institute of Arctic Biology, Fairbanks, AK, United States, (4)University of Virginia, Environmental Sciences, Charlottesville, VA, United States, (5)NASA Goddard SFC, Greenbelt, MD, United States, (6)NASA Goddard Space Flight Center, Greenbelt, MD, United States, (7)NASA Goddard Space Flight Center, Earth Science Division, Greenbelt, MD, United States
Beyond greening and browning: the need for an integrated understanding of Arctic change (Invited) (289105)
John Arthur Gamon, University of Alberta, Dept. of Earth and Atmospheric Sciences, Edmonton, AB, Canada, K. Fred Huemmrich, University of Maryland Baltimore County, Baltimore, MD, United States, Gabriel Hmimina, University of Nebraska Lincoln, School of Nature Resources, Lincoln, NE, United States and Rong Yu, University of Nebraska - Lincoln, School of Natural Resources, Lincoln, NE, United States
The thin brown line: The crucial role of peat in protecting permafrost in Arctic Alaska (Invited) (224973)
Benjamin Gaglioti, Columbia University of New York, Lamont-Doherty Earth Observatory, Palisades, NY, United States, Daniel H Mann, Institute of Arctic Biology, University of Alaska Fairbanks, Fairbanks, United States, Louise Melanie Farquharson, University of Alaska Fairbanks, Geophysical Institute Permafrost Laboratory, Fairbanks, United States, Carson A. Baughman, U.S. Geological Survey, Alaska Science Center, Anchorage, United States, Benjamin M Jones, U.S. Geological Survey, Alaska Science Center, Anchorage, AK, United States, Vladimir E Romanovsky, Geophysical Institute, Fairbanks, AK, United States, A. Park Williams, Lamont -Doherty Earth Observatory, Palisades, NY, United States and Laia Andreu-Hayles, ICREA, Catalan Institution for Research and Advanced Studies, CREAF, Center for Ecological research and Forestry Applications, Barcelona, Spain
Ecohydrologic Changes due to Tree Expansion into Tundra in the Polar Urals, Russia (272968)
Valeriy Yu Ivanov1, Jingfeng Wang2, Husayn Ahmad El Sharif3, Desheng Liu4, Aleksey Y Sheshukov5, Valeriy Mazepa6, Stepan Shiyatov6 and Aleksandr Sokolov7, (1)University of Michigan Ann Arbor, Ann Arbor, MI, United States, (2)GA Ins of Tech-Civil & Env Eng, Atlanta, United States, (3)Georgia Water Resources Institute, Georgia Institute of Technology Main Campus, School of Civil and Environmental Engineering, Atlanta, United States, (4)The Ohio State University, Department of Geography, Columbus, United States, (5)Kansas State University, Biological & Agricultural Engineering, Manhattan, KS, United States, (6)Institute of Plant and Animal Ecology, the Ural Branch of the Russian Academy of Sciences, Yekaterinburg, Russia, (7)Institute of Plant and Animal Ecology, the Ural Branch of the Russian Academy of Sciences, Arctic Research Station, Labytnangi, Russia
Responses of CO2 Fluxes to Arctic Browning Events in a Range of High Latitude, Shrub-Dominated Ecosystems (250298)
Gareth K Phoenix, University of Sheffield, Sheffield, S10, United Kingdom, Rachael Treharne, Woodwell Climate Research Center, Falmouth, United States, Lisa Emberson, Environment and Geography Department, University of York, York, YO10 5DD UK, Stockholm Environment Institute, York, United Kingdom, Hans A Tømmervik, Norwegian Institute for Nature Research, FRAM – High North Research Centre for Climate and the Environment, Tromsø, Norway and Jarle W Bjerke, Norwegian Institute for Nature Research, Tromsø, Norway
The impact of shrubbification on soil organic matter accumulation (280891)
Lorna Street, Organization Not Listed, School of GeoSciences, Edinburgh, UNITED KINGDOM, Philip A Wookey, University of Stirling, Biological and Environment Sciences, Stirling, United Kingdom, Jens-Arne Subke, University of Stirling, Stirling, United Kingdom, Robert Baxter, Durham University, Durham, United Kingdom and Mark Garnett, Scottish Universities Environmental Research Center at the University of Glasgow, NERC Radiocarbon Facility, East Kilbride, United Kingdom
The role of deep nitrogen and dynamic rooting profiles on vegetation dynamics and productivity in response to permafrost thaw and climate change in Arctic tundra (215961)
Rebecca E Hewitt, Northern Arizona University, Center for Ecosystem Science and Society, Flagstaff, United States, Helene Genet, University of Alaska Fairbanks, Fairbanks, AK, United States, Donald Lee Taylor, University of New Mexico Main Campus, Department of Biology, Albuquerque, NM, United States, Anthony David McGuire, U.S. Geological Survey, Fairbanks, AK, United States and Michelle C Mack, Northern Arizona University, Center for Ecosystem Science and Society, Flagstaff, AZ, United States

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