GC43B:
Biota and Biogeochemical Cycling: Ecological Patterns and Processes across Scales in the Arctic II Posters

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Session ID#: 13826

Session Description:
The Arctic is rapidly changing as the climate warms, yet how this change is altering ecological dynamics across scales is poorly understood. Decades of plot- and satellite-based studies underpin our understanding of change in Arctic systems, but linking patterns and processes across levels of ecological organization has traditionally been hampered by a lack of moderate-scale data.

The application of emerging methods - including the integration of unmanned aerial systems (UAS), time-lapse photography, multi-platform satellite observations and cross site ecological data synthesis – are filling a long-standing gap in our understanding of how scale affects observed and predicted ecological change.

This session will provide a forum for researchers from the fields of tundra remote sensing, phenology, population- and ecosystem- ecology to address concepts of scale-dependent ecological dynamics in high-latitude ecosystems.  Each presentation will address how working across scales can improve our understanding of the ecological processes reshaping the rapidly changing Arctic.
Primary Convener:  Jeffrey Kerby, Dartmouth College, Hanover, NH, United States
Conveners:  Howard E Epstein, University of Virginia, Environmental Sciences, Charlottesville, VA, United States, Marion Syndonia Bret-Harte, University of Alaska Fairbanks, Institute of Arctic Biology, Fairbanks, AK, United States and Sally MacIntyre, University of California Santa Barbara, Santa Barbara, CA, United States
Chairs:  Sally MacIntyre, University of California Santa Barbara, Santa Barbara, CA, United States, Marion Syndonia Bret-Harte, University of Alaska Fairbanks, Institute of Arctic Biology, Fairbanks, AK, United States and Isla H Myers-Smith, Université de Sherbrooke, Sherbrooke, Canada
OSPA Liaison:  Marion Syndonia Bret-Harte, University of Alaska Fairbanks, Institute of Arctic Biology, Fairbanks, AK, United States

Cross-Listed:
  • B - Biogeosciences
Index Terms:

1630 Impacts of global change [GLOBAL CHANGE]
1632 Land cover change [GLOBAL CHANGE]
1637 Regional climate change [GLOBAL CHANGE]
1640 Remote sensing [GLOBAL CHANGE]

Abstracts Submitted to this Session:

Variability in Surface Energy Dynamics and Soil Climate Through Differing Vegetation Types in an Alaskan Tundra Ecosystem (181111)
Claudia Buszta1, Michael M Loranty2, Adrian V Rocha3 and Salvatore Rex Curasi3, (1)Colgate University, Hamilton, NY, United States, (2)Colgate University, Geography, Hamilton, NY, United States, (3)University of Notre Dame, Department of Biological Sciences, Notre Dame, IN, United States
Assessing Seedling Recruitment in Retrogressive Thaw Slumps in the Alaskan Low Arctic (186440)
Diane C Huebner, University of Alaska Fairbanks, Fairbanks, AK, United States and Marion Syndonia Bret-Harte, University of Alaska Fairbanks, Institute of Arctic Biology, Fairbanks, AK, United States
Tundra fire disturbance homogonizes belowground food web structure, function and dynamics (196188)
John C Moore1, Yamina Pressler1, Amanda Koltz2, Ashley Asmus3 and Rodney Simpson1, (1)Colorado State University, Fort Collins, CO, United States, (2)Washington University in St Louis, Biology, St. Louis, MO, United States, (3)University of Texas at Arlington, Arlington, TX, United States
Summer warming and changes in snow depth is reflected in the growth rings of Alaskan tundra shrubs (Toolik Lake) (118246)
Agata Buchwal, Adam Mickiewicz University, Institute of Geoecology and Geoinformation, Poznan, Poland and Jeffrey M Welker, University of Alaska Anchorage, Anchorage, AK, United States
Effects of soil warming on CO2 efflux in tundra soil: Response to a 2015 episodic event (119364)
Yongwon Kim1, Sang-Jong Park2, Baek-Min Kim3, Mee-Hyun Cho4, Rikie Suzuki5, Bang-Yong Lee6 and John E Walsh1, (1)University of Alaska Fairbanks, Fairbanks, AK, United States, (2)Korea Polar Research Institute, Division of Ocean & Atmosphere Sciences, Incheon, South Korea, (3)Korea Polar Research Institute, Incheon, South Korea, (4)Korea Polar Research Institute, Division of Climate Change, Incheon, Korea, Republic of (South), (5)JAMSTEC Japan Agency for Marine-Earth Science and Technology, Department of Environmental Geochemical Cycle Research, Kanagawa, Japan, (6)Korea Polar Research Institute, Arctic Research Center, Incheon, Korea, Republic of (South)
Spatial Variability, Drivers, and Scale-Mismatch of Tundra Greenup Phenology at a Landscape Extent (121736)
Jeffrey Kerby, Pennsylvania State University Main Campus, University Park, PA, United States
Linking Arctic plant biodiversity measurements with landscape heterogeneity (124199)
Florian Gerber, University of Zurich, Zurich, Switzerland, Gabriela Schaepman-Strub, University of Zurich, Department of Evolutionary Biology and Environmental Studies, Zurich, Switzerland and Reinhard Furrer, Institute of Mathematics, University of Zurich, Zurich, Switzerland
Nitrogen Isotope Evidence for a Shift in Eastern Beringian Nitrogen Cycle after the Terminal Pleistocene (132439)
Farnoush Tahmasebi, University of Western Ontario, London, ON, Canada, Fred J Longstaffe, University of Western Ontario, Dept of Earth Sciences, London, ON, Canada and Grant Zazula, Government of Yukon, Department of Tourism and Culture (Palaeontology Program), Whitehorse, YT, Canada
Shrubs stimulate heterotrophic respiration in arctic soils (135110)
Carly Anne Phillips, University of Victoria, Pacific Institute for Climate Solutions, Victoria, Canada and Nina Wurzburger, University of Georgia, Athens, United States
Evidence for increasing desiccation of vegetation in Greenland? (142730)
Jeffery A. Thompson, University of Colorado at Boulder, Cooperative Institute for Research in Environmental Sciences, Boulder, CO, United States and Lora Koenig, National Snow and Ice Data Center, Boulder, CO, United States
Physiological response curves reveal differences among season advancement and timing of grazing experimental treatments in a coastal Alaskan wetland (145034)
A. Joshua Leffler, South Dakota State University, Natural Resource Management, Brookings, SD, United States, Kathy Kelsey, University of Alaska Anchorage, Biological Sciences, Anchorage, AK, United States, Karen H. Beard, Utah State University, Department of Wildland Resources, Logan, United States, Ryan T. Choi, Utah State University, Department of Wildland Resources, Logan, UT, United States and Jeffrey M Welker, University of Alaska Anchorage, Anchorage, AK, United States
Snow melt water use and tundra plant gas exchange: An ecohydrological perspective on vegetation changes in the Arctic (146173)
Robert G Jespersen1, Alan Joshua Leffler2 and Jeffrey M Welker1, (1)University of Alaska Anchorage, Anchorage, AK, United States, (2)South Dakota State University, Department of Natural Resource Management, Brookings, SD, United States
Greenhouse Gas (CO2, CH4 & N2O) Feedbacks are Regulated by Phenological Changes in Herbivore-Vegetation Interactions in Alaskan Coastal Tundra (152424)
Kathy Kelsey1, Alan Joshua Leffler2, Karen H. Beard3, Kaj Lynoe4, Ryan T. Choi5 and Jeffrey M Welker4, (1)University of Alaska Anchorage, Biological Sciences, Anchorage, AK, United States, (2)South Dakota State University, Department of Natural Resource Management, Brookings, SD, United States, (3)Utah State University, Department of Wildland Resources, Logan, United States, (4)University of Alaska Anchorage, Anchorage, AK, United States, (5)Utah State University, Department of Wildland Resources, Logan, UT, United States
A model of growth and carbon storage in Eriophorum Vaginatum L. (156578)
Salvatore Rex Curasi1, Adrian V Rocha1, Diogo Bolster2, Ned Fetcher3 and Thomas Parker4, (1)University of Notre Dame, Department of Biological Sciences, Notre Dame, IN, United States, (2)University of Notre Dame, Civil and Environmental Engineering and Earth Sciences, Notre Dame, IN, United States, (3)Wilkes University, Institute for Environmental Science and Sustainability, Wilkes Barre, PA, United States, (4)Marine Biological Laboratory, Ecosystems Center, Woods Hole, MA, United States
Challenges for circumpolar landcover mapping with remotely sensed data (159775)
Annett Bartsch1, Barbara Widhalm1, Angelika Höfler1, Christine Kroisleitner1 and Anna Maria Trofaier2, (1)Zentralanstalt für Meteorologie und Geodynamik, Climate Change Impacts, Vienna, Austria, (2)Austrian Polar Research Institute, Vienna, Austria
Carbon and Nitrogen Pools of Soil and Fine Roots across Alaskan Tundra and Boreal Forest Ecosystems. (163399)
Lindsay Anne McCulloch, Brown University, Providence, RI, United States, Michael M Loranty, Colgate University, Geography, Hamilton, NY, United States, Catherine L. Cardelús, Colgate University, Biology, Hamilton, NY, United States, Susan Natali, Woodwell Climate Research Center, Falmouth, United States and Alexander L Kholodov, University of Alaska Fairbanks, Geophysical Institute, Fairbanks, AK, United States
Flowpath of Snowmelt Water in an Ice-Covered Arctic Lake (167371)
Alicia Cortes, University of California Davis, Tahoe Environmental Research Center, Davis, CA, United States, Sally MacIntyre, University of California Santa Barbara, Santa Barbara, CA, United States and Steven Sadro, University of California Davis, Davis, CA, United States
Discerning spatial and temporal LAI and clear-sky FAPAR variability during summer at the Toolik Lake vegetation monitoring grid (North Slope, Alaska) (174139)
Birgit Heim1, Alison Leslie Beamish2, Donald A Walker3, Howard E Epstein4, Torsten Sachs5, Sabine Chabrillat6, Marcel Buchhorn3,7 and Anupma Prakash8, (1)Alfred Wegener Institute Helmholtz Center for Polar and Marine Research, Polar Terrestrial Environmental Systems, Potsdam, Germany, (2)Alfred Wegener Institute Helmholtz-Center for Polar and Marine Research Potsdam, Potsdam, Germany, (3)University of Alaska Fairbanks, Institute of Arctic Biology, Fairbanks, AK, United States, (4)University of Virginia, Environmental Sciences, Charlottesville, VA, United States, (5)GFZ German Research Centre for Geosciences, Potsdam, Germany, (6)Deutsches GeoForschungsZentrum GFZ, Potsdam, Germany, (7)VITO, Flemish Institute for Technological Research, Mol, Belgium, (8)University of Alaska Fairbanks, Fairbanks, AK, United States
Drivers and Impacts of Ecological Change on the Yukon-Kuskokwim Delta, Alaska (178379)
Gerald V Frost Jr1, Uma Suren Bhatt2, Torre Jorgenson3, Matthew J Macander1, Matthew Allen Whitley2 and Rachel Loehman4, (1)Alaska Biological Research, Inc., Fairbanks, AK, United States, (2)University of Alaska Fairbanks, Fairbanks, AK, United States, (3)Alaska Ecoscience, Fairbanks, AK, United States, (4)USGS Alaska Science Center, Anchorage, AK, United States

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