Arctic Research at the MBL The Ecosystems Center carries out Arctic research at the Toolik Field Station of the University of Alaska Fairbanks. The Dalton.

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Presentation transcript:

Arctic Research at the MBL The Ecosystems Center carries out Arctic research at the Toolik Field Station of the University of Alaska Fairbanks. The Dalton Highway and the oil pipeline are nearby.

AON - Carbon/Water/Energy Project (IPY) Toolik Observatory Cherskii Observatory PanArctic Network Arctic Ecology Course

National Ecological Observatory Network

Proposed NEON sites in Alaska. Toolik and Caribou/Poker Creek will be core (intensive) sites.

LTER APPROACHES: EXPERIMENTS & MODELS Tundra: heat soil, reduce light, fertilize, exclude grazers Land/water: increase soil moisture Stream: fertilize, add or remove predators Lake: fertilize, add or remove top predator (lake trout), add predator (sculpin)

Rastetter et al 2004 Linked-process, dynamic ecosystem models allow us to project knowledge from plot-based studies through time Responses to increasing CO 2 and temperature over the next century are constrained by carbon- nutrient interactions, but such projections still do not account for spatial interactions on the Arctic landscape.

Spatial Extrapolation of Ecosystem Productivity in Arctic Tundra Williams et al 2001 Simple process models linked to satellite and spatially referenced climate data allow us to project knowledge from plot-based studies to regions and the Pan Arctic.... but such projections do not account for spatial interactions on the Arctic landscape.

Photo courtesy Ted Hogg Other MBL Research Projects in the Arctic The PARTNERS project of the ARCSS Freshwater Initiative is examining the land-ocean linkages via river biogeochemical fluxes at the larger pan-arctic scale. SNACS (Study of the Northern Alaska Coastal System) project led by Marc Stieglitz investigates the linkage between hydrologic variables and the fluxes of nutrients and organic matter (constituents) from the North Slope of Alaska to the Beaufort Sea.

Photo courtesy Ted Hogg Other MBL Research Projects in the Arctic The LANDSCAPES project, with support from NSF-DEB, studies terrestrial C-N interactions, the N cycle, and the limitation of the tundra C cycle by N. The ITEX project, with support from NSF-Arctic System Science (ARCSS), studies controls on canopy structure of arctic vegetation, variation in ecosystem CO2 exchange, and C and N allocation in tundra vegetation How Arctic shrubs get their nitrogen through symbiosis with mushrooms (Hobbie and Hobbie).