Virtual Posters
To submit your poster to the APECS Virtual Poster Session, simply fill out the form and upload your poster as a pdf (Maximum File Size is 3 MB) .
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Virtual Posters
CONCENTRATION AND BIOAVAILABILITY OF CARBON-BASED COMPOUNDS EXPORTED FROM THE MACKENZIE DELTA, WESTERN CANADIAN ARCTIC, DURING ANNUAL HIGH-WATER PERIODS.
Terrestrial
Ocean Sciences Meeting, American Society of Limnology and Oceanography, Portland, USA. 22-26 February 2010
2010
Mackenzie River discharge is strongly influenced by the extensive and lake-rich Mackenzie Delta floodplain (45,000 lakes in 13,000 km2). Floodplain effects can be substantial since ~30% of the total water volume entering the Mackenzie Delta during the flood is temporarily stored in off-channel areas. During storage, the concentration and bioavailability of carbon compounds are altered by exposure to sunlight, uptake by aquatic organisms, and the release of leachates from submerged landscape.
High discharge rates occur annually during the spring break-up and flood. This period is characterized by jammed and moving ice throughout the Delta, which makes sampling difficult. However, the observed high discharge rates, mostly derived from snowmelt drainage percolating through the landscape surface of the Mackenzie Basin during a very short period of time, imply that this may be when the majority of annual carbon export to the Beaufort Sea occurs. In an effort to quantify and characterize carbon discharge to the Beaufort Sea, an intensive sampling program was undertaken during 2007, 2008, and 2009 as part of an International Polar Year project.
High discharge rates occur annually during the spring break-up and flood. This period is characterized by jammed and moving ice throughout the Delta, which makes sampling difficult. However, the observed high discharge rates, mostly derived from snowmelt drainage percolating through the landscape surface of the Mackenzie Basin during a very short period of time, imply that this may be when the majority of annual carbon export to the Beaufort Sea occurs. In an effort to quantify and characterize carbon discharge to the Beaufort Sea, an intensive sampling program was undertaken during 2007, 2008, and 2009 as part of an International Polar Year project.
limnology, Mackenzie Delta, nutrients, carbon, discharge, Beaufort Sea
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