Bourbonniere, R. A.. Environment Canada / NWRI, Rick.Bourbon@cciw.ca
Edmondson, K. A.. Environment Canada / NWRI, Karen.Edmondson@cciw.ca
FRACTIONATION PATTERNS INDICATE DISSOLVED ORGANIC MATTER CHARACTER IN CANADIAN INLAND WATERS
Dissolved organic matter (DOM) contained in water collected from a wide variety of lakes, rivers, ponds, wetlands and groundwaters, mostly from central Canada, was fractionated into six hydrophobic and hydrophilic sub-fractions using the XAD-8 and XAD-4 resin methodology. When DOM fractionation results are treated as fingerprints, they reveal relationships among sites and reflect the biogeochemical environment from which they were collected.
The DOM character of a water body, as indicated by the fractionation patterns, can vary in relation to ancillary water chemistry parameters (e.g. conductivity, major ions, nutrients, etc.) measured on the same samples, yielding more information than can be obtained by characterizing the organic matter of a water body by its DOC content alone. DOM fractionation patterns can also vary seasonally, providing insight regarding the influence of hydrologic and other processes (e.g. UV radiation, microbial degradation) on the character and cycling of organic matter in these inland water bodies. Finally the differential reactivity of DOM fractions towards degradation by solar radiation will be demonstrated.
Day: Tuesday, Feb. 2
Time: 11:00 - 11:15am
Location: Eldorado Hotel