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Fig 1. Lake Chad and the Seuss Glacier in Taylor Valley in the McMurdo Dry Valleys, South Victorialand, Antarctica.
Rebecca Witherow, www.mcmlter.org
The carbon to nitrogen ratio in DOM and the fluorescence index (FI) for all samples from the 13 LTER and other field sites from across the United States. DOM samples with a higher FI have a greater contribution from algae and bacteria, i.e. are more similar to Antarctic lake DOM and are richer nitrogen compared to carbon (lower C:N ratio). The asterisk indicates significant at the 95% confidence level.
Jaffe R, McKnight D, Maie N, Cory, R., McDowell, W. H., Campbell, J. L. 2008. Spatial and temporal variations in DOM composition in ecosystems: The importance of long-term monitoring of optical properties. Journal of Geophysical Research-Biogeosciences113G4G04032 .