Kenneth Fortino edited ResultsCN.tex  over 7 years ago

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\subsection{Organic C and N}  The percent carbon of the surface sediments ranged between 3.05\% and 3.41\% with a median of 3.18\%. The bulk sediments ranged between 3.12 and 4.27 \% 4.27\%  C with a median of 3.29 \%. The difference between the bulk sediment \% carbon and the surface sediment \% carbon was small with a range of --0.13 to 1.13 \% 1.13\%  and a median of 0.09\%. Only 3 samples departed more than 0.5\% and in all of these the bulk sediment had greater \% C. The bulk and surface sediment \% C of the same bottle were uncorrelated (r = -0.12) and the leaf litter or nutrient additions had no effect (p >0.05) on the \% C of either the surface or bulk sediment. The \% N in the sediments was very highly correlated with the \% C of the same sediment sample (r = 0.968) and therefore, the \% N of the bulk and surface sediments showed the same patterns as the \% C. The \% N of the surface sediments ranged between 0.28 and 0.32 \% 0.32\%  with a median of 0.29 \%. 0.29\%.  The \% N of the bulk sediments (median = 0.31\%, range = 0.29 to 0.40\%) was overall slightly greater than the surface sediments with a median difference of 0.01\% and only 2 samples out of 14 with greater \% N in the surface sediment. As with the \% C, there was no effect (p > 0.05) of the leaf litter or nutrient additions on the \% N of either the surface or bulk sediments. The C:N of the sediments was constrained and only ranged between 10.48 and 11.27 across all of the bulk and surface sediment samples. There was no effect (p > 0.05) of added leaf litter or nutrients on the C:N of either the bulk or surface sediments. The C:N of the added leaf litter ranged 15.22 to 17.36 with a median of 16.16 which was significantly greater than the median C:N of either the surface or bulk sediments (p < 0.0001) and was not affected by the nutrient addition (p = 0.248).