Fig. 5. Left panel: Boxplots of ¹⁵N in lagoon ammonium and in well and stream (onsite, adjacent, and downstream) nitrate. Right panel: Boxplots of ¹⁵N in depth-integrated nests for combined transects. Boxes enclose the upper and lower quartile (25%) of data about the median, which is represented by a horizontal line within each box. Whiskers above and below boxes represent the upper quartile plus 1.5 times the interquartile distance (IQD) and the lower quartile minus 1.5 times the IQD. Outliers are represented by circles. Since samples from Transect 1 Nest E contained insufficient nitrate for isotopic analysis, these were not included in the Nest E plot.

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