Extended Data Fig. 2: Coral-bound δ15N distribution across the Wider Caribbean.
From: Equatorial upwelling of phosphorus drives Atlantic N2 fixation and Sargassum blooms
Boxplots based on 2507 newly measured CB-δ15N values (in ‰ vs. air) grouped according to the coral core location and compared to the mean Caribbean nitrate δ15N (3.28 ± 0.76‰) as indicated by the horizontal shaded area. CB-δ15N values for Bermuda are based on Wang et al. (2015). Values above mean Caribbean nitrate δ15N indicate regions that are suspected to be influenced by local conditions. The white dot represents the average value whereas the middle line represents the median value. The lower and upper bound of the box correspond to the first and third quartiles. The upper whisker extends from the upper bound box to the largest value within 1.5 times the inter-quartile range (IQR) from the hinge, while the lower whisker extends from the lower bound box to the smallest value within 1.5 times the IQR from the hinge. Values beyond the whiskers are considered outliers and are plotted individually.
