Extended Data Fig. 1. Sugars were more abundant in pore waters underneath P. oceanica than in unvegetated sediments.

A volcano plot comparing gas chromatography–mass spectrometry peaks from pore water metabolites collected inside (In) versus 1 and 20 m away from a seagrass meadow (Edge/Out). Significant peaks (Benjamini-Hochberg adjusted one-way ANOVA p-value < 0.1) are represented by coloured circles (α < 0.1). The grey dashed lines represent Log2-fold changes > 2; The orange dashed line represents Benjamini-Hochberg corrected p-values < 0.1.