Fig 5. Sulfur isotopic response in sulfur compounds in Zostera marina upon sulfide intrusion.

Shift of average δ³⁴S values (± SEM) in per mille [‰] of bulk sulfur and different sulfur compounds from Zostera marina between high sulfide concentrations (HS) and control conditions (C); n = 6. Capital letters indicate significant differences between compounds in a tissue and lower case letters indicate differences between tissues for a specific compound (ANOVA and Tukey’s test, p < 0.05).