Supplementary Data 5

Pore water analysis of ΣH₂S, SiO₂, SO₄^2-, Fe²⁺, Mn²⁺, Ni²⁺, HPO₄^2-, NH4+, NO₃^-, and NO₂^- by sediment depth in Koljö Fjord, Kristineberg Bay (Western Sweden), Nearshore and Offshore stations from Tvärminne archipelago (southern Finland).