Figure 2
From: The effect of tidal forcing on biogeochemical processes in intertidal salt marsh sediments
Porewater O2(aq), Mn2+, Fe2+, ΣH2S, org-Fe(III)(aq), FeS(aq), and ΣPO43-, and ascorbate- and dithionite-extractable Fe as a function of depth in sediment cores collected ex situ at: a) the mud flat site; and b) the creek bank site in the Skidaway Salt Marsh in June 2002. All porewater chemical species, except ΣPO43-, were measured electrochemically in intact sediment cores. Mn2+ was below minimum detection limit (MDL) in the mud flat porewaters. Note the difference in the O2(aq) and Fe2+ concentration scales between both sites.