Water

with

(lissolwed O2

°2

*/>.»/ tHus

Action ot suit uf ondmnq bactena

Desu/fCMhrtt

Sediment

Action ot sultate reducmg bactena

Open sea

Lagoon

X

V

V

Walor with dissolwed H2S ^ no O2

Water with dissolveri 0?

V    ^Ł

No sułfur oxidi/ing bactena

Action ot sultate reducmg bactena

Sediment