Microbial manganese oxidation and nitrification in relation to the occurrence of macrophyte roots in a lacustrine sediment

Aquatic macrophytes in the Concretion Cove area of Lake Charlotte, Nova Scotia, Canada appear to restrict microbial manganese oxidation to the production of dispersed, microscopic oxides within sediments. When macrophyte roots are not present in the sediments, large ferromanganese concretions are found at the sediment surface. Macrophyte roots and the manganese oxidizers may have also played a role in the restriction of nitrification to deeper in the sediments.