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Studies of microbial ecology have evoked considerable interest in recent years with the natural ecosystem threatened by pollution due to industrialisation, mining etc. Iron mobilisation in a mangrove ecosystem is a complex process. There are a number of factors affecting mobilisation of iron in mangrove swamps, like the pH of soil, dissolved oxygen, iron source, etc.
Our paper describes experiments designed to look for the presence of iron‐reacting bacteria in mining area of Goa, and their activity was compared with iron bacteria found in the mangrove regions of the Konkan (non‐mining) area. It was observed that the activity of both iron‐oxidising and iron‐reducing bacteria was higher in mining areas compared to that in non‐mining areas, since ample substrate was available in the former.