A mining site contaminated with acid mine drainage (AMD) has a pH below 2 and contains high concentrations of toxic metals. Despite the harsh conditions, microbial communities thrive. Which microbial group is MOST LIKELY responsible for biogeochemical cycling in this environment?

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Answer

Iron-oxidizing bacteria that generate acidity by oxidizing Fe²⁺

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Methanogenic archaea that produce methane in anaerobic conditions

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Cyanobacteria that fix nitrogen and oxygenate the water

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Halophilic bacteria that tolerate extreme salt concentrations

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A mining site contaminated with acid mine drainage (AMD) has a pH below 2 and co...

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