Competition is not a type of microbial interaction, but rather a type of ecological interaction that can occur between different species.

Decomposition is the process by which microorganisms break down organic matter into simpler substances.

Photosynthesis is not a role that microorganisms play in the cycling of nutrients in the environment, but rather a process that plants and some other organisms use to produce food.

Microbial ecology is the study of the interactions between microorganisms and their environment.

Outer space is not a type of microbial habitat, as there is no known life beyond Earth.

Nitrogen fixation is the process by which microorganisms convert atmospheric nitrogen into a form that can be used by plants.

Mesophiles are not extremophiles, as they are organisms that live in moderate temperatures.

Bioremediation is the process by which microorganisms remove harmful substances from the environment.

Amensalism is not a type of microbial symbiosis, but rather a type of ecological interaction in which one species is harmed while the other is unaffected.

Medical microbiology is the study of the interactions between microorganisms and humans.

Protozoa are not typically considered to be microbial pathogens, although some species can cause disease in humans.

Aerobic respiration is the process by which microorganisms produce energy from organic compounds in the presence of oxygen.

Ecosystem is not a type of microbial community, but rather a larger ecological community that includes both living and non-living components.

Plant-microbe interactions is the study of the interactions between microorganisms and plants.

The oxygen cycle is not a type of microbial biogeochemical cycle, as it is driven primarily by abiotic processes.