How we use isotopes to study microbes and their activities

Mark Trimmer

We cannot even see microbes – how can we possibly understand what they do!?

When you look in the mirror, you may think you're the same person as yesterday, but in terms of your composition, that's not entirely true. Life on Earth is made up of elements constantly cycled between the environment and living organisms. Microbes play a crucial role in these cycles, such as the carbon and nitrogen cycles, and their activities can be measured using isotopes.

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