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Hydraulics is a key driver of microbial life in streams and rivers

In streams and rivers, bacteria, algae, and other microorganisms form tight-knit communities that feed the ecosystem, drive its biodiversity, and purify its water. These communities exist in several forms, swimming freely, clumping together, or as biofilms that attach to rocks and other surfaces. For the first time, a team of researchers has shown that the amount of turbulence the microorganisms are exposed to determines the form of their community.
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