Yet as many as a billion bacteria, plus millions of protozoa and hundreds of thousands of diatoms, occupy a square centimeter of a streambed, and the collective efforts of such microorganisms provide or process most of the energy that supports the visible life of the stream.
(as many as a billion bacteria, plus millions of protozoa and hundreds of thousands of diatoms; occupy; a square centimeter of a streambed) (the collective efforts of such microorganisms; provide; ) (the energy; supports; the visible life of the stream)
as many as a billion bacteria, plus millions of protozoa and hundreds of thousands of diatoms the collective efforts of such microorganisms the energy
occupy provide supports
a square centimeter of a streambed
the visible life of the stream