If you scooped up a glass of water from the sea, the chances are that it would look no different to a glass of water you poured from the tap. But would it be the same? How could you find out if there was anything living in the water?

Download this PowerPoint which shows the process of sampling water and looking at the different microorganisms found.

The images in this resources are courtesy of NIWA and IPY CAML.

    Published 3 December 2007