| Microcystis is prevented from staying in the euphotic zone and hindered in its growth. |
| This illuminated surface layer is called the euphotic zone, and all of the ocean's primary production occurs there. |
| All plankton, kelp forests and seagrass beds are found in the euphotic zone. |
| This composite sample will then represent all levels of the lake water in the euphotic zone. |
| The illuminated region above it is called the photic zone, within which are distinguished the euphotic and disphotic zones. |
| Phytoplankton, which like all plants require light, are concentrated in the euphotic zone. |
