| Indeed, the MLD maximum, usually reached in late winter determines the annual nutrient reloading of the euphotic zone. |
| This composite sample will then represent all levels of the lake water in the euphotic zone. |
| The euphotic zone extends from the surface down to the maximum depth at which photosynthetic plants can grow. |
| The deeper waters are a reservoir of nutrients, and the primary supply pathway for 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. |
