oligotrophic vs. eutrophic

oligotrophic

[ol-i-goh-trof-ik, -troh-fik] / ˌɒl ɪ goʊˈtrɒf ɪk, -ˈtroʊ fɪk /

adjective

Ecology.

(of a lake) characterized by a low accumulation of dissolved nutrient salts, supporting but a sparse growth of algae and other organisms, and having a high oxygen content owing to the low organic content.

eutrophic

[yoo-trof-ik, -troh-fik] / yuˈtrɒf ɪk, -ˈtroʊ fɪk /

Medicine/Medical. relating to or being in a condition of eutrophy, or healthy or adequate nutrition or development.
Ecology. (of a lake) characterized by an abundant accumulation of nutrients that support a dense growth of algae and other organisms, the decay of which depletes the shallow waters of oxygen in summer.