tropholytic
/ˌtrɒfəˈlɪtɪk/ /ˌtrəʊfəˈlɪtɪk/adjective
Ecology. Of a layer or zone of standing water, especially in a lake: characterized by the consumption or decomposition of organic nutrients and oxygen produced by photosynthesis.
Origin
Early 20th century (in an earlier sense). From tropho- + -lytic, after German tropholytisch.