trophogenic

trophogenic

[¦träf·ə¦jen·ik]
(ecology)
Originating from nutritional differences rather than resulting from genetic determinants, such as various castes of social insects.
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References in periodicals archive ?
The uniformly warm, circulating, and fairly turbulent upper layer corresponding to the trophogenic zone forms the epilimnion.
The shallow nature of the lake meant that the trophogenic zone extended to the substrate throughout, and carbon dioxide levels were probably low throughout the water column.