The trophic level of an organism is the position it occupies in a food chain. The word trophic derives from the Greek τροφ? (trophē) referring to food or feeding.

Interactions Among Three Trophic Levels: Influence of Plants on Interactions Between Insect Herbivores and Natural Enemies
Ecosystem response to solar ultraviolet-B radiation: influence of trophic-level interactions
Trophic level asynchrony in rates of phenological change for marine, freshwater and terrestrial environments
Standardized diet compositions and trophic levels of sharks
Climate change and unequal phenological changes across four trophic levels: constraints or adaptations?
Number of trophic levels in ecological communities
The Effect of Dietary Nitrogen Content on Trophic Level15N Enrichment
Mixed messages across multiple trophic levels: the ecology of bark beetle chemical communication systems
Habitat fragmentation causes immediate and time‐delayed biodiversity loss at different trophic levels
Impacts of fishing low-trophic level species on marine ecosystems