Trophic level

A trophic level of an organism is its position in a food chain.

Levels are numbered according to how far particular organisms are along the chain from the primary producers [plants] at level 1, to herbivores (level 2), to predators (level 3), to carnivores or top carnivores (level 4 or 5).

Fish at higher trophic levels are typically of higher economic value.

Source: Millennium Ecosystem Assessment Figure 1.3. Decline in Trophic Level of Fisheries Catch Since 1950

Source: Nordisk familjebok  (1904–1926), public domain

Food web

Español: Nivel trófico
Français: Niveau trophique

Ecosystem Change

Biodiversity (CBD)

DEHP

Marine Litter

Cadmium