Trophic levels = Energy flow: Producers → Herbivores → Carnivores → Top predators.
A trophic level represents the position of an organism in the food chain based on its source of energy.
Different types of trophic levels in an ecosystem include:
| List I | List II |
|---|---|
| A. The Evil Quartet | III. Causes of biodiversity losses |
| B. Ex situ conservation | I. Cryopreservation |
| C. Lantana camara | II. Alien species invasion |
| D. Dodo | IV. Extinction |