The organism likely to be in the bottom trophic level of a food chain is a producer.

Here's why:

* Producers are the foundation of food chains. They are autotrophs, meaning they can make their own food through photosynthesis (like plants) or chemosynthesis (like some bacteria).

* Consumers are organisms that rely on other organisms for food. They occupy higher trophic levels.

Examples of producers:

* Plants

* Algae

* Phytoplankton

* Some bacteria

Let me know if you'd like more information about trophic levels!