An ontology about groups of interacting organisms such as populations and communities
Clone or download
Fetching latest commit…
Cannot retrieve the latest commit at this time.
Failed to load latest commit information.


The Population and Community Ontology (PCO) describes material entities, qualities, and processes related to collections of interacting organisms such as populations and communities. It is taxon neutral, and can be used for any species, including humans. The classes in the PCO are useful for describing evolutionary processes, organismal interactions, and ecological experiments. Practical applications of the PCO include community health care, plant pathology, behavioral studies, sociology, and ecology.

The PCO is complient with the Basic Formal Ontology (BFO). It is designed to be compatible with other OBO Foundry ontologies, such as the Gene Ontology (GO), which covers biological processes, and the Phenotype and Trait Ontology (PATO), which covers qualities.

Comments or requests

Please use the Issue tracker for comments, requests for new terms, and suggested changes to existing terms. Before submitting a new request, do a search to see if there is an existing issue on the same topic. Click the issues tab to reach the issue tracker.

You can send an email to the PCO mailing list at