A forest community is not just made up of trees. The forest community includes an unendless list of many diverse living organisms which have been living together since the beginning of time.
Runkel, Sylvan T.
"The Iowa Forest Community,"
Ames Forester: Vol. 68
, Article 7.
Available at: https://lib.dr.iastate.edu/amesforester/vol68/iss1/7