biocoenosis

noun

1. A community of interacting organisms that form a natural ecological unit.

   “The semidark cave biocoenosis is typically found at (or in proximity to) the entrance of caves and even under caverns and overhangs that, topographically speaking, would not be characterized as true caves.”

   “Within a given spatiotemporal unit, a biocoenosis is a system comprising several populations of distinct interacting species.”