What is an example of cooperation coniferous forest?

An example of cooperation in a coniferous forest is the relationship between Douglas firs and Western red cedar trees. Douglas firs have shallow roots that are susceptible to drying out, while Western red cedars have deep roots that can access water from lower levels of soil. In times of drought, Douglas firs can send their roots close to the roots of Western red cedars and absorb water from the deeper soil layers. In return, Western red cedars benefit from the shade provided by Douglas firs, which helps them avoid water loss through excessive transpiration. This cooperative relationship allows both species to survive in drought-prone environments.