Alternative forms: =oecesis, n.
¦plant colonization, n.
- (Sensu lato) First stage of plant succession (i.e. germination and successful establishment of colonisation).
(Sensu stricto) In a glacier forefield after the retreat of a glacier, estimate of the elapsed time between deglaciation (or moraine formation and stabilization) and the germination of the first tree to survive and be sampled (i.e. the oldest tree on the surface). (≈ McCarthy and Luckman 1993)