ecesis(biological invasion) The ability of some migrating plant species, having arrived at a new site, to germinate, grow, and reproduce successfully, while others fail to become established in the new environment. It represents the third in a series of six phases in plant succession. The associated verb is to ecize.

ecesis The ability of some migrating plant species, having arrived at a new site, to germinate, grow, and reproduce successfully, while others fail to become established in the new environment. It represents the third in a series of 6 phases in plant succession.