Maintenance of gene flow can be achieved by the direct augmentation of populations or establishment of populations at previous or new sites with germplasm sourced from a number of different populations.
This points to augmentation of urban population and reduction of rural population.
Average urbanisation rate in Croatia stands at 56%, with augmentation of urban population and reduction of rural population.
In violets (Viola), in addition to the ordinary flowers produced first during the usual flowering season, less conspicuous flowers later develop; called cleistogamous flowers, they do not open but are self-pollinated, thus ensuring augmentation of the population during a period less favourable for the usual blossoms.
Even if S2 does not invade S1, the new security situation created by the change of borders (and the augmentation of S2s population) may make S1 subject to domination by S2.
Based on this, augmentation of small populations with germplasm from larger populations has been listed as a management action in the R. leptorrhynchoides species Recovery Plan (NSW DEC 2010).
Given such very strong genetic differentiation, that would have severe consequences for fitness if diploid and tetraploid populations were mixed, we would recommend that augmentation of small populations can only proceed once the cytogenetic make up of both target and source populations has been established.
Recovery of an imperiled plant species may require augmentation of existing populations or creation of new ones.
Populations within the Serengeti-Mara Ecosystem remain low and augmentation of the current population has been proposed.
Pest and disease management is attained by means of the encouragement of a balanced host/predator relationship, augmentation of beneficial insect populations, biological and cultural control and mechanical removal of pests and affected plant parts.
