Ecesis

Invasion is the complete or complex process of which migration, ecesis ❋ Robert Ezra Park (1926)

They restrict or prevent ecesis either by the destruction of invaders or by placing them at a disadvantage with respect to the occupants. ❋ Robert Ezra Park (1926)

Invasion into a new area or a plant community begins with migration when this is followed by ecesis. ❋ Robert Ezra Park (1926)

In new areas, ecesis produces reaction (the effect which a plant or a community exerts upon its habitat) at once, and this is followed by aggregation and competition, with increasing reaction. ❋ Robert Ezra Park (1926)

In the first place, an association acts as a barrier to the ecesis of species invading it from associations of another type, on account of the physical differences of the habitats. ❋ Robert Ezra Park (1926)

How far can the terms migration, ecesis, and competition, as used by ❋ Robert Ezra Park (1926)

Man and animals operate as marked barriers to ecesis wherever they alter conditions unfavorably to invaders or where they turn the scale in competition by cultivating, grazing, camping, parasitism, etc. ❋ Robert Ezra Park (1926)

They may affect invasion either by limiting migration or by preventing ecesis. ❋ Robert Ezra Park (1926)

In an area already occupied by plants, ecesis and competition are concomitant and quickly produce reactions. ❋ Robert Ezra Park (1926)

The significant feature of continuous invasion is that an outpost may be repeatedly reinforced, permitting rapid aggregation and ecesis, and the production of new centers from which the species may be extended over a wide area. ❋ Robert Ezra Park (1926)

The absence of pollinating insects is sometimes a curious barrier to the complete ecesis of species far out of their usual habitat or region. ❋ Robert Ezra Park (1926)