ecesis

In an area already occupied by plants, ecesis and competition are concomitant and quickly produce reactions.

Introduction to the Science of Sociology 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.

Introduction to the Science of Sociology 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.

Introduction to the Science of Sociology Robert Ezra Park 1926

They may affect invasion either by limiting migration or by preventing ecesis.

Introduction to the Science of Sociology Robert Ezra Park 1926

How far can the terms migration, ecesis, and competition, as used by

Introduction to the Science of Sociology 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.

Introduction to the Science of Sociology 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.

Introduction to the Science of Sociology Robert Ezra Park 1926

Invasion is the complete or complex process of which migration, ecesis

Introduction to the Science of Sociology Robert Ezra Park 1926

Invasion into a new area or a plant community begins with migration when this is followed by ecesis.

Introduction to the Science of Sociology 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.

Introduction to the Science of Sociology Robert Ezra Park 1926