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Edge Effect

Eliades, Angelo
http://deepgreenpermaculture.com/permaculture/permaculture-design-principles/10-edge-effect/

Publisher:  Deep Green Permaculture
Date Written:  13/01/2014
Year Published:  2014  
Resource Type:  Article

'Edge Effect’ is a Permacultural design prinicipal which uses edge and natural patterns for best effect.

Abstract: 

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Excerpts:

The edge effect is an ecological concept that describes how there is a greater diversity of life in the region where the edges two adjacent ecosystems overlap, such as land/water, or forest/grassland. At the edge of two overlapping ecosystems, you can find species from both of these ecosystems, as well as unique species that aren’t found in either ecosystem but are specially adapted to the conditions of the transition zone between the two edges.

For the sake of clarity, we must first define some key ecological terms.

An edge is the boundary or interface between two biological communities (e.g. forest and grassland) or between different landscape elements (e.g. land and water).
An ecotone is the transition zone along the edges of two adjacent ecological communities, where one ecological community meets the other (e.g. the area between forest and grassland). The transition from one ecosystem to the other can be a very gradual or a very sharp one.

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