A niche is not merely a location.

Nor is it simply a collection of environmental conditions.

APS interprets a niche as an organised set of opportunities and constraints through which continuity becomes possible.

Resources, hazards, ecological relationships, and environmental structures combine to create conditions under which particular forms of life can persist.

Different organisms therefore inhabit different niches even within the same physical environment because different organisms depend upon different conditions for continuity.

A niche exists relative to the continuity requirements of an organism.

For this reason, niches are not simply environmental spaces. They are organisations of ecological significance that create different affordances, opportunities, and constraints for different forms of life.

Ecological organisation is shaped not only by environments but by the opportunities and constraints those environments create for organised persistence.