A niche is created by the intersection of resource constraints— an abstract resource space consisting of a unique combination of resources (information, access to materials, customers, and so on) that could permit a form to survive there. Forms thus either take advantage of a niche resource space or fail.

p. 40; cited in: Frank Marutollo (1990). Organizational Behavior in the Marine Corps. p. 33 - Organizations and Environments, 1979