The Law of Limiting Resources
An object lying in disuse in every possible habitat is obviously not a resource. But in every environment every individual and its group (population or species) uses the available resources to its maximum and to their optimum. And every unused object (read resource) imports users (Niche occupation) or is exported out of the system till the resource can support no more users or cannot be exported economically any further. Thus the Law of Limiting Resources. But within a community a resource is used by every individual of the population and by individuals of other populations and by indviduals and populations of other species!?! Leading us into a reason for the limit on the resource - Competition.