Fig. 3

Two consumers and a single resource. Parameters, given in the text, are the same for both plots, the only difference is the supply level of the resource. Also the starting point is the same, no food, much of B and a little bit of A. In both cases A successfully takes over from B. If the stable resource level is below the critical level for maintenance of B (a), this consumer simply disappears, and at some later time A grows to its stationary level. If the supply of resource is sufficient to support B (b), there is an interval where a finite population B survives on the available resource. The decline of the species B is in fact brought about by its competitor A eating away the required food. Eventually a higher population of A is reached because of a higher supply