An important attribute of a species is the average number of offspring each adult is expected to produce. The parameter R will represent the reproductive rate, which can range from a value as small as 2 (for mammals and other higher animals) to as high as 10,000 or more (for plants with thousands of seeds).
The reproductive rate plays a role in the creation of a new generation. In the mathematical model, we assume the current generation produces offspring, where n is the size of the current generation. Of these, at most K survive to form the next generation.