During the life cycle of an individual sparrow, the individual makes a series of decisions based on its current state as well as the current state of its environment (see Model Main Page - Decision Flow Chart). These decisions are constrained by both demographic and behavioral life history traits. These traits influence the sparrow's ability to breed and determine the overall population dynamics.
As the sparrow moves across the landscape in order to complete various stages of its life history, it is also influenced by a number of stochastic events that will effect the survival of the sparrow as well as it ability to find mates and breed. These stochastic events interact with life history traits to influence an individual sparrow's life history. Overall, the interaction of demography, behavior and stochasticity within an individual's lifetime determine the fitness of the individual.
SIMSPAR contains a number of demographic (e.g., nesting cycle, number of broods, mortality) parameters as well as a number of behavioral parameters (e.g., dispersal distances, probability of mating). A sparrow, within SIMSPAR, is also influenced by the inherent stochasticity of its environment. Thus, SIMPSPAR incorporates various life history traits of the Cape Sable seaside sparrow as well as the stochasticity of the environment to model sparrow population dynamics on a individual basis.