Final answer:
The extinction of species A may not have resulted in a decrease in their predators due to the availability of other prey or a switch in predator preference. The lack of a big effect on the community could be attributed to the small population size or limited interactions of species A.
Step-by-step explanation:
In this scenario, the extinction of species A did not result in a decrease in their predators because there might have been other prey available for the predators, or they might have switched to preying on other species in the community. The lack of a big effect on the community could be due to several factors. For example, if species A had a small population size or limited interactions with other species, their extinction may not have had a significant impact on the overall community dynamics.