Final answer:
When birds and snapping turtles feed on the same species of minnow in a swamp ecosystem, it can result in competition for food and a decrease in population sizes of both species.
Step-by-step explanation:
When birds and snapping turtles feed on the same species of minnow in a swamp ecosystem, it will result in a competition for food between the two species. This competition can lead to a decrease in the population sizes of both birds and snapping turtles, as the available food resources are not enough to sustain both populations. The two species may also exhibit different feeding strategies or adapt to different habitats within the ecosystem to reduce competition.