To solve the given question, which is about trophic interactions in an ecological community, we need to logically deduce the impact of pond fish presence on plant fitness based on the given food chain:
- Identify the Trophic Interactions:
- Dragonflies eat plant pollinators. This means that dragonflies can reduce the pollinator population, thereby potentially reducing plant pollination and fitness.
- Fish eat dragonfly larvae. This means that in ponds with fish, the dragonfly population is likely controlled or reduced because fish prey on their larvae.
- Impact on Plant Fitness:
- In ponds without fish, dragonflies likely have a higher population, thus consuming more pollinators, leading to reduced pollination and therefore, possibly lower plant fitness.
- Conversely, in ponds with fish, the dragonfly population is controlled, allowing for a greater presence of pollinators, which can enhance plant pollination and thus increase plant fitness.
- Conclusion:
Based on this analysis, plants growing near ponds with fish are likely to have higher fitness due to the reduced dragonfly population, which allows for more effective pollination. Hence, the correct answer is that plants growing near ponds with fish have higher fitness.
This analysis is grounded on the concept of a trophic cascade, where the presence of a predator (fish) has indirect positive effects on plant fitness by managing intermediate consumers (dragonfly larvae).
Important Questions from Community interactions
- A native species of butterfly at one site in North America used to feed on plant species P. In the 1960s, an exotic plant species Q was introduced at this site. The butterfly switched to feeding on Q, so much so that it was no longer found feeding on P. When the plant species Q was removed from the site in the 1990s, the butterfly species went locally extinct. Later, a population of the same butterfly species from elsewhere, that still fed on plant P, came and occupied the same site. Which one or more of the processes listed below has/have occurred here?
- Which one of the following is a result of antagonistic coevolution?
- Observations of algal species showed that their diversity was higher in pools where there were grazing snails compared to pools without snails. Which one of the following statements best explains this result?
- Which one of the following ecological processes best explains the observation thatseedling establishment increases with distance from the parent tree in a forest?
- Depending on soil nutrient availability, which one or more of the following interaction(s) can occur between soil mycorrhizal fungi and plants?
