Question

a certain population of bluebirds eats spiders as a major food source. which of the following ecosystem changes would impact this population of bluebirds the most? a. an increase in the fish population b. an increase in the spider and insect population c. a decrease in the rabbit population d. a decrease in the number of daylight hours

Explanation:

Since spiders are the major food source for bluebirds, an increase in spider and insect population (which are likely part of the same food web and could be related in terms of resources or habitat) would directly impact the bluebird population. An increase in fish population (A) is likely in a different habitat (aquatic vs. likely terrestrial for bluebirds eating spiders). A decrease in rabbit population (C) is likely not directly related as rabbits are not part of the bluebird - spider food chain. A decrease in daylight hours (D) has a more general and less direct impact compared to the food - source related change.

Answer:

B. an increase in the spider and insect population