Question

scientists observed that the populations of top - level consumers in a particular ecosystem were rapidly decreasing.further studies revealed that there was also a decline in producer productivity. which other changes did the scientists most likely observe in the ecosystem?a) increased producer diversityb) decreased population size at all levelsc) decreased primary consumer populations onlyd) increased primary and secondary consumer diversity

Explanation:

When top - level consumers decline, the population of their prey (secondary consumers) may increase. This increase in secondary consumers will then over - consume primary producers. As a result, there will be a decrease in primary producer populations. This chain of events disrupts the balance of the ecosystem, and the change in primary producer populations (a key part of the food web) is likely to be observed.

Answer:

b) decreased population size at all levels