Human Impacts on Ecosystems Practice Test

A city builds new storm drains that rapidly move water off streets into a small stream. Peak flows after storms become much higher, the stream channel erodes, and spawning gravel for fish is buried by sediment. Which human impact best describes this change?

A new four-lane highway cuts through a continuous temperate forest. Wildlife underpasses are not included, and the road creates multiple isolated forest patches. Over the next decade, biologists observe higher mortality of amphibians during road crossings and a decline in genetic diversity in a small mammal population on one side of the highway. Which consequence is most directly linked to the impact described?