Question

Which of the following is most likely to cause the greatest disruption to an ecosystem?

Emptying an aquarium containing non-native species into a local waterway



Cutting down a small cedar tree to make holiday decorations



Cleaning the windshield of a car with an alcohol-based glass cleaner



Mowing the lawn in a city park

Answer 1

Emptying an aquarium containing non-native species into a local waterway, this would cause a whole new group of species to inhabit the waterway.

Answer 2

Answer: Emptying an aquarium containing non-native species into a local waterway.

Emptying an aquarium containing non-native species into a local waterway will most likely to cause the greatest disruption to an ecosystem. A non-native species can be invasive and may disturb the already living native species in the waterway. The non-native species will compete with the native species for food, mates and habitat and can cause decrease in abundance and death of native species. Hence, it will disturb the ecosystem of the local waterway.