Ecosystem Services Practice Test

Ecosystems provide services that support human and ecosystem well-being. A classroom terrarium model shows plants, soil, and decomposers (worms and fungi). Dead leaves fall onto the soil and are broken down. Later, the plants grow taller without adding new soil. Which ecosystem service is best supported by the evidence in this model?

Ecosystems provide services that support human and ecosystem well-being. In a coastal ecosystem model, sand dunes covered with beach grass sit between the ocean and houses. During a storm, waves hit the dunes, and the dunes reduce how far water and sand move inland. People and nesting shorebirds are shown behind the dunes. Which ecosystem service is shown?