Ecosystem engineers, such as beavers and coral reefs, play a crucial role in maintaining habitats by altering their environment to create suitable conditions for other species. By constructing dams or reefs, these organisms enhance biodiversity and contribute to ecosystem stability. Their activities can lead to the formation of new habitats, such as wetlands or estuaries, that support various flora and fauna. Additionally, these engineers often help with nutrient cycling and provide essential resources, like food and shelter, for many organisms. Their presence is essential for ecological balance and resilience.