Ecosystem engineering refers to the process by which certain organisms, known as ecosystem engineers, modify their environment, creating new habitats and influencing the availability of resources for other species. These changes can be physical, such as building structures or altering soil composition, and can significantly impact the ecosystem's structure and function. Common examples of ecosystem engineers include beavers, which create wetlands by building dams, and coral reefs, formed by tiny coral polyps that provide habitat for diverse marine life. Through their activities, these organisms play a crucial role in maintaining biodiversity and ecosystem health.