The term for organisms that are adapted to and flourish in a particular environment is "specialists." Specialists are species that have evolved specific traits that allow them to thrive in particular habitats or ecological niches. For example, certain plants may be adapted to thrive in nutrient-poor soils, while animals may evolve traits that allow them to exploit specific food sources or environmental conditions. While specialists can efficiently utilize resources in their unique environments, they may be more vulnerable to changes or disturbances, such as habitat destruction or climate change, compared to generalists, which can adapt to a wider range of conditions.