Seabird populations provide a strong indicator of marine and island ecosystem health. The introduction of non-native predators to seabird colonies has contributed to the widespread decline of seabirds and to the disruption of ecosystems and communities where colonies have historically existed. Efforts to remove introduced predators and to restore seabird colonies have recently received increased funding and allocation of human resources. However, restoration goals are often not guided by basic ecological knowledge of the islands’ or seabird colonies’ unique ecosystems and communities. Simply restoring seabird numbers to an area after predator eradication may not be a sustainable solution if broader ecosystem processes and complex community structures are not also restored. In all seabird systems, seabirds act as vectors of marine nutrients, which influence terrestrial ecosystems and communities in different ways based on precipitation patterns and identity of dominant vegetation. Some seabird species also generate substantial belowground or aboveground physical disturbance. Both the nutrient loading and the disturbance regimes interact to create feedbacks within terrestrial communities, which may influence the success of seabird colony reestablishment. Plant life history traits, plant community composition and richness, and number and behavior of consumers all respond to the presence of seabirds, and, in some cases, facilitate seabird success. As we attempt to restore sustainable ecosystems in these historically bird dominated habitats we will need to have a more holistic approach to restoration that does not focus on a single metric, such as bird numbers, and that builds upon a broad and integrated understanding of the many ecosystem processes affected. This Organized Oral Session aims 1) to synthesize historical and current studies of the complex effects of seabirds on ecosystem processes, with a focus on cross-system comparisons and identification of global patterns; 2) to understand how ecosystem processes are disturbed when seabird predators are introduced, identifying unique effects among different groups of predators and seabirds; 3) to identify appropriate ecosystem restoration goals and effective methods for achieving these goals; and 4) to explore other global threats that challenge both natural and restored seabird ecosystems. The session will culminate in a panel discussion.