Seabird guano is a vital nutrient source that drives "biogeomorphic feedbacks," shifting plant communities toward sediment-stabilizing species that physically reshape coastal landscapes. Van Rees and others demonstrate that guano-derived nitrogen enhances vegetation productivity and sediment retention, particularly in nutrient-poor sandy environments. These findings suggest that declining seabird populations could indirectly accelerate habitat loss due to the critical role of seabirds as "ecosystem engineers" who help build the very landscapes they depend on for survival, which has clear conservation implications.