Coastal Erosion Reveals Systemic Vulnerability: Hawaii Sea Arch Collapse Highlights Climate‑Driven Shoreline Instability and Indigenous Stewardship Gaps

Native Hawaiian ahupua’a systems traditionally managed watershed‑to‑sea gradients, using lo‘i kalo terraces and coastal fishponds to buffer shorelines and monitor change through oral chants (oli) and kapu restrictions. Contemporary neglect of these practices has removed low‑tech sediment traps and community‑based early warning, leaving cliffs exposed to erosive forces. Reviving indigenous stewardship would restore sediment retention, enhance reef health, and embed cultural monitoring into NPS protocols.