Coral reef decline could cost US Hawaii billions by 2100

Climate change-driven coral reef decline could cost Hawaiʻi residents between $1.8 billion and $3 billion [1, 2] in lost reef-related activities by 2100 [1, 2].

This projection highlights the critical intersection of environmental degradation and economic stability. Because the state relies heavily on marine ecosystems for both tourism and local sustenance, the collapse of these reefs threatens the financial security of the region.

The estimated losses center primarily on recreation revenue [1, 2]. As coral health declines, the activities that draw visitors and support local businesses, such as diving and snorkeling, are expected to diminish. Researchers indicate that these economic burdens will not be shared equally across the population.

"These burdens will not fall equally, with lower-income and disadvantaged communities in the state facing disproportionate impacts," Dr. Emily Carter said.

Carter led the research published in Ecological Economics. The study emphasizes that while the aggregate loss is measured in billions, the impact on vulnerable populations is more severe because they often lack the resources to pivot to alternative economic activities.

The timeframe for these losses extends to the end of the century [1, 2]. However, the degradation of the reefs is an ongoing process driven by rising ocean temperatures and acidification. This environmental shift alters the biological makeup of the reefs, making them less attractive for recreation and less capable of supporting the marine life that fuels the local economy.

Experts said that the range of $1.8 billion to $3 billion [1, 2] reflects different climate scenarios, though all projections point toward significant financial instability if current trends continue.