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Maui Coral Reveals 250 Years of Land Impact
22 Oct
Summary
- Coral core shows reef growth mirrors land-based activities.
- Reef decline steepened with sugar plantation economy boom.
- Ancient coral chemistry reveals land use's impact on reefs.
A new study of a 253-year-old coral core from Maui offers a unique historical environmental baseline. Researchers found a direct correlation between the reef's growth and land-use changes on the island over 250 years.
This research period spans precolonial times, the sugar plantation economy, and Maui's tourism growth. The findings, published in 'Coral Reefs,' reveal the first long-term data on ridge-to-reef connectivity for Maui. Scientists pinpointed a steep decline in reef growth beginning in the late 1960s, coinciding with the peak of sugar plantation operations.
Analysis of trace elements within the coral's skeleton connected land activities to reef health. The study showed that factors like sediment and nutrient runoff from plantations negatively impacted the coral. This research provides crucial historical context for current conservation efforts aimed at protecting the Olowalu reef, a vital marine ecosystem.
