Marine heatwaves & coral bleaching

Names and classification

Record type

threat

Kauaʻi occurrence and status

Recorded state

Recurring / regionwide risk

Threats and conservation

Pressure source

Elevated sea-surface temperature and thermal stress

Exposure pathway

Heat stress disrupts coral-algal symbiosis and can cause bleaching/mortality

Consequences

Bleaching, mortality, reduced reef complexity and resilience

Affected requirements

Coral survival, calcification, recruitment and reef structure

Susceptibility

Shallow coral reefs and reef-dependent communities

Reversibility

Partial recovery possible between events; repeated severe heat can prevent recovery

Early warning indicators

Degree-heating weeks; bleaching prevalence; mortality; coral recruitment

Conservation interventions

Implementation limits

Magnitude, exposure and trend are not assumed uniform across Kauaʻi; local evidence governs.

Sources and further reading

• https://www.fisheries.noaa.gov/national/habitat-conservation/shallow-coral-reef-habitat
• https://www.fisheries.noaa.gov/pacific-islands/ecosystems/coral-reefs-pacific

Connected Atlas records

• Coral reef & colonized hardbottom ecosystem · Ecosystems
• Reef flat, backreef & lagoon mosaic · Ecosystems
• Nearshore pelagic coastal-water ecosystem · Ecosystems
• Coral restoration & resilience enhancement · Threats & Conservation
• Long-term ecological monitoring & adaptive management · Threats & Conservation