Warming and acidification squeeze coral habitat
Modeled coral-reef suitability falls about 27–30% in shallow water by 2070, worst in the Western Pacific Warm Pool.
Source
Future habitat suitability for coral reef ecosystems under global warming and ocean acidification
What they did
Trained MaxEnt and boosted-regression-tree envelopes at 1° resolution, then projected SST and aragonite saturation separately and together from 2010 to 2070 under A2, A1B, and B1 emissions.
What they found
Presence-cell suitability above 0.5 fell from 77% in 2010 to 54% by 2070; SST maxima dominate the loss; acidification alone is milder; Indian Ocean and Atlantic reefs fare better than the Coral Triangle.
The limits
What it doesn't show
Does not simulate bleaching physiology, local pollution, or thermal adaptation of individual coral species.
Key terms
- Aragonite saturation (Ω Arag)
- How saturated seawater is with respect to the CaCO3 form corals use.
- Bioclimatic envelope
- Statistical climate space associated with where an ecosystem occurs.
- BRT
- Boosted regression trees, a machine-learning habitat model.
- WPWP
- Western Pacific Warm Pool, including the Coral Triangle.
- Ocean acidification
- Falling seawater pH and carbonate saturation from extra CO2.
- Marginal reef
- Reef living near environmental limits, often at higher latitude.
Flashcards
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Quiz yourself
Presence-cell suitability ≥0.5 by 2070 was about:
Common questions
Suitability ≥0.5 in 2010 vs 2070?
77% down to 54% of presence cells.
Shallow-water decline?
27–30% over ~60 years.
Worst region?
Western Pacific Warm Pool / Coral Triangle.
Main driver?
Short-term SST maxima.
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