Long-term observations of coral reefs indicate rising sea levels “not only promoted coral cover” but also “limit damaging effects of thermally-induced bleaching” (Brown et al., 2019).
This new paper is an expansion of the research conducted by the same lead author in 2011 (Brown et al.).
Brown and colleagues concluded a growth in coral cover is positively correlated with rising sea levels.
The authors further suggest “the overall picture for these shallow coral reefs is a positive one” due to rising sea levels and rapid recovery rates.
Another new study (Zinke et al., 2019) indicates there is no correlation between coral growth rates (calcification, skeletal density) and long-term (since 1910) changes in sea surface temperatures.
In other words, a regional warming trend in the tropical Atlantic has not been associated with a decline in coral cover.
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It might be true that raising seas help protect coral reefs, but this will be minimal. That is because the sea level rise is minimal. In general, we need to remember that all life is here today because it survived much warmer and much colder periods in the past.
I’m pretty sure that if we cooled the planet enough like in the ice age, the coral would be above sea level and die.
But that common sense doesn’t matter, since CO2 plant food is not what causes the warm/cold cycle anyway. Little hint: it’s the sun.