Growth rates of Florida corals from 1937 to 1996 and their response to climate change

Kevin P. Helmle (), Richard E. Dodge, Peter K. Swart, Dwight K. Gledhill and C. Mark Eakin
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Kevin P. Helmle: Oceanographic Center, National Coral Reef Institute, Nova Southeastern University, 8000 N Ocean Drive, Dania Beach, Florida 33004, USA.
Richard E. Dodge: Oceanographic Center, National Coral Reef Institute, Nova Southeastern University, 8000 N Ocean Drive, Dania Beach, Florida 33004, USA.
Peter K. Swart: Rosenstiel School of Marine and Atmospheric Science, University of Miami, 4600 Rickenbacker Causeway, Miami, Florida 33149, USA.
Dwight K. Gledhill: Cooperative Institute for Marine and Atmospheric Studies, Rosenstiel School of Marine and Atmospheric Science, University of Miami, 4600 Rickenbacker Causeway, Miami, Florida 33149, USA.
C. Mark Eakin: NOAA Coral Reef Watch, National Oceanic and Atmospheric Administration Center, E/RA31, SSMC1, 1335 East West Hwy, Silver Spring, Maryland 20910, USA.

Nature Communications, 2011, vol. 2, issue 1, 1-6

Abstract: Abstract Ocean acidification causes declines in calcification rates of corals because of decreasing aragonite saturation states (Ωarag). Recent evidence also indicates that increasing sea surface temperatures may have already reduced growth and calcification rates because of the stenothermic threshold of localized coral populations. Density banding in coral skeletons provides a record of growth over the coral's lifespan. Here we present coral extension, bulk density and calcification master chronologies from seven subtropical corals (Montastraea faveolata) located in the Florida Keys, USA with a 60-year common period, 1937–1996. Linear trends indicate that extension increased, density decreased and calcification remained stable while the most recent decade was not significantly different than decadal averages over the preceding 50 years for extension and calcification. The results suggest that growth rates in this species of subtropical coral have been tolerant to recent climatic changes up to the time of collection (1996).

Date: 2011
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DOI: 10.1038/ncomms1222

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