Have coral calcification rates slowed in the last twenty years?

Ridd, Peter V., da Silva, Eduardo Teixeira, and Stieglitz, Thomas (2013) Have coral calcification rates slowed in the last twenty years? Marine Geology, 346. pp. 392-399.

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Abstract

This paper reports a reanalysis of calcification rates of 328 Porites cores from the Great Barrier Reef from which previous workers have concluded that a 14% reduction in calcification rates has occurred between 1990 and 2005. In this reanalysis it is shown that the apparent reduction in the Porites spp. calcification rate in the last two decades is at least partly due to a combination of (a) ontogenetic effects (disregarded in the previous analysis), combined with a highly variable age distribution of the coral growth bands with time, and (b) a systematic data bias clearly evident in the last growth band of each core. When the outermost growth band in addition to bands which have record age less than 20 years was excluded from the analysis, the dramatic fall in calcification after 1990 was no longer evident.

Item ID: 32622
Item Type: Article (Refereed Research - C1)
Keywords: coral; calcification; Great Barrier Reef; ocean acidification; ocean pH
ISSN: 1872-6151
Date Deposited: 22 Apr 2014 04:55
FoR Codes: 04 EARTH SCIENCES > 0405 Oceanography > 040503 Physical Oceanography @ 100%
SEO Codes: 96 ENVIRONMENT > 9605 Ecosystem Assessment and Management > 960503 Ecosystem Assessment and Management of Coastal and Estuarine Environments @ 100%
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