Galápagos coral reef persistence after ENSO warming across an acidification gradient

DOI

Anthropogenic CO2 is causing warming and ocean acidification. Coral reefs are being severely impacted, yet confusion lingers regarding how reefs will respond to these stressors over this century. Since the 1982-1983 El Niño-Southern Oscillation warming event, the persistence of reefs around the Galápagos Islands has differed across an acidification gradient. Reefs disappeared where pH<8.0 and aragonite saturation state (Omega arag)8.0 and Omega arag>3. Where upwelling is greatest, calcification by massive Porites is higher than predicted by a published relationship with temperature despite high CO2, possibly due to elevated nutrients. However, skeletal P/Ca, a proxy for phosphate exposure, negatively correlates with density (R=-0.822, p<0.0001). We propose that elevated nutrients have the potential to exacerbate acidification by depressing coral skeletal densities and further increasing bioerosion already accelerated by low pH.

In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Gattuso et al, 2015) was used to compute a complete and consistent set of carbonate system variables, as described by Nisumaa et al. (2010). In this dataset the original values were archived in addition with the recalculated parameters (see related PI). The date of carbonate chemistry calculation is 2015-07-03.

Supplement to: Manzello, Derek P; Enochs, I C; Bruckner, Andrew; Renaud, Philip G; Kolodziej, Graham; Budd, David A; Carlton, R; Glynn, Peter W (2014): Galápagos coral reef persistence after ENSO warming across an acidification gradient. Geophysical Research Letters, 41(24), 9001-9008

Identifier
DOI https://doi.org/10.1594/PANGAEA.847762
Related Identifier https://doi.org/10.1002/2014GL062501
Related Identifier https://cran.r-project.org/package=seacarb
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.847762
Provenance
Creator Manzello, Derek P ORCID logo; Enochs, I C; Bruckner, Andrew; Renaud, Philip G; Kolodziej, Graham; Budd, David A; Carlton, R; Glynn, Peter W
Publisher PANGAEA
Contributor Yang, Yan
Publication Year 2014
Rights Creative Commons Attribution 3.0 Unported; https://creativecommons.org/licenses/by/3.0/
OpenAccess true
Representation
Resource Type Supplementary Dataset; Dataset
Format text/tab-separated-values
Size 260 data points
Discipline Earth System Research