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Sensitivity of calcification to thermal stress varies among genera of massive reef-building corals.
PLoS One. 2012; 7(3):e32859.Plos

Abstract

Reductions in calcification in reef-building corals occur when thermal conditions are suboptimal, but it is unclear how they vary between genera in response to the same thermal stress event. Using densitometry techniques, we investigate reductions in the calcification rate of massive Porites spp. from the Great Barrier Reef (GBR), and P. astreoides, Montastraea faveolata, and M. franksi from the Mesoamerican Barrier Reef (MBR), and correlate them to thermal stress associated with ocean warming. Results show that Porites spp. are more sensitive to increasing temperature than Montastraea, with calcification rates decreasing by 0.40 g cm(-2) year(-1) in Porites spp. and 0.12 g cm(-2) year(-1) in Montastraea spp. for each 1°C increase. Under similar warming trends, the predicted calcification rates at 2100 are close to zero in Porites spp. and reduced by 40% in Montastraea spp. However, these predictions do not account for ocean acidification. Although yearly mean aragonite saturation (Ω(ar)) at MBR sites has recently decreased, only P. astreoides at Chinchorro showed a reduction in calcification. In corals at the other sites calcification did not change, indicating there was no widespread effect of Ω(ar) changes on coral calcification rate in the MBR. Even in the absence of ocean acidification, differential reductions in calcification between Porites spp. and Montastraea spp. associated with warming might be expected to have significant ecological repercussions. For instance, Porites spp. invest increased calcification in extension, and under warming scenarios it may reduce their ability to compete for space. As a consequence, shifts in taxonomic composition would be expected in Indo-Pacific reefs with uncertain repercussions for biodiversity. By contrast, Montastraea spp. use their increased calcification resources to construct denser skeletons. Reductions in calcification would therefore make them more susceptible to both physical and biological breakdown, seriously affecting ecosystem function in Atlantic reefs.

Authors+Show Affiliations

Unidad Académica de Sistemas Arrecifales, Instituto de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México, Puerto Morelos, Quintana Roo, México. carricart@cmarl.unam.mxNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

22396797

Citation

Carricart-Ganivet, Juan P., et al. "Sensitivity of Calcification to Thermal Stress Varies Among Genera of Massive Reef-building Corals." PloS One, vol. 7, no. 3, 2012, pp. e32859.
Carricart-Ganivet JP, Cabanillas-Terán N, Cruz-Ortega I, et al. Sensitivity of calcification to thermal stress varies among genera of massive reef-building corals. PLoS ONE. 2012;7(3):e32859.
Carricart-Ganivet, J. P., Cabanillas-Terán, N., Cruz-Ortega, I., & Blanchon, P. (2012). Sensitivity of calcification to thermal stress varies among genera of massive reef-building corals. PloS One, 7(3), e32859. https://doi.org/10.1371/journal.pone.0032859
Carricart-Ganivet JP, et al. Sensitivity of Calcification to Thermal Stress Varies Among Genera of Massive Reef-building Corals. PLoS ONE. 2012;7(3):e32859. PubMed PMID: 22396797.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Sensitivity of calcification to thermal stress varies among genera of massive reef-building corals. AU - Carricart-Ganivet,Juan P, AU - Cabanillas-Terán,Nancy, AU - Cruz-Ortega,Israel, AU - Blanchon,Paul, Y1 - 2012/03/01/ PY - 2011/10/21/received PY - 2012/01/31/accepted PY - 2012/3/8/entrez PY - 2012/3/8/pubmed PY - 2012/7/24/medline SP - e32859 EP - e32859 JF - PloS one JO - PLoS ONE VL - 7 IS - 3 N2 - Reductions in calcification in reef-building corals occur when thermal conditions are suboptimal, but it is unclear how they vary between genera in response to the same thermal stress event. Using densitometry techniques, we investigate reductions in the calcification rate of massive Porites spp. from the Great Barrier Reef (GBR), and P. astreoides, Montastraea faveolata, and M. franksi from the Mesoamerican Barrier Reef (MBR), and correlate them to thermal stress associated with ocean warming. Results show that Porites spp. are more sensitive to increasing temperature than Montastraea, with calcification rates decreasing by 0.40 g cm(-2) year(-1) in Porites spp. and 0.12 g cm(-2) year(-1) in Montastraea spp. for each 1°C increase. Under similar warming trends, the predicted calcification rates at 2100 are close to zero in Porites spp. and reduced by 40% in Montastraea spp. However, these predictions do not account for ocean acidification. Although yearly mean aragonite saturation (Ω(ar)) at MBR sites has recently decreased, only P. astreoides at Chinchorro showed a reduction in calcification. In corals at the other sites calcification did not change, indicating there was no widespread effect of Ω(ar) changes on coral calcification rate in the MBR. Even in the absence of ocean acidification, differential reductions in calcification between Porites spp. and Montastraea spp. associated with warming might be expected to have significant ecological repercussions. For instance, Porites spp. invest increased calcification in extension, and under warming scenarios it may reduce their ability to compete for space. As a consequence, shifts in taxonomic composition would be expected in Indo-Pacific reefs with uncertain repercussions for biodiversity. By contrast, Montastraea spp. use their increased calcification resources to construct denser skeletons. Reductions in calcification would therefore make them more susceptible to both physical and biological breakdown, seriously affecting ecosystem function in Atlantic reefs. SN - 1932-6203 UR - https://www.unboundmedicine.com/medline/citation/22396797/Sensitivity_of_calcification_to_thermal_stress_varies_among_genera_of_massive_reef_building_corals_ L2 - http://dx.plos.org/10.1371/journal.pone.0032859 DB - PRIME DP - Unbound Medicine ER -