<div><p>Hypothesis: that high pCO2 (76.6 Pa and 87.2 Pa vs. 42.9 Pa) has no effect on the metabolism of juvenile massive Porites spp. after 11 days at 28 °C and 545 µmol quanta/m^2/s. The response was assessed as aerobic dark respiration, skeletal weight (i.e., calcification), biomass, and chlorophyll fluorescence. Corals were collected from the shallow (3-4 m) back reef of Moorea, French Polynesia (17°28.614'S, 149°48.917'W), and experiments conducted during April and May 2011. An increase in pCO2 to 76.6 Pa had no effect on any dependent variable, but 87.2 Pa pCO2 reduced area-normalized (but not biomass-normalized) respiration 36%, as well as maximum photochemical efficiency (Fv/Fm) of open RCIIs and effective photochemical efficiency of RCIIs in actinic light (Delta F/F'm ); neither biomass, calcification, nor the energy expenditure coincident with calcification (J/g) was effected. These results do not support the hypothesis that high pCO2 reduces coral calcification through increased metabolic costs and, instead, suggest that high pCO2 causes metabolic depression and photochemical impairment similar to that associated with bleaching. Evidence of a pCO2 threshold between 76.6 and 87.2 Pa for inhibitory effects on respiration and photochemistry deserves further attention as it might signal the presence of unpredictable effects of rising pCO2.</p>
<p><a href="http://dmoserv3.whoi.edu/data_docs/MCR_LTER/Edmunds_2013_MarBio_Methods.pdf" target="_blank">Full methodology description</a></p>
<p> </p></div>
Porites growth, respiration, and photophysiology and seawater carbonate chemistry
<div><p>This data set tested the effect of 3 pCO2 levels on the metabolism of juvenile massive Porites spp. Conducted in Moorea, French Polynesia in April-May 2011. Aerobic dark respiration, skeletal weight (i.e., calcification), biomass, and chlorophyll fluorescence were measured as well as the experimental seawater carabonate parameters.</p>
<p>These data were published in Edmunds PJ. (2012) Effect of pCO2 on the growth, respiration, and photophysiology of massive <em>Porites</em> spp. in Moorea, French Polynesia. Marine Biology 159: 2149-2160.</p>
<p><a href="/objectserver/c00b67ba3cd703dda287a134d969b441/Data for MB 159, p 2149-2160.xlsx?url=http%3A%2F%2Fdmoserv3.whoi.edu%2Fdata_docs%2FMCR_LTER%2FData+for+MB+159%2C+p+2149-2160.xlsx&f=6262316130323832383239333132356534303737383535306234343036356163687474703a2f2f646d6f73657276332e77686f692e6564752f646174615f646f63732f4d43525f4c5445522f4461746120666f72204d42203135392c207020323134392d323136302e786c7378" target="_blank">Download data (Excel file)</a></p></div>
Porites growth_respiration_photophys
526785
Porites growth_respiration_photophys
2014-08-28T09:54:44-04:00
2014-08-28T09:54:44-04:00
2023-07-07T16:10:26-04:00
urn:bcodmo:dataset:526785
Porites growth, respiration, and photophysiology and seawater carbonate chemistry from Richard B Gump Research Station - Moorea LTER, French Polynesia from 2011 (MCR LTER project)
false
Edmunds, P. J. (2014) Porites growth, respiration, and photophysiology and seawater carbonate chemistry from Richard B Gump Research Station - Moorea LTER, French Polynesia from 2011 (MCR LTER project). Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 2014-08-22) Version Date 2014-08-22 [if applicable, indicate subset used]. http://lod.bco-dmo.org/id/dataset/526785 [access date]
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2014-08-22
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