Names as reported by the authors; no accepted-taxon or specimen-identity claim.
Reading the evidence
These records describe traits and results under specific study conditions. They do not establish recommended aquarium settings.
What the study tells us
Low-flow oxygen boundary layers thickened differently among three species. The acidification interaction in Acropora was not reproduced in the other species. These flume velocities are exposures, not pump settings for an aquarium.
Study conditions
Three parent colonies per species; three 120 L tanks per ambient/OA pH treatment, nine fragments per species per treatment; 15–18 weeks conditioning. Approximately 26 degrees C, salinity 35, tank irradiance 176 ± 31 micromol photons m−2 s−1, 11:13 light:dark. Sequential oxygen/pH microsensor profiles in light/dark at 2 and 6 cm s−1 unidirectional flume flow; n=9 profiles per species/profile condition/treatment.
Methods and evidence class
controlled captive experiment
Oxygen and pH microsensor profiles in a flume after pH preconditioning; 2 and 6 cm s−1 bulk flow, light/dark, mixed-effects analyses. Profiles from one fragment are not independent colonies.
Findings
obs-pmc11148076-01
At 2 versus 6 cm s−1, oxygen concentration boundary layers were thicker by 61% in Acropora cytherea, 55% in Pocillopora verrucosa and 159% in Porites cylindrica (all reported p less than 0.001). The effect was species-dependent.
Measurements and uncertainty
{"group": "A. cytherea / P. verrucosa / P. cylindrica", "metric": "oxygen boundary-layer thickness increase low versus moderate flow", "uncertainty": "all p<0.001", "unit_as_published": "%", "value_as_published": "61 / 55 / 159"}
Where to find it in the paper
Results / Effects of water flow and ocean acidification on boundary layer thickness | ./body/sec[3]/sec[2]/p[1]
Acropora oxygen boundary-layer thickness doubled under OA versus control at low flow, but remained stable between pH treatments at moderate flow; Pocillopora and Porites did not show significant oxygen-layer differences between pH treatments. This interaction does not establish a universal OA buffering response.
Where to find it in the paper
Results / Effects of water flow and ocean acidification on boundary layer thickness | ./body/sec[3]/sec[2]/p[2]
Profiles are repeated measurements, not 356 independent corals; source parent-colony replication is three per species.
Only Acropora had both control and OA pH profiles; no full pH-treatment comparison in the other species.
Microscale flow was not directly characterized and oxygen/pH gradients were not measured simultaneously. Bulk cm/s cannot be converted to pump turnover without tank geometry.
Boundary-layer traits are mechanisms, not demonstrated growth/health optima.
All flow, light/dark and OA profiles share fragments and the conditioning experiment; sequential profiles count as repeated measures.
Evidence family: study-pmc11148076
Method passage locators
Materials and methods / Experimental design | ./body/sec[2]/sec[1]/p[1]
Materials and methods / Experimental setup and treatment conditions | ./body/sec[2]/sec[2]/p[1]
Materials and methods / Microsensor measurements | ./body/sec[2]/sec[3]/p[1]
Materials and methods / Microsensor measurements | ./body/sec[2]/sec[3]/p[2]
Materials and methods / Microsensor measurements | ./body/sec[2]/sec[3]/p[3]