The Photosystem II (PSII) photochemical efficiency (Yield PSII) was recorded at noon (\u0394F/Fm') and at dusk (Fv/Fm) on corals from the species Orbicella faveolata.
\nMeasurements were recorded on corals used in a reciprocal transplant experiment and on random colonies.\u00a0Data from three study sites are reported: Varadero at 3.5m depth (10\u00b018\u201923.3\u201dN, 75\u00b035\u201908.0\u201dW); Rosario at 12m depth (10\u00b011'12.1\"N, 75\u00b044'43.0\"W); and Cartagena Bay at 3m depth (10\u00b018'5.80\"N, 75\u00b034'37.10\"W).\u00a0Varadero and Rosario were both source and destination sites; Cartagena Bay was only a destination site.\u00a0
\nThe maximum quantum yield of PSII (Fv/Fm) was recorded at dusk and the effective quantum yield of PSII (\u0394F/Fm\u2019) at local noon during peak of sunlight exposure. Measurements were performed with a submergible Pulse Amplitud Modulated fluorometer (diving-PAM, Walz, Germany) on fragments used in a reciprocal transplant experiment and on colonies randomly distributed at similar depths compared to the transplant experiment. Three study sites with contrasting exposure to the Dique channel freshwater plume were considered: 1) Varadero reef at 3.5m depth close to the Dique channel mouth (10\u00b018\u201923.3\u201dN, 75\u00b035\u201908.0\u201dW), 2) Rosario reef at 12m depth as clear-control site located 21 km southwest of Varadero (10\u00b011'12.1\"N, 75\u00b044'43.0\"W), and 3) Cartagena Bay at 3m depth, the closest site to the Dique channel mouth (10\u00b018'5.80\"N, 75\u00b034'37.10\"W).
\nThe software WinControl-3 was used to operate and download the data from the diving-PAM.
These are primary data of the PSII photochemical efficiency (Yield PSII) recorded at noon (\u0394F/Fm') and at dusk (Fv/Fm) in\u00a0a reciprocal transplant experiment and on random colonies. The data reported\u00a0here were obtained from coral fragments used in a transplant experiment.
\nThe Varadero Reef is located south-west of the Cartagena Bay\u00a0close to the southern strait that connects the Bay to the Caribbean Sea in Colombia (10\u00b018\u201923.3\u201dN, 75\u00b035\u201908.0\u201dW). The Bay is a receiving estuary from the Magdalena River through the Canal del Dique, a man-made channel whose construction and operation dates back almost a century. Three study sites with contrasting light regimes were considered in order to evaluate the role of the light-environment perturbation associated with the Dique channel freshwater plume on the photosynthetic performance of corals from Varadero: 1) Varadero reef at 3.5m depth close to the Dique channel mouth (10\u00b018\u201923.3\u201dN, 75\u00b035\u201908.0\u201dW), 2) Rosario reef at 12m depth as clear-control site 21 km southwest from Varadero (10\u00b011'12.1\"N, 75\u00b044'43.0\"W), and 3) Cartagena Bay at 3m depth, the closest site to the Dique channel mouth and most turbid among the three sites (10\u00b018'5.80\"N, 75\u00b034'37.10\"W).
\nThese data were used in the manuscript \u201cDegradation of the underwater light environment: physiological and ecological consequences for reef corals\u201d submitted to the Journal Nature Communications Biology. [under review. 2019-12-28]
BCO-DMO Processing Notes:
\n- added conventional header with dataset name, PI name, version date
\n- modified parameter names to conform with BCO-DMO naming conventions
\n- reformatted date from m/d/yy\u00a0 to yyyy-mm-dd
\n- added ISO_DateTime_UTC column
\n- changed delta symbol (\u0394) to text 'delta'