Dataset in support of the article 'Characterising reef net metabolism via the diel co-variation of pH and dissolved oxygen from high resolution in situ sensors.'

Abstract

Data were collected to obtain high-resolution pH and dissolved oxygen measurements on four different sites in the Caribbean. Three sites on the Mesoamerican Reef in Belize and a single site in Dominica. Each platform includes a microfluidic lab-on-chip (LOC) pH sensor (Yin et al., 2021) and a pumped conductivity, temperature and dissolved oxygen (CT-DO) sensor (SBE 37 SMP ODO MicroCAT; Seabird Scientific, Bellevue WA, USA). Power was provided by a custom-made rechargeable Ni-MH battery pack enclosed within a PVC 100 m depth rated housing. Benthic ecosystem assemblages around each observatory were characterized from seabed photographs taken using high resolution underwater cameras. In Belize, photos were taken using a GoPro Hero 3+ by scuba divers or snorkelers immediately after platform deployment. In Dominica, a GoPro mounted on a mini Remotely Operated Vehicle (DeepTrecker) was deployed over the side of the boat and screengrabs were taken from recorded video. Dominica photos were taken on 10/03/2019 (1-2 years post deployment). Benthos and substrate were determined using Coral Point Count with Excel Extensions (Kohler and Gill, 2006). Four photos were loaded for each of the Belize sites and 13 screengrabs for Dominica. For each photo an 8 x 8 grid was constructed and within each cell, a point was randomly distributed. The marine benthos or substratum for each point was then identified manually under 11 categories as specified in the benthos csv file. There are six csv files associated: Cryer_et_al_pH_DO_Caribbean_Metadata - Metadata file explaining headers and data collection for the following dataset files. Cryer_et_al_pH_DO_Caribbean_GoffsCayeForeReef - Data collected on the fore reef of Goff’s Caye, Belize using sensors above. Additionally there is a single total alkalinity measurement from a discrete sample. Cryer_et_al_pH_DO_Caribbean_GoffsCayeBackReef - Data collected on the back reef of Goff’s Caye, Belize using sensors above. Additionally there is a single total alkalinity measurement from a discrete sample. Cryer_et_al_pH_DO_Caribbean_EnglishCaye - Data collected on the back reef of English Caye, Belize using sensors above. Cryer_et_al_pH_DO_Caribbean_Dominica - Data collected on the back reef near Soufriere, Dominica using sensors above. Cryer_et_al_pH_DO_Caribbean_Benthos - Benthic composition collected from photographs of reef sites using Coral Point Count.

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