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.'

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.

本数据集采集的数据旨在获取加勒比海4处不同站点的高分辨率pH与溶解氧实测数据。其中3处站点位于伯利兹的中美洲珊瑚礁（Mesoamerican Reef），剩余1处站点位于多米尼克。每套监测平台均集成微流控芯片实验室（microfluidic lab-on-chip, LOC）pH传感器（Yin等, 2021），以及带泵送功能的电导率-温度-溶解氧（conductivity, temperature and dissolved oxygen, CT-DO）传感器（型号为SBE 37 SMP ODO MicroCAT，产自美国华盛顿州贝尔维尤的Seabird Scientific公司）。供电采用定制可充电镍氢电池组，封装于符合100米水深耐压标准的聚氯乙烯（PVC）外壳内。各观测站周边的底栖生态群落组成，通过高分辨率水下相机拍摄的海底照片进行表征。在伯利兹，潜水员或浮潜人员于平台部署后即刻使用GoPro Hero 3+拍摄海底照片。在多米尼克，则将GoPro安装于小型遥控水下机器人（Remotely Operated Vehicle, DeepTrecker）上，从船舷侧方下放设备，并从录制的视频中截取屏幕画面；多米尼克的照片拍摄于2019年10月3日（平台部署后1~2年）。底栖生物与基质类型采用基于Excel扩展工具的珊瑚点计数法（Coral Point Count with Excel Extensions）进行判定（Kohler与Gill, 2006）。伯利兹的3处站点各加载4张照片，多米尼克站点则加载13张屏幕截取画面。对每张照片构建8×8的网格，在每个网格单元内随机布设1个采样点，随后参照底栖生物csv文件中指定的11个类别，人工识别每个采样点对应的海洋底栖生物或基质类型。本数据集配套共6个csv格式文件：1. Cryer_et_al_pH_DO_Caribbean_Metadata：元数据文件，对后续数据集文件的表头信息与数据采集流程进行说明；2. Cryer_et_al_pH_DO_Caribbean_GoffsCayeForeReef：伯利兹戈夫斯礁前礁的实测数据，同步包含1份离散总碱度样品的测试结果；3. Cryer_et_al_pH_DO_Caribbean_GoffsCayeBackReef：伯利兹戈夫斯礁后礁的实测数据，同步包含1份离散总碱度样品的测试结果；4. Cryer_et_al_pH_DO_Caribbean_EnglishCaye：伯利兹英吉利礁后礁的实测数据；5. Cryer_et_al_pH_DO_Caribbean_Dominica：多米尼克苏弗里耶尔附近后礁的实测数据；6. Cryer_et_al_pH_DO_Caribbean_Benthos：通过珊瑚点计数法对各礁区海底照片分析得到的底栖生物组成数据。