Dataset: Seawater temperature and salinity of mesocosms and a field location collected while conducting experiments on seagrass in Nahant, Massachusetts

During the experiment, we monitored water temperature and salinity in each mesocosm using an YSI 556 Handheld Multiparameter Instrument with a 556 DO/Temperature/Conductivity Field Cable coinciding with the Zostera monitoring. For each set of measurements, we sampled all control mesocosms before sampling disease mesocosms, rinsing the YSI probe in 10% bleach and DI water between each container to prevent cross-contamination. In addition, we monitored water temperature continuously using a HOBO® water temperature data logger (UA-002-64, Onset) at the CB (Curlew Beach, Nahant, 42° 25.2378' N, 70° 54.9474' W) subpopulation location to confirm temperature in our mesocosms reflected conditions in the field.