Carbon and nitrogen stable isotopes of marine inorganic and organic matter around O'ahu, Hawai'i, December 2017

A complete description of the collection and experimental methods is available in Price et al. (in review). In brief, sampling of inorganic and organic matter occurred between 6 and 16 December 2017 from six sites (Electric Beach, Hale‘iwa, Hawai‘i Institute of Marine Biology [HIMB], Magic Island, Sampan Channel, and Waimānalo) surrounding the island of O‘ahu, Hawai‘i, USA. Up to 8 L of seawater was collected in pre-acidified 2 L brown Nalgene bottles during the day (12:00 – 14:00) and night (18:00 – 20:00) and placed on ice in a cooler. Seawater samples were used to assess dissolved inorganic carbon, dissolved organic matter, and particulate organic matter and the specific methods used for each are described below. Zooplankton samples were also collected, but only during the nighttime sampling at four of the six sites (HIMB, Magic Island, Sampan, Waimānalo).