Dataset: Sediment organic carbon for subtidal seagrass (Zostera capensis) in the Olifants Estuary, South Africa

This dataset contains sediment organic carbon (%SOC) for subtidal seagrasses (Zostera capensis) in the Olifants River Estuary on the west coast of South Africa. A total number of 36 sediment cores were collected during May 2023, along triplicate transects (~50m apart) across three sampling sites. PVC pipes were used to collect cores up to a mean depth of 27 cm. Included in this dataset is the %SOC for 12 cores collected in May 2024 from one of the sampling sites from the previous sampling effort. All samples were acidifies with 1N hydrochloric acid and rinsed to remove inorganic carbon. Organic carbon content was quantified using an Elemental Vario EL Cub CHNS Analyzer.