Definition: An aquatic biome that comprises systems of open-ocean and unprotected coastal habitats, characterized by exposure to wave action, tidal fluctuation, and ocean currents as well as systems that largely resemble these. Water in the marine biome is generally within the salinity range of seawater: 30 to 38 ppt.
Definition: Deriving energy from light sources. In practice, taxa containing plastids and photosynthetic pigments, but with no evidence for consumption of organic particles or prey, are considered to be photoautotrophic. (Barton, AD, Finkel, ZV, Ward, BA, Johns, DG, Follows, MJ. 2013. On the roles of cell size and trophic strategy in North Atlantic diatom and dinoflagellate communities. Limnol. Oceanogr., 58(1), 2013, 254–266. doi:10.4319/lo.2013.58.1.0254)