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)
Definition: Sediment is an environmental substance comprised of any particulate matter that can be transported by fluid flow and which eventually is deposited as a layer of solid particles on the bedor bottom of a body of water or other liquid.