Thomas Robert Soderstrom in July 1986. A collaborator of his was Cleofé E. Calderón (1929–2007), the Argentinian-born agrostologist. He is commemorated in "Soderstromia", "Ilex soderstromii", "Anthurium soderstromii", "Lessingianthus soderstromii", "Vriesea soderstromii", "Ouratea soderstromii", "Cryptochloa soderstromii", "Ocellochloa soderstromii", "Poa soderstromii", "Raddia soderstromii". Thomas Robert Soderstrom Thomas Robert Soderstrom (9 January 1936 Chicago – 1 September 1987) was an American agrostologist His special field of study was the grass family Gramineae or Poaceae. He was Curator of Grasses at the National Museum of Natural History in Washington, DC for some twenty years. In 1957 Soderstrom graduated from the University of Illinois with a BSc in
Organisms involved in water purification Organisms involved in water purification Most organisms involved in water purification originate from the waste, wastewater or water stream itself or arrive as resting spore of some form from the atmosphere. In a very few cases, mostly associated with constructed wetlands, specific organisms are planted to maximise the efficiency of the process. Biota are an essential component of most sewage treatment processes and many water purification systems. Most of the organisms involved are derived from the waste, wastewater or water stream itself or from the atmosphere or soil water. However some processes, especially those involved in removing very low concentrations