Elements of ecology (1954) Elements of ecology elementsofecolog00clar Year: 1954 Existence of Plankton 39 Murray and Hjort, 1911, copyright Macmillan & Co. Fig. Globigerina buUoides, a planktonic protozoan belonging to the order Foraminifera. The largest sphere of the shell is about mm in diameter. TABLE 1 Comparison of Sinking Rates of Three Types of Plankton Organisms WITH Those of Spherical Sand and Silt Particles Length or Diameter Sinking Rate (millimeters) (meters per day) Sand grain 8600. Copepod {Calarms) 576. Silt particle 0,01 14 5 Diatom {NUzschia) ^>0
Elements of ecology (1954) Elements of ecology elementsofecolog00clar Year: 1954 Existence of Plankton 39 Murray and Hjort, 1911, copyright Macmillan & Co. Fig. Globigerina buUoides, a planktonic protozoan belonging to the order Foraminifera. The largest sphere of the shell is about mm in diameter. TABLE 1 Comparison of Sinking Rates of Three Types of Plankton Organisms WITH Those of Spherical Sand and Silt Particles Length or Diameter Sinking Rate (millimeters) (meters per day) Sand grain 8600. Copepod {Calarms) 576. Silt particle 0,01 14 5 Diatom {NUzschia) ^>0 Bacteria 0 13^2 Since the density of the water environment is closely similar to that of organisms living in it, the reader will not be surprised to learn that slight changes in the former often have important consequences in
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