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Diversity of Planktonic Foraminifera in Deep-Sea Sediments
Wolfgang H. Berger and Frances L. Parker
New Series, Vol. 168, No. 3937 (Jun. 12, 1970), pp. 1345-1347
Published by: American Association for the Advancement of Science
Stable URL: http://www.jstor.org/stable/1730033
Page Count: 3
You can always find the topics here!Topics: Species, Sediments, Species diversity, Dissolution, Tropical regions, Ocean floor, Surface water, Paleoecology, Diversity indices, Fossils
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The diversity of a planktonic foraminiferal assemblage on the ocean floor depends on the state of preservation of that assemblage. As dissolution progresses, species diversity (number of species in the assemblage) decreases, but compound diversity (based on relative species abundance) first increases and then decreases; species dominance first decreases and then increases. The reason for these changes is that the species most susceptible to solution deliver more sediment to the ocean floor than do species with solution-resistant shells, possibly because the more soluble tests are produced in surface waters, where growth and production are greatest.
Science © 1970 American Association for the Advancement of Science