Marine Conservation Paleobiology by Carrie L. Tyler & Chris L. Schneider

Author:Carrie L. Tyler & Chris L. Schneider
Language: eng
Format: epub
Publisher: Springer International Publishing, Cham

Acknowledgements

We wish to thank Courtney Chin, Chrissy Garcia, and Rhiannon Roopnarine for the food chain illustrations and other graphical assistance. We also thank the CAS Paleoecology Discussion Group, including Allen Weik, for many useful discussions which contributed to this chapter. Finally, thanks to Kenneth Angielczyk and Carol Tang for asking difficult questions.

Appendix 1

Hypergeometric Variance

The hypergeometric distribution describes the probability given a population with a featured subset of observations, and a sample from the population, that a random selection of individuals from the population will include a certain fraction of the sample comprising individuals with the featured characteristic. In this case, the population consists of 728 species (N), of which 433 are featured as fossilized (K). A sample is the richness of a trophospecies (n), of which a subset are observed as fossilized (k). The expected fossilization or hypergeometric mean value is

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