Abstract
Terrestrial ecologists long ago remarked on the richness of the floras and faunas of tropical environments relative to colder climates. The diversification within many specific taxonomic groups is clearly greater in the tropics than in temperate latitudes, both in terrestrial and in marine environments. Coastal environments support many more species of invertebrates and fish than open ocean regions, probably a response to resource supplies; low numbers of species are common in depauperate, severe, and disturbed habitats. Such observations have spawned an abundant and contentious body of publications that have dealt with three major problems: first, how to quantify the clearly observable differences in diversity of species , second, how are such differences in taxonomic richness of communities generated and maintained, and third, what do such differences mean ecologically.
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Notes
- 1.
The choice of the base of logarithm is arbitrary; if base 2 is used, the units will be in bits; if base e is used, the units are bels.
- 2.
In cases involving sessile, colonial, or vegetatively growing organisms (bryozoans, tunicates, and salt marsh grasses are examples), it is not possible to define individuals. Pielou (1966) provides suggestions with how to deal with such cases.
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© 2015 Springer-Verlag New York
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Valiela, I. (2015). Taxonomic Structure: Species Composition. In: Marine Ecological Processes. Springer, New York, NY. https://doi.org/10.1007/978-0-387-79070-1_12
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DOI: https://doi.org/10.1007/978-0-387-79070-1_12
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