The Shifting Balance of Diversity Among Major Marine Animal Groups

作者: J. Alroy

DOI: 10.1126/SCIENCE.1189910

关键词: Paleobiology DatabaseTaxonomic rankExtinction eventExtinctionEcologyBiologyTaxonSpecies richnessBiodiversityCommunity structure

摘要: The fossil record demonstrates that each major taxonomic group has a consistent net rate of diversification and a limit to its species richness. It has been thought that long-term changes in the dominance of major taxonomic groups can be predicted from these characteristics. However, new analyses show that diversity limits may rise or fall in response to adaptive radiations or extinctions. These changes are idiosyncratic and occur at different times in each taxa. For example, the end-Permian mass extinction permanently reduced the diversity …

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