Ecological, taxonomic, and taphonomic components of the post-Paleozoic increase in sample-level species diversity of marine benthos

摘要: Abstract Biological veracity of the sharp diversity increase observed in many analyses post-Paleozoic marine fossil record has been debated vigorously recent years. To assess this question for sample-level (“alpha”) diversity, we used bulk samples shelly invertebrates, representing three major groups (brachiopods, bivalves, and gastropods), to compare Jurassic late Cenozoic benthos. After restricting data set single-bed, whole-fauna, (n ≥ 30 specimens) from comparable open siliciclastic facies, were able retain 427 (255 172 Cenozoic), with most those originating our own empirical work. Regardless metric applied, initial results suggest that standardized species (or genus) driven by evenness and/or richness common taxa, increased between at least a factor 1.6. When are pa...