Data from: On the accuracy of paleodiversity reconstructions: a case study in Antarctic Neogene radiolarians ...
The deep-sea Cenozoic planktonic microfossil record has the unique characteristics of continuously well-preserved populations of most species, with virtually unlimited sample size, and therefore constitutes, in principle, a major resource for macroevolutionary research. Antarctic Neogene radiolarian...
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| Format: | Dataset |
| Language: | English |
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Dryad
2013
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| Subjects: | |
| Online Access: | https://dx.doi.org/10.5061/dryad.nd2mb https://datadryad.org/stash/dataset/doi:10.5061/dryad.nd2mb |
| Summary: | The deep-sea Cenozoic planktonic microfossil record has the unique characteristics of continuously well-preserved populations of most species, with virtually unlimited sample size, and therefore constitutes, in principle, a major resource for macroevolutionary research. Antarctic Neogene radiolarians in particular, are diverse, abundant and consistently well-preserved and evolved rapidly. This fauna is, in theory, a near-perfect testing ground for paleodiversity reconstructions. In this study we determined the diversity history of these faunas from a new quantitative, taxonomically complete data set from Neogene and Quaternary sections at several Antarctic sites. The pattern retrieved by our whole-fauna data set shows a significant, largely extinctionless ecological change in faunal composition and decrease in the evenness of species' abundances during the late Miocene, followed 3 Myr later, at around 5 Ma, by a significant drop in diversity. We tentatively associate this ecological event with a synchronous, ... : Supplementary Table 1Summary of collected samples. N is the number of specimens collected, S the number of species found, a and b the number of singletons and doubletons (respectively) amongst those species, ACE is Chao and Lee (1992)'s Abundance-based Coverage Estimator and u is Good (1953)'s coverage estimator. Depth are given in mbsf (meters below sea-floor) and age estimates are taken from the Neptune Database embedded age model (Lazarus et al. 1995), which is scaled on Berggren et al. 1995.Supplementary Table 2Antarctic Neogene radiolarian data retrieved from the Neptune dataset on the 11th of January, 2011.Supplementary Figure 3Whole-fauna dataset diversity vs untrimmed Neptune dataset subsampled diversity. A and B: Respectively, in-sample species richness and range-through diversity in our whole-fauna dataset. C: Diversity computed from the untrimmed Neptune dataset with five different type of subsampling: UW (black line), OW (dashed black line), CR (light grey line), O2W (dashed light grey line) and ... |
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