Paleobiology

Using count data with subsample() function of the divDyn package.

Although the subsample() function was developed for estimating turnover rates and diversity changes over multiple time intervals, it was adapted to execute subsampling on single samples. Let’s say that we have a sample of 20 species, where species have the following number of specimens: # counts of specimens counts <- c(35,19,13,9,6,4,2,2,2,2,2,2,2,1,1,1,1,1,1,1) Preparing data The current version of divDyn can only accept extended formats for ecological samples. This means that every specimen (identity) has to be present as a separate object.

Using data from the PaleoMAP project with chronosphere 0.1.3

Using data from the PaleoMAP project with chrnosphere 0.1.3

chronosphere

Distribution of earth system history variables

divDyn

Diversity Dynamics using Fossil Sampling Data

The r package divDyn for quantifying diversity dynamics using fossil sampling data

With the help of the core function and standard subsampling options, we revisit the hypothesis of declining taxonomic rates over time, mass extinctions and equilibrial diversity dynamics and assess their methodological dependency.