Biodiversity in Wisconsin and Illinois Reefs
![A comparison of biodiversity (numbers of species) per number of specimens collected for four different Silurian paleoenvironments. A comparison of biodiversity (numbers of species) per number of specimens collected for four different Silurian paleoenvironments.](https://fm-digital-assets.fieldmuseum.org/804/588/MM906_dataBiodiv2ed.png)
Biodiversity is commonly compared between different environments. This diagram shows four rarefaction curves from four different Silurian environments. The Silurian reef environments contain more species than Silurian non-reef environments, something also seen in the modern world.