Elevated human impact on islands increases the introduction and extinction status of native insular reptiles

In the Anthropocene, the ranges of introduced species are expanding, while extinction-prone species are contracting. Introductions and extinctions are caused by how species respond to human impacts, but it is unknown why the ranges of some species expand and some contract. Here, we test whether this opposite response of human impact is due to introduced and extinction-prone species falling at opposite ends of geographic, evolutionary, or ecological trait continua. We constructed a database of native range maps, traits, phylogenetic relationships, and the introduction and extinction-prone status of squamate reptiles with ranges native to the Western Hemisphere. Across >3,000 snake and lizard species (88% of known native squamates), 142 had been introduced elsewhere and 483 were extinction-prone (i.e., vulnerable, endangered, critically endangered, extinct in the wild, extinct). To explain variation in status, we first tested if the same human-impacted regions in the Americas contained..., , , # Elevated human impact on islands increases the introduction and extinction status of native insular reptiles

[https://doi.org/10.5061/dryad.qjq2bvqqc](https://doi.org/10.5061/dryad.qjq2bvqqc)

## Files

1. *JesseEcography2024WestHemiSquamatePhylogeny.nwk* - Newick format phylogeny of Western Hemisphere squamates
2. *JesseEcography2024WestHemiSquamateVariables.csv* - comma delimited file of the derived variables used in the study.

## Metadata

The variables in JesseEcography2024WestHemiSquamateVariables.csv are

1. **Tip_labels**
* **Description**: Unique identifier for each species in the phylogeny.
* **Type**: Categorical (string)
* **Example values**: Abronia_anzuetoi, Abronia_aurita
2. **Genus**
* **Description**: Genus name of the species.
* **Type**: Categorical (string)
* **Example values**: Abronia
3. **Species**
* **Description**: Full species name including genus and specific epithet.
* **Type**: Categorical (string)
* **Example values**: Abronia ...