the two faces of secondary contact on islands: introgressive hybridization between endemics and reproductive interference between endemics and introduced species

Aim: Hybridization is thought to have played an important role in shaping the evolutionary history of diverse island taxa. Here, we propose an ecological and evolutionary framework for understanding the causes and consequences of heterospecific mating on islands – with and without introgressive hybridization. We use this framework to support our main contention that cases of secondary contact among endemic species should commonly result in introgressive hybridization whereas cases of contact between endemic and introduced species should commonly result in reproductive interference – resulting in two qualitatively different faces of secondary contact on islands.
Location: Canary Islands, Galapagos, New Zealand, Caribbean, and Hawaii.
Taxa: 705 vertebrate, invertebrate, and plant species spanning 167 genera and 99 families.
Methods: Using a quantitative analysis of empirical research on secondary contact on islands, we weigh evidence for the drivers of secondary contact and heterospecific..., This dataset includes an analysis of empirical research regarding secondary contact on islands gathered from a literature search. The research articles were collected from a search on Scopus, the titles and abstracts of each article were screened, and then the full texts were screened for relevance. We then extracted data surrounding the causes and consequences of heterospecific mating between endemic species and endemic and introduced species. Divergence time estimates were collected for pairs of taxa when available, and each individual taxon was extracted in order to assess the prevalence of hybridization among endemic species. All statistical analyses were performed using the scripts included in the present dataset., , # The two faces of secondary contact on islands: Introgressive hybridization between endemics and reproductive interference between endemics and introduced species

### General Information

This data_availability directory contains all of the scripts and results necessary to recreate the analyses and plots used in the article \"Reatini et al. (2023)The two faces of secondary contact on islands: Introgressive hybridization between endemics and reproductive interference between endemics and introduced species

Below is a description of the results files, the meaning of the column names within those files, and the corresponding analyses and plots for which they were used. A description of the script used to carryout the analyses follows.

### Results Files

Below is a brief description of each of the results files and the figures they were used to produce:

Column name descriptions for all results files can be found in the file \"csv_descriptions.xlsx\"

lit_search_full_dataset.csv - dataset ...