Intraspecific diversity poorly predicts invasibility and invasiveness: A meta-analysis of experimental invasions

Identifying the biotic factors underlying invasion success is critical to understand the dynamics of biological invasions; and while some studies suggest that intraspecific diversity may play an important role, there has not been a systematic evaluation of the evidence. We performed a meta-analysis on 35 experimental studies and 107 effect sizes to test two hypotheses: (1) higher intraspecific diversity in a resident population decreases the likelihood of it being successfully invaded by other species, and (2) higher intraspecific diversity in an invading population increases its ability to invade another species or community. We found heterogeneous effects among studies and that overall resident genetic diversity has a very small, non-significant negative effect on invasion success, while invader genetic diversity has a small but significant positive effect. The minimal impact of intraspecific diversity is somewhat unexpected, given the well-understood mechanisms analogous to those off..., , , # Data from \"Intraspecific diversity poorly predicts invasibility and invasiveness: a meta-analysis of experimental invasions\"

We performed a meta-analysis of experimental studies that manipulate intraspecific genetic or phenotypic variation of a resident or invader species. The dataset of 107 effect sizes was collected from 35 studies. We recorded invasion success and other study characteristics including: whether the species varying in genetic diversity was the resident or the invader, the context of the experiment depending on whether it was conducted in a controlled lab setting, semi-natural enclosures, or in the wild, and the taxon as either plant, microbe, or invertebrate, the length of the experiment as the estimated number of generations of the genetically variable species, and the number of genotypes used in the variable treatments.

## Description of the data and file structure

The data for this study is the file Invasion_review_table_05_2024.csv and the code to run the anal...