Identifying knowledge gaps about context dependency in freshwater species invasions

The abiotic template of freshwater ecosystems is being altered by human activity on a global scale, often promoting the establishment of new invasive taxa and increasing the likelihood of facilitation between invaders. These positive interactions represent a substantive threat to freshwater ecosystems by promoting the establishment and persistence of invasive taxa. To assess the threat posed by freshwater invasive species under global change, we leveraged the existing literature at the intersection of freshwater invasive species and positive biotic interactions using systematic review and meta-analysis. Our findings revealed critical knowledge gaps in the study of interactions between invasive taxa, which may lead to an underestimation of their threat. These gaps included a lack of studies that address indirect interactions, particularly over long temporal scales. Such interactions were understudied for invasive taxa but were often strongly positive. Additionally, almost a third of the ..., We based our analysis on a systematic search of the available literature on positive species interactions in freshwater ecosystems. The core of our corpus was formed by publications that had previously been identified by Albertson et al. (2021). These publications were augmented by an updated search conducted in ISI Web of Science on April 1, 2022, using the following search terms:
(“aquatic” OR “stream$” OR “river$” OR “freshwater$” OR “wetland$” OR “lake$” OR “pond$” OR “vernal”) AND ((“positive interact*” OR “mutualis*” OR “commensal*” OR “facilitation” OR “symbios*” OR “habitat ameliorat*” OR “stress ameliorat*” OR “ecosystem engineer*” OR “stress gradient*”) OR ((“positive interact*” OR “mutualis*” OR “commensal*” OR “facilitation” OR “symbios*” OR “habitat ameliorat*” OR “stress ameliorat*” OR “ecosystem engineer*” OR “stress gradient*”) AND (“invas*” OR “non-native” OR “invad*” OR “non-indigenous”))) NOT “blood\"
The objectives of the updated search were to expand the previous cor..., , # Identifying knowledge gaps about context dependency in freshwater species invasions

[https://doi.org/10.5061/dryad.2z34tmpwh](https://doi.org/10.5061/dryad.2z34tmpwh)

## Description of the data and file structure

The data associated with this project were collected in order to better understand factors which contextualize the outcome of interactions between freshwater species. This includes interactions between both invasive and non-invasive taxa. The intent of this project was to leverage the growing literature on positive biotic interactions in freshwater to highlight knowledge gaps in the study of freshwater invasions.

The file structure consists of three .CSV files, one .RMD file, and one .HTML file. The raw data for the analysis are contained in the .CSV files. The .RMD file contains the code needed to reproduce the analysis. The .HTML file is a knitted rendering of the analysis produced by the .RMD file.

### Files and variables

#### File: Master_Data.csv

**Description:**...,