Aboveground versus soil-mediated effects of an invasive grass on fire-dependent forbs in an oak woodland

Most work on plant competition intensity in general has focused on how aboveground and belowground competition for resources between plants change with soil resource availability. In contrast, much work on the competitive effects of non-native invasive species on native species has focused on other mechanisms (e.g., allelopathy, microbial changes) and has largely ignored how these effects interact with mechanisms of resource competition along productivity gradients.
We examined aboveground effects of an invasive grass, Microstegium vimineum, along with soil differences between invaded and non-invaded areas on two native perennial herbs at a productive and an unproductive oak woodland site in north Mississippi, USA. We transplanted 32 individuals each of Helianthus silphioides and Potentilla simplex from uninvaded areas into natural patches dominated by M. vimineum at each of the sites. Each transplant was randomly assigned to a pot with either native soil or soil from around M. vimineum..., , , # Data from: Aboveground versus soil-mediated effects of an invasive grass on fire-dependent forbs in an oak woodland

(Williams & Brewer, 2024) [https://doi.org/10.1002/ece3.11712](https://doi.org/10.1002/ece3.11712)

[https://doi.org/10.5061/dryad.zkh1893hb](https://doi.org/10.5061/dryad.zkh1893hb)

## Description of the data and file structure

**Appendix S1 metadata.docx** - The metadata containing the variables used in the statistical analyses and a description of what the variable represents.

**Appendix_S1_data.csv -** The data used for all analyses. Specifically, this file contains the initial weight, canopy density above the transplants, survival, and flowering data for *Helianthus silphioides* and *Potentilla simplex* transplants.

**Appendix_S1_code.r** - The annotated R script (created in R version 4.1.0) containing the code for all analyses performed.

## Code/Software

The R script (created in R version 4.1.0) for all analyses performed in the associated manuscript ti...