Leveraging multiple data sources to assess competition between introduced wild pigs and native deer

Introduced species have diverse impacts on native wildlife and ecosystems. Negative effects of introduced species on native species through competition or amensalism are frequently hypothesized, but challenging to test in the field, particularly for large vertebrates. Wild pigs (Sus scrofa) are a widely distributed introduced species that are hypothesized to compete with native wildlife. We used multiple data sources to evaluate the strength of negative effects of wild pigs on native black-tailed deer (Odocoileus hemionus columbianus) by looking at multiple niche dimensions and fitness consequences for deer. We combined isotopic niche data with camera surveys that provided density, spatial overlap, and temporal overlap of deer and wild pigs. We also used cameras to gather data on deer body condition and reproduction to use as fitness metrics. We evaluated niche overlap between deer and wild pigs and evaluated if deer fitness was related to the density of wild pigs. Our results illustrat..., , # Leveraging multiple data sources to assess competition between introduced wild pigs and native deer

Metadata for the manuscript 'Leveraging multiple data sources to assess competition between introduced wild pigs and native deer' published in Ecosphere by MA Parsons and JK Young.

The data and R code provided here can be used to recreate all results from this manuscript. The data files included several raster layers of topographic and landcover variables, photo data from a camera grid, cougar kill site information, and isotope data for deer and pigs.

The R scripts conduct all analyses including estimating density of deer and pigs, calculating dietary overlap via isotopes, and estimating what landscape variables are related to deer body condition and reproduction.

## DATA FILES

### ProcessedData

The datafiles include:

1. Raster layers of landcover and topographic data
2. Camera station and photo data from a camera grid used to monitor deer and pigs
3. Cougar kill site locations a...,