DOI: 10.5061/dryad.5mh2450
title: Data from: Abiotic conditions mediate intraguild interactions between mammalian carnivores

description: 1. Intraguild (IG) interactions are common among mammalian carnivores, can
 include intraguild predation (IGP) and interspecific killing (IK), and are
 often asymmetrical, where a larger more dominant species (IGpredator)
 kills a smaller one (IGprey). According to ecological theory, the
 potential for a IGpredator and IGprey to coexist depends on whether the
 direct consumptive benefits for the IGpredator are substantial (IGP) or
 insignificant (IK), the extent to which the IGprey is the superior
 exploitative competitor on shared prey resources, and overall ecosystem
 productivity. 2. We used resource selection models and spatially-explicit
 age and harvest data for two closely related mesopredators that engage in
 IG interactions, American martens (Martes americana; IGprey) and fishers
 (Pekania pennanti; IGpredator), to identify drivers of distributions,
 delineate areas of sympatry and allopatry, and explore the role of an apex
 predator (coyote; Canis latrans) on these interactions. 3. Model selection
 revealed that fisher use of this landscape was strongly influenced by late
 winter abiotic conditions, but other bottom-up (forest composition) and
 top-down (coyote abundance) factors also influenced their distribution.
 Overall, fisher probability of use was higher where late winter
 temperatures were warmer, snowpack was deeper, and measures of
 productivity were greater. Martens were constrained to areas of the
 landscape where the probability of fisher use, coyote abundance, and
 productivity were low and selected for forest conditions that presumably
 maximized prey availability. Marten age data indicated an increased
 proportion of juveniles outside of the predicted area of sympatry,
 suggesting that few animals survived &gt;1.5 years in this area that
 supported higher densities of fishers. 4. Consistent with asymmetrical IG
 interaction theory, the IGpredator (fishers and, to a lesser degree,
 coyotes) competitively excluded the IGprey (martens) from highly
 productive, milder temperature habitats, whereas IGpredators and IGprey
 coexisted in low productivity environments, where a combination of abiotic
 and biotic conditions enabled the IGprey to be the superior exploitative
 competitor.
description: Marten_RSPF Occurrence
 & Covariate DataAmerican marten used and
 unused location data and covariate data used in resource selection
 probability functions. Block id field designates the random intercept
 term.Fisher_RSPF Occurrence
 & Covariate DataFisher used and unused
 location data and covariate data used in resource selection probability
 functions. Block id field designates the random intercept
 term.Marten_Age-at-Harvest
 Data_2003_2015Age class data
 (juvenile/adult) for harvested American martens. The adult marten data
 were used for calibrating resource selection probability
 functions.Marten &
 Fisher_Noninvasive Survey DataDetection/non-detection
 data for American martens and fishers collected using noninvasive survey
 methods (camera traps). Data were used for resource selection probability
 function model evaluation.Marten Evaluation Data
 PCC_Harvest 1978_2001American marten harvest
 (used) location data. These data were used for resource selection
 probability function model evaluation; percent correctly classified (PCC)
 only.Marten & Fisher
 Harvest Density_Ratio DataHarvest totals and
 harvest density (total animals trapped [2005-2013]/100 km2) for American
 martens and fishers, and fisher:marten ratio. Data collected at the scale
 of New York towns. Data must be joined to town boundary shapefile (also
 included) using BIOCOTOWN field to display data in GIS.New York State Town
 Boundary ShapefileNew York State town
 boundary shapefile for use with the American marten and fisher harvest
 total, harvest density, and harvest ratio data. These two data sources can
 be joined using the BIOCOTOWN field.Towns.zipPost_Hoc_Analysis_ShapefilesWeather station data (30-yr mean climate normal) and American marten southern range boundary used for a post-hoc analysis.Post_Hoc_Analysis_Data.zip