Data and code for: Carnivore exclosures to protect sheep affect the distribution of a wild cervid
Data files
Aug 01, 2024 version files 91.89 KB
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Code_Forti_Dryad.R
15.12 KB
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Data_Forti_Dryad.csv
75.42 KB
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README.md
1.35 KB
Abstract
In southeast Norway, two carnivore exclosures were set up to protect sheep from large carnivores. The fences consisted of wire strands that were powered during the summer grazing months. While one of the fences (study area Trysil) was put to the ground from fall to spring, the other (study area Grue) was still mounted, but now powered during non-grazing season. We tested whether moose (Alces alces) distribution and density was affected by the exclosures, by counting fecal pellet groups inside and outside of the exclosures (treatment) during spring and fall 2022. The dataset contains the number of fecal pellet groups of different cervid species and domestic sheep inside and outside of the exclosures during two seasons in both study areas, and some habitat covariates.
File List
Data_Forti_Dryad.csv
Code_Forti_Dryad.R
File Descriptions
Data_Forti_Dryad.csv
Variables:
Square_id: Unique identifier of the sample squares
StudyArea: The name of the Norwegian municipality where the carnivore exclosure was situated (Trysil, Grue)
Season: The season of fecal pellet group accumulation (Winter, Summer)
Treatment: The placement of the square in relation to the carnivore exclosure (Inside, Outside)
N_Moose: Count of fecal pellet groups of moose
N_Sheep: Count of fecal pellet groups of sheep
N_Red: Count of fecal pellet groups of red deer
N_Roe: Count of fecal pellet groups of roe deer
Days: Length of season (in days)
bog: Number of sample plots dominated by bog (integer, 0 to 5)
young_forest: Number of sample plots dominated by young forest stands (integer, 0 to 5)
mean_northness: Northness averaged across sample plots (continuous, -1 to +1)
mean_eastness: Eastness averaged across sample plots (continuous, -1 to +1)
mean_slope: Slope averaged across sample plots (continuous, degrees)
elevdev: Elevation (m a.s.l.) relative to average elevation of the study area, averaged across sample plots (continuous, meters)
Code_Forti_Dryad.R
Code applied to analyse the data for the manuscript.
Fecal pellet groups were counted on sample squares consisting of five sample plots each. Sample plots were 10 m2 for roe deer (Capreolus capreolus) and 100 m2 for moose, red deer (Cervus elaphus) and sheep. For each sample square, the main predictor variables describe the season (winter 2021/22 or summer 2022), study area (Trysil or Grue), and the treatment (inside or outside of the carnivore exclosure). In addition, there are several covariates describing the habitat of the square. A more detailed description of the study areas, sampling methods and variables is available in the publication (https://doi.org/10.1002/wlb3.01301).
