DOI: 10.5061/dryad.4qrfj6qpc
title: Data from: First 87Sr/86Sr Isotope data for the extinct sloth Lestodon armatus: Insights into the spatial ecology of South American Late Pleistocene Megafauna

description: This dataset provides comprehensive data for understanding the spatial
 ecology of the extinct giant ground sloth, Lestodon armatus, during the
 Late Pleistocene in Uruguay, South America. The research context focuses
 on elucidating mobility patterns and landscape use of this species through
 strontium isotope analysis. The dataset includes raw 87Sr/86Sr isotope
 values obtained from L. armatus bone and dentin samples collected from six
 distinct localities in Uruguay, including data from six individuals and
 serial sampling of one tooth from one of the sampled sites. Users can
 utilize these data to replicate the findings of Varela & Fariña
 (2025), which showed highly localized 87Sr/86Sr signatures, suggesting
 limited movement and defined home ranges for this species, and ruled out
 extensive seasonal migrations. Included are all 87Sr/86Sr isotope data and
 the R script (script.R) used for statistical analysis, generation of
 figures, probability-of-origin surfaces, and home range estimations
 presented in the original study. Also, the dataset contains habitat
 suitability and resistivity raster files, as well as a .ini configuration
 file for executing the Omniscape analysis in Julia to explore landscape
 connectivity in southern Uruguay during the Last Glacial Maximum. This
 dataset offers a valuable resource for researchers studying Quaternary
 paleoecology, megafauna mobility, isotope geochemistry, and landscape
 connectivity, providing a baseline for the spatial ecology of South
 American megamammals.
description: # First 87Sr/86Sr Isotope data for the extinct sloth Lestodon armatus:
 Insights into the spatial ecology of South American Late Pleistocene
 megafauna Dataset DOI: [10.5061/dryad.4qrfj6qpc](10.5061/dryad.4qrfj6qpc)
 ## Description of the data and file structure Varela & Fariña (2025)
 Data and code to reproduce the analysis presented in Varela & Fariña
 (2025). First 87Sr/86Sr Isotope Data for the Extinct Sloth Lestodon
 armatus: Insights into the Spatial Ecology of South American Late
 Pleistocene Megafauna. Proceedings B. Doi: 10.1098/rspb.2025-0309
 **87Sr/86Sr Analysis**: DataFossil includes the 87Sr/86Sr Isotope Data
 generated in the present study. UYData includes data for Uruguay from
 Avigliano et al. (2020) UYisoSr includes the Sr isoscape from Bataille et
 al. (2020) cropped to the region of interest of the study Rasters for
 intermediate results are also provided as .tif files. **Connectivity
 Analysis**: Suitability and Resistivity rasters for L. armatus are
 provided as .tif files A .ini file is provided to execute the Omniscape
 analysis in Julia  ### Files and variables #### Raw data and code #####
 File: FossilData.csv **Description:** Raw data generated in the study
 ##### Variables * ID: Sample id * ID2: Sample id2 * Site: Site name *
 Sr: 87Sr/86Sr value * Sd: 87Sr/86Sr Standard deviation * Lat: Latitude *
 Lon: Longitude * Tooth position (cm): Sample position along L. armatus
 tooth * Delta13Ccarb-coll: Delta13Ccarb-coll value for the sample #####
 File: Script.R **Description:** R script with the code to replicate
 analysis #### GIS input files with data used for R analysis ##### File:
 FossilData.shp **Description:** GIS shape file including L. armatus
 87Sr/86Sr for analysis in R ##### File: UYData.shp **Description:** GIS
 shape file with data from Avigliano et al. (2020) ##### File: mask\_UY.shp
 **Description:** GIS shape file, Uruguay mask ##### File: mask\_UY2.shp
 **Description:** GIS shape file, Uruguay mask #### .tif files including
 input files, partial and final results ##### File: UYisoSr.tif
 **Description:** Masked isoscape from Bataille et al. (2020) ##### File:
 UYisoSr\_se.tif **Description:** Masked isoscape from Bataille et al.
 (2020) ##### File: SrCAL.tif **Description:** Calibrated isoscape based on
 data from Avigliano et al. (2020) ##### File: SrCALsd.tif
 **Description:** Calibrated isoscape based on data from Avigliano et al.
 (2020) ##### File: AdV1.tif **Description:** Probability of origin result
 for AdV site sample ##### File: Aigua.tif **Description:** Probability of
 origin result for Aigua site sample ##### File: Barreto.tif
 **Description:** Probability of origin result for Barreto site sample
 ##### File: Caño.tif **Description:** Probability of origin result for
 Caño site sample ##### File: Mercedes.tif **Description:** Probability of
 origin result for Mercedes site sample ##### File: Yi.tif
 **Description:** Probability of origin result for Yi site sample #####
 File: Suit.tif **Description:** Suitability raster for L. armatus, input
 for Omniscape analysis ##### File: Resist.tif **Description:** Resistivity
 raster for L. armatus, input for Omniscape analysis ##### File:
 cum\_currmap.tif **Description:** Omniscape analysis cumulative current
 result #### .ini file to run Omniscape analysis ##### File:
 Lestodon\_armatus.ini **Description:** .ini file to run Omniscape analysis
 in Julia ## Code/software Data can be viewed in Qgis. R packages assignR
 and terra were used within R. Connectivity analysis was run in Omniscape
 package for Julia. The script.R file contains all the code needed to
 replicate the Sr analysis. The Lestodon_armatus.ini file has the code
 needed to replicate the Omniscape analysis. ## Access information Other
 publicly accessible locations of the data: *
 [https://github.com/lvar/Varela-Fari-a-2025](https://github.com/lvar/Varela-Fari-a-2025)