Erythrism Community Science Project Dataset and Code

<p dir="ltr">These data and code correspond to the paper "Community science data support long-standing hypotheses on the evolution of the enigmatic erythristic morph of the Eastern Red-backed Salamander (<i>Plethodon cinereus</i>)". </p><p dir="ltr">Analyses_code_ery includes all the code needed to replicate analyses form the paper.</p><p dir="ltr">The data.zip file includes all the data used in the study: </p><ul><li>ColorVariation_AllData.csv has the scored color morph phenotypes and metadata for ~55,000 <i>P. cinereus </i>iNaturalist records</li><li>amphibian_iNat_meta_2020_2025.csv has the metadata from all amphibian iNaturalist records for 2020-2025 (iNaturalist, 2025).</li><li>inat_newt_meta_2020_2025.csv has the metadata from all research-grade iNaturalist observations for <i>Notophthalmus viridescens </i>(iNaturalist, 2025)<i>.</i></li><li>the wc2.1_30s_bio_11.7.2024 folder has the climate data accessed from WorldClim v2.1 (Fick & Hijmans, 2017).</li><li>IUCN range shapefiles for <i>P. cinereus </i>and <i>N. </i><i>viridescens </i>(IUCN, 2025).</li><li>Last glacial maximum shapefile (Ehlers et al., 2011)</li></ul><p dir="ltr">References</p><ol><li>iNaturalist contributors, iNaturalist (2025). iNaturalist Research-grade Observations. iNaturalist.org.

Occurrence dataset <a href="doi.org/10.15468/ab3s5x" target="_blank">doi.org/10.15468/ab3s5x</a> accessed via GBIF.org on 2026-01-05. </li><li>Fick, S. E., and R. J. Hijmans. 2017. WorldClim 2: new 1-km spatial resolution climate surfaces for global land areas. <i>International Journal of Climatology </i>37: 4302-4315. <a href="doi.org/10.1002/joc.5086" target="_blank">doi.org/10.1002/joc.5086</a>.</li><li>IUCN, Conservation International & NatureServe. 2020. <i>Plethodon cinereus</i> (spatial data).