Rodents show darker and redder coloration in warm and rainy environments

Aim: Gloger’s rule predicts that warmer and wetter areas favor more pigmented animals. Yet, the original formulation lacks differentiation between the two primary pigments: eu- and pheomelanin. We examined geographic variation in eumelanin and pheomelanin to unravel how various ecological factors influence pigment deposition, and to assess support for the complex version of Gloger’s rule.
Location: South America.
Time period: Contemporary.
Major Taxa Studied: Sigmodontine rodents.
Methods: We extracted pelage color data from 231 species and quantified the variation in eu- and pheomelanin deposition at the assemblage level. We performed linear multiple regression to investigate the influence of temperature, precipitation, predator diversity, and UVA-B radiance in eumelanin (lightness) and pheomelanin (redness).
Results: Our findings support the original formulations of Gloger’s rule. Rodents in warmer and rainier regions, which also entails greater exposure to UV radiation and a diverse ...,

This release encompasses both the code and data that underpin the conclusions as outlined in the paper. Elaborated methods can be found within the main body of the corresponding article.

, This provided data and code are essential for reproducing the results detailed in the article. The materials are organized into specific folders, each serving a primary role in the analyses. The README file offers a succinct overview of the data structure within each folder., # Rodents in warm and rainy regions exhibit darker and redder coloration

This release encompasses both the code and data that underpin the conclusions as outlined in the paper. Elaborated methods can be found within the main body of the corresponding article.

## Description of the data and file structure

The materials are organized into distinct folders according to their primary roles within the analyses. A concise outline of the data structure within each folder is presented below (in bold).

### *Color\_assembly\_data* folder

*Lightness_space.csv*: Data on average lightness values in South American grid cells, determined by co-occurring species within each cell. Matrix columns: 'ID' (grid cell identification), 'RGB_mean' (average lightness from RGB species values), 'CIE_l_mean' (CIELAB colorspace lightness), 'HSV_v_mean' (HSV colorspace lightness).

*Redness_space.csv*: Data on average redness values in South American grid cells, determined by co-occurring species within each cel...