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SDMapCH (v1.3): a Comprehensive database of modelled species habitat suitability maps for Switzerland

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Aug 19, 2025 version files 487.81 GB

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Abstract

Conserving natural ecosystems requires consistent and standardized biodiversity data to advance scientific research and improve ecological understanding. While species occurrence records are commonly used in biodiversity assessments, they provide only a snapshot of distributions at sampled sites and fail to capture potential habitat suitability or future shifts, both of which species distribution models can effectively generalize and predict. Despite several national initiatives to develop databases of modelled species habitat suitability maps, even well-studied countries often lack comprehensive, standardized datasets that cover a wide range of taxonomic groups modelled using a consistent framework. Using Switzerland as a case study, we demonstrate how these gaps can be addressed and introduce SDMapCH (v1.3), a nationwide raster database of modelled species habitat suitability maps at a 25-meter resolution. SDMapCH provides individual maps for about 7,500 species, as well as aggregated maps for 11 major taxonomic groups, 26 ecological guilds, and 5 conservation status categories, under both present conditions and future climate change scenarios projected through the end of the century. SDMapCH was developed using the N-SDM modelling pipeline, an end-to-end platform built on a spatially nested hierarchical framework and optimized for high-performance computing environments. N-SDM enables multi-level and multi-resolution integration of species and covariate data, addressing niche truncation issues and supporting parallel high-resolution modelling of numerous species within tight timeframes. SDMapCH maps were evaluated using a state-of-the-art cross-validation procedure, and all layers were systematically validated through a data integrity check. By providing standardized, high-resolution habitat suitability maps for diverse species across various taxonomic and functional groups, SDMapCH stands as a key resource for advancing scientific research and enhancing biodiversity assessments in Switzerland and beyond.