TetrapodTraits Database

Résumé fourni par la source

Abstract Tetrapods (amphibian, reptiles, birds and mammals) are model systems for global biodiversity science, but continuing data gaps, limited data standardisation, and ongoing flux in taxonomic nomenclature constrain integrative research on this group and potentially cause biassed inference. We combined and harmonised taxonomic, spatial, phylogenetic, and attribute data with phylogeny-based multiple imputation to provide a comprehensive data resource (TetrapodTraits 3.0.1) that includes values, predictions, and sources for body size, activity time, micro- and macrohabitat, ecosystem, threat status, biogeography, insularity, environmental preferences, human influence, diet, longevity, litter/clutch size, developmental mode, biome prevalence, population trend, and major threat types for all 33,281 tetrapod species covered in recent fully sampled phylogenies. While there is an obvious need for further data collection and updates, our phylogeny-informed database of tetrapod traits can support a more comprehensive representation of tetrapod species and their attributes in ecology, evolution, and conservation research. Version 3.0.1 (6 September 2026). This update corrects the calculation of land-use proportions, which are now expressed relative to the total land area available within each 110 × 110 km equal-area grid cell. This correction affects values for coastal cells. In addition, the LUH2-derived projections of land-use change in SpeciesLevel_LUH2_Changes.csv have been updated to include the SSP534 and SSP585 scenarios for the year 2100, replacing the scenarios included in Version 3.0.0 (both scenarios are available through 2300 in the LUH2 database). These projections provide heuristic estimates of species-specific exposure to future land-use change by quantifying changes in natural and anthropogenic land-use coverage within each species' current geographic range. The updated files include: GridCells_HYDE_EffectiveLand (replacing GridCells_HYDE.csv), GridCells_LUH2_EffectiveLand_2100_SSP534_SSP585 (replacing GridCells_LUH2.csv), SpeciesLevel_LUH2_Changes_EffectiveLand_2100_SSP534_SSP585 (replacing SpeciesLevel_LUH2_Changes.csv), TetrapodTraits_3.0.1.csv (replacing TetrapodTraits_3.0.0.csv), and TetrapodTraits_3.0.1.R (replacing TetrapodTraits_3.0.0.R).P585 (replacing SpeciesLevel_LUH2_Changes.csv), TetrapodTraits_3.0.1.csv (replacing TetrapodTraits_3.0.0.csv), and TetrapodTraits_3.0.1.R (replacing TetrapodTraits_3.0.0.R). Version 3.0.0 (5 August 2026). This update includes the recomputation of all within-range proportions of land-use classes, using the HYDE database version 3.5 for the year 2025. To improve the consistency and representation of anthropic land-use classes, we replaced PropRangelands with PropConvRangeLandArea, which more accurately represents human-modified rangelands. To ensure that all HYDE-derived land-use proportions sum to 1, we removed PropGrazing (the sum of PropPasture and PropRangelands) and PropAnthroHyde (the sum of cropland, pasture, converted rangelands, and urban area), and added PropNaturalArea, defined as the complement of the anthropic land-use classes. Other modifications include the updates of natural and life-history information for additional 37 species (see Diff_v3.0.0_v2.0.1.csv for a detailed species-level record of all modifications). This release also includes a new supplementary table, SpeciesLevel_LUH2_Changes.csv, providing species-level estimates of current and projected natural and anthropic land-use coverage derived from the LUH2 database under the SSP245 and SSP585 scenarios for the year 2100. Rather than representing projected species distributions, these variables provide heuristic estimates of species-specific exposure to future land-use change by quantifying changes in natural habitat availability within each species' current geographic range. The table also includes alternative range-size metrics derived from absolute (ABS) and stabilized relative (RELS) changes in natural habitat availability for use in downstream ecological and conservation analyses. Aditional details on these metrics are available in Pyron et al. (2025). In TetrapodTraits, a “variable” refers to any individual field (column), while an “attribute” denotes a species-level measurement often associated with a specific 'trait'. Following this treatment, this version includes 28 species-level attributes represented by 140 variables, linked to their respective sources, across 33,281 tetrapod species. Specific fields identify the data source and imputation status for each attribute in TetrapodTraits, while additional tables report the 10K imputed values for each missing entry and species. Taxonomy – includes 8 attributes that inform scientific names and respective higher-level taxonomic ranks, authority name, and year of species description. Field names: Scientific.Name, Genus, Family, Suborder, Order, Class, Authority, and YearOfDescription. Phylogenetic tree – includes 2 attributes that notify which fully-sampled phylogeny contains the species, along with whether the species placement was imputed or not in the phylogeny. Field names: TreeTaxon, TreeImputed. Body size – includes 7 attributes that inform length, mass, and data sources on species sizes, and details on the imputation of species length or mass. Field names: BodyLength_mm, LengthMeasure, ImputedLength, SourceBodyLength, BodyMass_g, ImputedMass, SourceBodyMass. Activity time – includes 5 attributes that describe period of activity (e.g., diurnal, fossorial) as dummy (binary) variables, data sources, details on the imputation of species activity time, and a nocturnality score. Field names: Diu, Noc, ImputedActTime, SourceActTime, Nocturnality. Microhabitat – includes 8 attributes covering habitat use (e.g., fossorial, terrestrial, aquatic, arboreal, aerial) as dummy (binary) variables, data sources, details on the imputation of microhabitat, and a verticality score. Field names: Fos, Ter, Aqu, Arb, Aer, ImputedHabitat, SourceHabitat, Verticality. Macrohabitat – includes 19 attributes that reflect major habitat types according to the IUCN classification, the sum of major habitats, data source, and details on the imputation of macrohabitat. Field names: MajorHabitat_1 to MajorHabitat_10, MajorHabitat_12 to MajorHabitat_17, MajorHabitatSum, ImputedMajorHabitat, SourceMajorHabitat. MajorHabitat_11, representing the marine deep ocean floor (unoccupied by any species in our database), is not included here. Ecosystem – includes 6 attributes covering species ecosystem (e.g., terrestrial, freshwater, marine) as dummy (binary) variables, the sum of ecosystem types, data sources, and details on the imputation of ecosystem. Field names: EcoTer, EcoFresh, EcoMar, EcosystemSum, ImputedEcosystem, SourceEcosystem. Threat status – includes eight attributes describing species threat status according to the IUCN Red list and related literature. Field names: IUCN_Binomial, AssessedStatus, SourceStatus, AssessedStatus2, SourceStatus2, ThreatStatus, ImputedThreatStatus, and SourceImputedStatus. AssessedStatus stores the original IUCN Red List assessment, AssessedStatus2 updates the status of selected Data Deficient (DD) and unassessed (UA) species using previous authoritative assessments from the IUCN or taxonomic working groups, and ThreatStatus further expands coverage by incorporating published imputed threat statuses where available. The corresponding source fields document the origin of each assessment, while ImputedThreatStatus indicates whether the value in ThreatStatus is imputed. See aditional details in the update message for TetrapodTraits 2.0.1 (9 March 2026). Range size – includes 2 attributes representing the species' extent of occurrence, quantified as either the number of 110 × 110 km equal-area grid cells intersected by the species' range or the total range area (km²) calculated in an equal-area projection. Field names: RangeSize, RangeSizekm2. Data derived from MOL databas

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