Environmental drivers of bat distribution in Madagascar

This dataset contains 1) an excel file containing occurrence points (updated as of January 2025) for all bat species in Madagascar extracted from published papers and online data repositories (iNaturalist, GBIF), and 2) raster data for the 19 BioClim variables at the current time (averaged for seven climate models), and for the year 2080 at a "business-as-usual" climate trajectory. Occurrence data is ordered by taxonomic family, and is presented at the same resolution as the original data source (i.e., all occurrence points are available at the exact same resolution in the original publications/repositories from which they were obtained). Raster data is clipped to cover the geographic area of Madagascar only.  # Environmental drivers of bat distribution in Madagascar Dataset DOI: [10.5061/dryad.98sf7m0xg](doi.org) ## Description of the data and file structure All occurrence point data was obtained from either the published literature, or online data repositories (GBIF, iNaturalist). X and Y coordinates were saved in the same resolution as the original data source. Climate data was downloaded from WorldClim. ### Files and variables #### File: Occurence_Point_Database.csv **Description:** A database of occurrence points for bat species present in Madagascar. ##### Variables * Taxonomic family = details on the taxonomic family of the corresponding species. * Scientific name = details of the scientific name of the corresponding species. * Common name = details of the common name of the corresponding species. * Description = the year that the species was originally described. * IUCN = the species current IUCN Red List classification status. * Endemic = information on whether the species is endemic to Madagascar or not. * Latitude = the Y coordinate of the occurrence point (at the same resolution as the original data source). * Longitude = the X coordinate of the occurrence point (at the same resolution as the original data source). * Ref = the reference data source. #### File: Current_copy.tif **Description:** A raster layer containing data for 19 bioclimatic variables for Madagascar for the current time period. Resolution = 1km x 1km. Each individual bioclimatic variable is saved as a separate band in the raster layer (19 bands total). The variables are as follows: BIO1 = Annual Mean Temperature (degrees) BIO2 = Mean Diurnal Range (Mean of monthly (max temp - min temp)) (degrees) BIO3 = Isothermality (BIO2/BIO7) (×100) BIO4 = Temperature Seasonality (standard deviation ×100) BIO5 = Max Temperature of Warmest Month (degrees) BIO6 = Min Temperature of Coldest Month (degrees) BIO7 = Temperature Annual Range (BIO5-BIO6) (degrees) BIO8 = Mean Temperature of Wettest Quarter (degrees) BIO9 = Mean Temperature of Driest Quarter (degrees) BIO10 = Mean Temperature of Warmest Quarter (degrees) BIO11 = Mean Temperature of Coldest Quarter (degrees) BIO12 = Annual Precipitation (mm) BIO13 = Precipitation of Wettest Month (mm) BIO14 = Precipitation of Driest Month (mm) BIO15 = Precipitation Seasonality (Coefficient of Variation) BIO16 = Precipitation of Wettest Quarter (mm) BIO17 = Precipitation of Driest Quarter (mm) BIO18 = Precipitation of Warmest Quarter (mm) BIO19 = Precipitation of Coldest Quarter (mm) #### File: 2080_BAU.zip **Description:** A zip folder containing seven raster layers (from seven different future climate models) with data for 19 biolcimatic variables for Madagascar for the year 2080 using a "business-as-usual" RCP 8.5 trajectory. Resolution = 1km x 1km. Each individual bioclimatic variable is saved as a separate band in the raster layer (19 bands total for each of the seven raster layers). Each raster layer contains 70 bands in total, with bands 37-55 corresponding to the bioclimatic variables 1-19. Bands 1-12 are monthly minimum temperatures, bands 13-24 are monthly maximum temperatures, bands 25-36 are mean monthly precipitation, bands 56-67 are monthly potential evapotranspiration, band 68 represents annual potential evapotranspiration, band 69 represents annual climate water deficit, and band 70 represents number of dry months. The 19 bioclimatic variables are the same as described for the Current_copy.tif. The naming convention for the seven raster layers is "modelname_RCPpathway_year.tif". All temperature values are in degrees Celsius, while all precipitation values are in millimeters. ## Code/software Microsoft excel GIS (Arc or Q) ## Access information Other publicly accessible locations of the data: * GBIF * iNaturalist * Worldclim/Madaclim Data was derived from the following sources: * GBIF * iNaturalist * Worldclim/Madaclim