Data and code for analysis of spatiotemporal variation in traits and environmental variables in European hole-nesting passerines

Files: trait_data.csv – a comma-delimited file with population-specific annual fitness-related trait data. Traits included: laying date (LD, laying date of the first egg, where 1 = April 1st), clutch size (CS, number of eggs) and fledgling number (FN, number of nestlings 13-16 days after hatching). Annual values for these traits were based on data from individual broods that were not subjected to experimental manipulations (e.g. clutch size manipulation or cross-fostering). Fledgling numbers were based on broods with at least one fledgling. location_data.csv – a comma-delimited file with latitude and longitude (in decimal degrees) for all 44 locations. climate_data.csv – a comma-delimited file with location-specific annual climate data. Climate variables included: North Atlantic Oscillation (NAO) index, mean temperature (in degrees Celsius) and mean precipitation (in mm). For each climate variable, we give the average over daily values in February-May. data_information.csv – a comma-delimited file with a supplementary table on data owners and geographical information per location, study length per population, and sample sizes per trait, species, and location. analysis.R - an R file with code to run analyses of temporal variation in trait values, effects of climate variables on trait values, and spatial synchrony in trait values. Climate data sources: Daily NAO-indices were extracted from the Climate Prediction Center of the National Weather Service (https://www.cpc.ncep.noaa.gov). Daily mean temperature and mean precipitation were extracted from the E-OBS gridded dataset version 20.0e (Cornes et al. 2018, DOI: 10.1029/2017JD028200). Daily mean precipitation for Vlieland (Loc: VLI) was extracted from a Royal Dutch Meteorological Institute (KNMI) weather station (Oost-Vlieland; https://www.knmi.nl/nederland-nu/klimatologie/monv/reeksen). See README.docx for more detail.