This repository contains data supporting the results of Bogdziewicz M., Journé V., Hacket-Pain A., Szymkowiak J. 2023. *Mechanisms driving interspecific variation in regional synchrony of trees reproduction*. Ecology Letters Datasets: 1. **seed-production.xlsx** - data on seed production of *Fagus sylvatica*, *Quercus* spp. and *Picea abies* extracted from MASTREE+ database. 2. **weather-beech-fixed.xlsx** - weather data for *Fagus sylvatica* data series, with weather cue calculated using fixed time window (June-July mean max temperature) 3. **weather-beech-temporally-corrected.xlsx** - weather data for *Fagus sylvatica* data series, with weather cue calculated using series-specific optimal time window (as revealed by moving windows analysis) 4. **weather-beech-daily.xlsx** - daily weather data for *Fagus sylvatica* data series 5. **weather-oaks-fixed.xlsx** - weather data for *Quercus* spp. data series, with weather cue calculated using fixed time window (mean April temperature) 6. **weather-oaks-temporally-corrected.xlsx** - weather data for *Quercus* spp. data series, with weather cue calculated using series-specific optimal time window (as revealed by moving windows analysis) 7. **weather-oaks-daily.xlsx** - daily weather data for *Quercus* spp. data series 8. **weather-spruce-fixed.xlsx** - weather data for *Picea abies* data series, with weather cue calculated using fixed time window (mean July temperature) 9. **weather-spruce-temporally-corrected.xlsx** - weather data for *Picea abies* data series, with weather cue calculated using series-specific optimal time window (as revealed by moving windows analysis) 10. **weather-spruce-daily.xlsx** - daily weather data for *Picea abies* data series 11. **weather-petraea-temporally-corrected.xlsx** - weather data for *Quercus petraea* data series, with weather cue calculated using fixed time window (mean April temperature) 12. **weather-robur-temporally-corrected.xlsx** - weather data for *Quercus robur* data series, with weather cue calculated using fixed time window (mean April temperature) R code: 1. **Spatial correlograms and MRQAP - full-data.R** - R code used to: - characterize the scale of regional synchrony in masting and weather cues with Mantel correlograms (based on full dataset) - test the role of weather variation in driving the spatial synchrony of masting (MRQAP analysis) (based on full dataset) - calculate mean regionalmasting synchrony (based on full dataset) 2. **Spatial correlograms and MRQAP - fixed vs temporally-adjusted time windows.R** - R code used to: - characterize the scale of regional synchrony in masting and weather cues with Mantel correlograms (using time series with 10 years of overlapping, continuous data records) - test the role of weather variation in driving the spatial synchrony of masting (MRQAP analysis) (using time series with 10 years of overlapping, continuous data records) 3. **Moving time windows analysis.R** - R code used to: - explore the spatiotemporal stability of the weather-seed production relationships using a moving-window approach - test whether series-specific start of optimal time window depends on series-level long-term mean temperature and precipitation 4. **corNyrs.R** - function calculating pairwise Spearman correlation coefficients for data series with user-specified minimal number years of overlap 5. **FiguresSynchronyMT.R** - functions used to draw Figure 2, Figure 3, Figure 5, and Figure S1 6. **Quercus robur and Quercus petraea - supplementary analysis.R** - supplementary analysis.R - MRQAP with fixed and temporally-corrected windows for weather cues, fitted separately for Quercus robur and Quercus petraea