DOI: 10.6084/m9.figshare.24131949.v1
title: Unravelling the complexities of temporal biotic homogenisation and heterogenisation

description: Data and scripts to recreate the analyses within "Unravelling the complexities of temporal biotic homogenisation and heterogenisation".Data is contained within the "Datafiles" folder. This data consists of:Bird_list.csv: List of birds present in the study area during the study periodsCentroids_10.csv: Centroids (latitude and longitude) of the centers of each hectad (10 km x 10 km grid).ClimChaprec_30.csv: Change in precipitation between the two study periodsClimChatavg_30.csv: Change in average temperature between the two study periodsconsensus_jetz_3000: Jetz consensus trees (see Jetz et al. 2012 for more information)data_30km.csv: the full dataset (if only the data is needed without running the script to obtain metrics and combine into one datafile)elev_30km: Elevation data for Britain in 30 km x 30vkm gridsFunc: Functional traits for bird species in the study (see Tobias et al. 2022 for more information)graph_2291_1.5: Spatial graph for use within the modellinggrid_10: Shapefile of the 10 km x 10 km hectadsLandChange.csv: Land cover change between 1990 and 2015 (see Rowland et al. 2020 for more information)pa_1990_10.csv: Presence absence data for each hectad in BA1990 (see Gillings et al. 2019 for more information)pa_2010_10.csv: Presence absence data for each hectad in BA2010 (see Gillings et al. 2019 for more information)Shan1990_30.csv: Shannon's diversity for landcover in each 30 km x 30 km grid in 1990.Shan2015_30.csv: Shannon's diversity for landcover in each 30 km x 30 km grid in 2015.ShanCha_30.csv: Change in Shannon's diversity between the two time periods.Specialisation.csv: Habitat specialisation values and quartiles for British birds (see Sullivan et al. 2016 for more information).status_sp.csv: A database of information for each bird species found within the study area.Data was derived from the following sources:Gillings, S., Balmer, D. E., Caffrey, B. J., Downie, I. S., Gibbons, D. W., Lack, P. C., Reid, J. B., Sharrock, J. T. R., Swann, R. L., & Fuller, R. J. (2019). Breeding and wintering bird distributions in Britain and Ireland from citizen science bird atlases. <i>Global Ecology and Biogeography</i>, <i>28</i>(7), 866–874. https://doi.org/10.1111/geb.12906Hollis, D., McCarthy, M., Kendon, M., Legg, T., & Simpson, I. (2019). HadUK‐Grid—A new UK dataset of gridded climate observations. Geoscience Data Journal, 6(2), 151-159.Jetz, W., Thomas, G. H., Joy, J. B., Hartmann, K., & Mooers, A. O. (2012). The global diversity of birds in space and time. <i>Nature</i>, <i>491</i>(7424), Article 7424. https://doi.org/10.1038/nature11631Rowland, C., Marston, C., Morton, D., & O'Neil, A. (2020). Land Cover Change 1990-2015 (25m raster, GB).Sullivan, M. J. P., Newson, S. E., & Pearce-Higgins, J. W. (2016). Changing densities of generalist species underlie apparent homogenization of UK bird communities. <i>Ibis</i>, <i>158</i>(3), 645–655. https://doi.org/10.1111/ibi.12370Tobias, J. A., Sheard, C., Pigot, A. L., Devenish, A. J. M., Yang, J., Sayol, F., Neate-Clegg, M. H. C., Alioravainen, N., Weeks, T. L., Barber, R. A., Walkden, P. A., MacGregor, H. E. A., Jones, S. E. I., Vincent, C., Phillips, A. G., Marples, N. M., Montaño-Centellas, F. A., Leandro-Silva, V., Claramunt, S., … Schleuning, M. (2022). AVONET: Morphological, ecological and geographical data for all birds. <i>Ecology Letters</i>, <i>25</i>(3), 581–597. https://doi.org/10.1111/ele.13898All scripts and functions are included within the folder for analysing the data to produce the outputs found in the manuscript: <i>Unravelling the complexities of temporal biotic homogenisation and heterogenization: avian assemblage dynamics in Britain.</i> All code is for use within the R coding environment (v4.2.1; R Core Team 2022).<br>The <i>main.script</i> script loads all necessary data and packages from the script <i>source.script</i>. The script then runs through all the necessary steps to reproduce the results in the manuscript.