Dataset for Exploring the potential of nest archives for establishing long-term trends in local populations of an Arctic-nesting colonial sea duck

There are three types of files: data, figures and scripts Data: File1: Table containing 210Pb dating profiles, CRS ages and 14C dates over the depth of the nests. File2: Results of the clam analysis carried out for DSE3 nest File3: Results of the clam analysis carried out for DSE5 nest File4: Diatom and other siliceous indicators count data for the depths of the nests. File5: Zscores for Pb, Zn, Cd, N15 and Chla used in Figure 8. File6: PCA1 for diatoms and the other indicators used in Figure 8. File7: N15 data obtained in the nests. File8: Historical data (Christian Vibes annotations, Arctic Institute archives ) for rifles and shotguns that were sold or traded in the west coast of Greenland. File 9: Table of the metal(loid)s analyzed in the nests.   Scripts: CLAM_script: Script used for performing the age-depth modeling for each nest in R, using 210Pb and 14C dates with the function ‘clam’ in the R package ‘clam’ v. 2.5.0.  PCA code: Script for performing the principal component analysis (PCA) in R to summarize the main patterns of variation over time, PCA-1diatoms and PCA-1indicators from each nest and plotted against time.  Script bchron     The figures are those included in the manuscript.