Column_name Description data_type site_code Name of site coded as site name and two letter country string block Experimental block integer plot Plot number on each block integer trt Nutrient addition treatment (Control and N,P,K or combinations) string year_trt Year of experimental nutrient treatment addition integer cover_year Year when abundance and richness data were recorded numeric longitude Geographical Longitude numeric latitude Geographical latitude numeric local_provenance Species provenance on a site either INT (non-native) or native (NAT) integer change_abundace Rates of change in abundance derived at the plot level (either non-native INT or native NAT) numeric change_richness Rates of change in richnes derived at the plot level (either non-native INT or native NAT) numeric