Global Naturalized Alien Flora (GloNAF). Open access data to support research on understanding global plant invasions.

This dataset is a snapshot of the Global Naturalized Alien Flora (GloNAF) database, version 2.02. GloNAF is a continuously updated, curated compilation of alien naturalized vascular plant inventories for geographic regions from around the world. The dataset has 16,429 unique taxa reported as naturalized or invasive and covers 1,343 regions (including 427 islands) from 336 data sources. For each region, the status (invasive, naturalized) is provided as listed in the original source. We provide the scientific names included with the original data source, and the matching accepted name or synonym of the taxon as given in the World Checklist of Vascular Plants (WCVP) Version 12. In addition, we provide an ESRI shapefile of polygons for each region. We also provide several variables that can be used to filter the data according to quality and completeness of alien taxon lists, which vary among the combinations of regions and data sources. The 'glonaf_flora2.csv' file lists the IDs ('taxon_wcvp_id') of all naturalized taxa contained in GloNAF and the regions they occur in. The 'glonaf_taxon_wcvp.csv' lists the original taxon names provided in the source data along with the corresponding accepted taxon name from the WCVP (version 12) for all alien taxa in GloNAF, regardless of their naturalization status. To link taxon names with naturalization records, join the 'id' column of the 'glonaf_taxon_wcvp.csv' file to the 'taxon_wcvp_id' column in 'glonaf_flora2.csv' . Additional information regarding the original source of the data ('glonaf_reference.csv'), specific attributes of the taxon lists ('glonaf_list.csv') and the region ('glonaf_region.csv') can also be joined similarly to 'glonaf_flora2.csv '. Please note that the 'glonaf_taxon_wcvp.csv' file is an archive of all original taxa names in GloNAF and their standardization and contains names that may not in the latest data. Thus it should not be used without first joining to 'glonaf_flora2.csv' to determine the number of taxa in GloNAF (see below for how to do this). R code to arrive at the number of distinct taxa in GloNAF:library(tidyverse) # load files downloaded from Zenodo to a local folder:glo_wcvp<-read.csv("glonaf_taxon_wcvp.csv",header=TRUE)glo_flora<-read.csv("glonaf_flora2.csv",header=TRUE) glonaf_taxa<-glo_flora %>% left_join(glo_wcvp,join_by(taxon_wcvp_id==id))%>% distinct(accepted_plant_name_id,.keep_all = TRUE)%>% select(accepted_plant_name_id,taxa_accepted)%>% filter(!is.na(accepted_plant_name_id))nrow(glonaf_taxa)# [1] 16429