DOI: 10.5061/dryad.rv15dv493
title: Bioclimatic data for native- and introduced-range localities of Polygonum cespitosum

description: To characterize P. cespitosum's climatic distribution, principal
 component analyses of temperature- and precipitation-related variables
 were conducted using bioclimatic data extracted (from WorldClim) for
 species occurrence data.
description: <em>Persicaria longiseta</em> (=<em>Polygonum
 cespitosum</em> s.l.) locality data include sample populations and
 species occurrences retrieved from GBIF.org. GBIF occurrence data were
 restricted to specimen-based records (i.e., herbarium specimens)
 containing latitude/longitude coordinates and/or specimen images. The
 original GBIF occurrence data are accessible here: GBIF.org (11th
 September 2018) GBIF Occurrence Download
 https://doi.org/10.15468/dl.cguuid Occurrence records
 lacking location coordinates were manually georeferenced according to
 locality descriptions provided that the radius of uncertainty was
 &lt;15 km. The data were subset horizontally (to contain only records
 with coordinates) and vertically (to include only four columns: gbif id,
 country code, latitude, and longitude). These data were concatenated with
 sample population location information. Bioclimatic data were extracted
 from WorldClim (Fick & Hijmans 2017) for locality coordinates at
 2.5 spatial resolution using the raster package in R v.3.6.1.
 Fick, S.E. and R.J. Hijmans, 2017. Worldclim 2: New 1-km spatial
 resolution climate surfaces for global land areas. International Journal
 of Climatology.
description: MISSING VALUES Missing
 values are denoted with periods ("."). For these coordinates,
 bioclimatic data was not returned from the raster package function:
 getData. COLUMN
 DEFINITIONS <em>Identifying
 information…</em> gbif.id = a unique id supplied by
 GBIF that can be cross-referenced with the original occurrence
 data collection.site = whether the row
 corresponds to a collection site, a.k.a. sample population (“yes”) or a
 GBIF occurrence record (“no”) site.id = the abbreviated name of
 the collection site/sample population (e.g. WAD) country.code = the country of the
 locality; country codes are defined by GBIF manually.georeferenced = whether
 the location coordinates were manually georeferenced (“yes) or not
 (“no”) <em>Location
 coordinates…</em> longitude = longitudinal coordinate
 (decimal degrees) latitude = latitudinal coordinate
 (decimal degrees) <em>Worldclim bioclimatic
 variables…</em> bio1 = Annual Mean
 Temperature bio2 =
 Mean Diurnal Range (Mean of monthly (max temp - min temp)) bio3 = Isothermality (bio2/bio7)
 (×100) bio4 =
 Temperature Seasonality (standard deviation ×100) bio5 = Max Temperature of Warmest
 Month bio6 = Min
 Temperature of Coldest Month bio7 = Temperature Annual Range
 (bio5-bio6) bio8 =
 Mean Temperature of Wettest Quarter bio9 = Mean Temperature of Driest
 Quarter bio10 =
 Mean Temperature of Warmest Quarter bio11 = Mean Temperature of Coldest
 Quarter bio12 =
 Annual Precipitation bio13 = Precipitation of Wettest
 Month bio14 =
 Precipitation of Driest Month bio15 = Precipitation Seasonality
 (Coefficient of Variation) bio16 = Precipitation of Wettest
 Quarter bio17 =
 Precipitation of Driest Quarter bio18 = Precipitation of Warmest
 Quarter bio19 =
 Precipitation of Coldest Quarter For more information on bioclimatic
 variables, see:<br>Fick, S.E. and R.J. Hijmans, 2017. Worldclim 2:
 New 1-km spatial resolution climate surfaces for global land areas.
 International Journal of Climatology.