Occurrencedata: CSV file with occurrence data

In MaxentVariableSelection: Selecting the Best Set of Relevant Environmental Variables along with the Optimal Regularization Multiplier for Maxent Niche Modeling

Description

Longitude and latitude values, as well as values of four environmental variables (from the Bio-ORACLE dataset; Tyberghein et al., 2012) for each of 98 occurrence sites (locations where a species was recorded).

Format

A data frame that specifies geographic locations and environmental conditions of 98 occurrence sites.

species

The species name is here set to 'bg', which stands for background

longitude

longitudinal coordinate

latitude

latitudinal coordinate

calcite

Mean calcite concentration (mol/m3)

parmean

Mean photosynthetically active radiation (Einstein/m2/day)

salinity

Mean salinity (PSS)

sstmax

Maximum sea surface temperature (degree celsius)

References

Tyberghein L, Verbruggen H, Pauly K, Troupin C, Mineur F and De Clerck, O (2012)
Bio-ORACLE: a global environmental dataset for marine species distribution modelling
Global Ecology and Biogeography 21:2 272–281.

Examples

occurrencelocations <- system.file("extdata",
                                   "Occurrencedata.csv",
                                   package="MaxentVariableSelection")
occurrencelocations <- read.csv(occurrencelocations,header=TRUE)
head(occurrencelocations)

Example output

         species  longitude latitude  calcite parmean salinity sstmax
1 Fucusdistichus  -20.24000 74.31639 0.002835  32.733   31.574  2.305
2 Fucusdistichus  144.18307 44.04696 0.004014  31.303   32.714 19.643
3 Fucusdistichus -176.56049 51.93829 0.000151  25.391   32.780  8.637
4 Fucusdistichus  -58.83333 55.01667 0.000362  32.034   30.774  9.107
5 Fucusdistichus  -75.89486 78.86478 0.002603  35.241   32.193  1.101
6 Fucusdistichus  -70.61184 42.99216 0.000936  31.433   31.107 18.801

MaxentVariableSelection documentation built on May 1, 2019, 8:20 p.m.