ERSin: Ecological representativeness score in situ

In GapAnalysis: Conservation Indicators using Spatial Information

Description

The ERSin process provides an ecological measurement of the proportion of a species range that can be considered to be conserved in protected areas. The ERSin calculates the proportion of ecoregions encompassed within the range of the taxon located inside protected areas to the ecoregions encompassed within the total area of the distribution model, considering comprehensive conservation to have been accomplished only when every ecoregion potentially inhabited by a species is included within the distribution of the species located within a protected area. This function uses a thresholded species distribution model, an ecoregions file, and a protected areas file

Usage

ERSin(
  Species_list,
  Occurrence_data,
  Raster_list,
  Pro_areas = NULL,
  Ecoregions_shp = NULL,
  Gap_Map = FALSE
)

Arguments

Species_list	A vector of characters with the species names to calculate the GRSex metrics.
Occurrence_data	A data frame object with the species name, geographical coordinates, and type of records (G or H) for a given species
Raster_list	A list of rasters representing the species distribution models for the species list provided in Species_list. The order of rasters in this list must match the same order as Species_list.
Pro_areas	A raster file representing protected areas information. If Pro_areas=NULL the function will use a protected area raster file provided for your use after run GetDatasets()
Ecoregions_shp	A shapefile representing Ecoregions_shp information with a field ECO_NUM representing Ecoregions_shp Ids. If Ecoregions_shp=NULL the funtion will use a ecoregion shapefile file provided for your use after run GetDatasets()
Gap_Map	logical, if TRUE the function will calculate gap maps for each species analyzed and will return a list with two slots ERSin and gap_maps

Value

This function returns a dataframe as main result with two columns:

species	Species name
ERSin	ERSin value calculated

References

Khoury et al. (2019) Ecological Indicators 98:420-429. doi: 10.1016/j.ecolind.2018.11.016

Examples

##Obtaining occurrences from example
data(CucurbitaData)
##Obtaining species names from the data
Cucurbita_splist <- unique(CucurbitaData$species)
##Obtaining Raster_list
data(CucurbitaRasters)
CucurbitaRasters <- raster::unstack(CucurbitaRasters)
##Obtaining protected areas raster
data(ProtectedAreas)
##Obtaining ecoregions shapefile
data(ecoregions)
#Running ERSin
ERSin_df <- ERSin(Species_list = Cucurbita_splist,
                   Occurrence_data = CucurbitaData,
                   Raster_list = CucurbitaRasters,
                   Pro_areas= ProtectedAreas,
                   Ecoregions_shp=ecoregions,
                   Gap_Map=FALSE)

GapAnalysis documentation built on June 14, 2021, 9:07 a.m.