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#' @title Final conservation score ex situ
#' @name FCSex
#' @description This function calculates the average of the three ex situ conservation metrics
#' returning a final conservation score summary table. It also assigns conservation priority categories
#' @param Occurrence_data A data frame object with the species name, geographical coordinates,
#' and type of records (G or H) for a given species
#' @param Species_list A vector of characters with the species names to calculate the GRSex metrics.
#' @param Raster_list A list of rasters representing the species distribution models for the species list provided
#' in \var{Species_list}. The order of rasters in this list must match the same order as \var{Species_list}.
#' @param Buffer_distance Geographical distance used to create circular buffers around germplasm.
#' Default: 50000 (50 km) around germplasm accessions (CA50)
#' @param Ecoregions_shp A shapefile representing Ecoregions information with a field ECO_ID_U representing Ecoregions Ids.
#' If Ecoregions=NULL the function will use a shapefile provided for use after running GetDatasets()
#' @param Gap_Map logical, if \code{TRUE} the function will calculate gap maps for each species analyzed and will return a list
#' with three slots: FCSex, GRSex_maps,and ERSex_maps
#' @return This function returns a data frame summarizing the ex-situ gap analysis scores:
#'
#' \tabular{lcc}{
#' species \tab Species name \cr
#' SRSex \tab Sampling representativeness score ex situ \cr
#' GRSex \tab Geographical representativeness score ex situ \cr
#' ERSex \tab Ecological representativeness score ex situ \cr
#' FCSex \tab Final conservation score ex situ \cr
#' }
#'
#' @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 ecoregions shapefile
#' data(ecoregions)
#' #Running all three Ex-situ gap analysis steps using a unique function
#' FCSex_df <- FCSex(Species_list=Cucurbita_splist,
#' Occurrence_data=CucurbitaData,
#' Raster_list=CucurbitaRasters,
#' Buffer_distance=50000,
#' Ecoregions_shp=ecoregions,
#' Gap_Map=TRUE)
#'
#'@references
#'
#' Khoury et al. (2019) Ecological Indicators 98:420-429. doi: 10.1016/j.ecolind.2018.11.016
#'
#' @export
FCSex <- function(Species_list, Occurrence_data, Raster_list, Buffer_distance=50000,Ecoregions_shp=NULL,Gap_Map=FALSE){
SRSex_df <- NULL
GRSex_df <- NULL
ERSex_df <- NULL
FCSex_df <- NULL
#Checking Occurrence_data format
par_names <- c("species","latitude","longitude","type")
if(missing(Occurrence_data)){
stop("Please add a valid data frame with columns: species, latitude, longitude, type")
}
if(isFALSE(identical(names(Occurrence_data),par_names))){
stop("Please format the column names in your dataframe as species, latitude, longitude, type")
}
# Load in ecoregions shp
if(is.null(Ecoregions_shp) | missing(Ecoregions_shp)){
if(file.exists(system.file("data/preloaded_data/ecoRegion/tnc_terr_ecoregions.shp",
package = "GapAnalysis"))){
Ecoregions_shp <- raster::shapefile(system.file("data/preloaded_data/ecoRegion/tnc_terr_ecoregions.shp",
package = "GapAnalysis"),encoding = "UTF-8")
} else {
stop("Ecoregions file is not available yet. Please run the function GetDatasets() and try again")
}
} else{
Ecoregions_shp <- Ecoregions_shp
}
#Checking if Gap_Map option is a boolean or if the parameter is missing left Gap_Map as FALSE
if(is.null(Gap_Map) | missing(Gap_Map)){ Gap_Map <- FALSE
} else if(isTRUE(Gap_Map) | isFALSE(Gap_Map)){
Gap_Map <- Gap_Map
} else {
stop("Choose a valid option for GapMap (TRUE or FALSE)")
}
# call SRSex
SRSex_df <- SRSex(Species_list = Species_list,
Occurrence_data = Occurrence_data)
# call GRSex
GRSex_df <- GRSex(Occurrence_data = Occurrence_data,
Species_list = Species_list,
Raster_list = Raster_list,
Buffer_distance = Buffer_distance,
Gap_Map = Gap_Map)
# call ERSex
ERSex_df <- ERSex(Species_list = Species_list,
Occurrence_data = Occurrence_data,
Raster_list = Raster_list,
Buffer_distance = Buffer_distance,
Ecoregions_shp=Ecoregions_shp,
Gap_Map = Gap_Map)
# join the dataframes based on species
if(is.data.frame(GRSex_df)){
FCSex_df <- merge(SRSex_df, GRSex_df, by ="species", all.x = TRUE)
} else {
FCSex_df <- merge(SRSex_df, GRSex_df$GRSex, by ="species", all.x = TRUE)
}
FCSex_df <- merge(FCSex_df, ERSex_df$ERSex, by = "species", all.x = TRUE)
# calculate the mean value for each row to determine fcs per species
FCSex_df$FCSex <- rowMeans(FCSex_df[, c("SRSex", "GRSex", "ERSex")])
#assign classes (exsitu)
FCSex_df$FCSex_class <- with(FCSex_df, ifelse(FCSex < 25, "HP",
ifelse(FCSex >= 25 & FCSex < 50, "MP",
ifelse(FCSex >= 50 & FCSex < 75, "LP",
"SC"))))
if(isTRUE(Gap_Map)){
FCSex_df <- list(FCSex=FCSex_df,GRSex_maps=GRSex_df$gap_maps,ERSex_maps=ERSex_df$gap_maps)
} else{
FCSex_df <- FCSex_df
}
return(FCSex_df)
}
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