espace_nicheOv: espace_nicheOv Niche Overlap

In wallaceEcoMod/wallace: A Modular Platform for Reproducible Modeling of Species Niches and Distributions

espace_nicheOv Niche Overlap

Description

Function evaluates niche overlap between the two species for which the occurrence density grid was computed

Usage

espace_nicheOv(
  z1,
  z2,
  iter = 100,
  equivalency = FALSE,
  similarity = TRUE,
  logger = NULL
)

Arguments

z1	ecospat niche object for species 1 from espace_occDens.
z2	ecospat niche object for species 2 from espace_occDens.
iter	numeric. Number of iterations.
equivalency	logical. Whether to run equivalency test. Default is FALSE.
similarity	logical. Whether to run similarity test. Default is TRUE.
logger	Stores all notification messages to be displayed in the Log Window of Wallace GUI. Insert the logger reactive list here for running in shiny, otherwise leave the default NULL.

Details

The niche overlap quantification is based on the occurrence densities and the densities of environmental conditions available in the background extent that are estimated in the module Occurrence Density Grid. The function computes 4 different things; Schoener's D, unfilling, stability, expansion indices (Guisan et al. 2014 TREE), and tests for niche equivalency and niche similarity.

Value

A list of 4 elements if all is set to TRUE. Elements are overlap (Schoener's D), USE (ecospat.niche.dyn.index), equiv and simil.

Author(s)

Jamie Kass <[e-mail]>

Olivier Broennimann <[e-mail]>

See Also

espace_pca espace_occDens ecospat.niche.overlap ecospat.niche.dyn.index ecospat.niche.equivalency.test ecospat.niche.similarity.test

Examples

## Not run: 
sp.name1 <- "Bassaricyon_alleni"
sp.name2 <- "Bassaricyon_neblina"
envs <- envs_userEnvs(rasPath = list.files(system.file("extdata/wc",
                                           package = "wallace"),
                      pattern = ".tif$", full.names = TRUE),
                      rasName = list.files(system.file("extdata/wc",
                                           package = "wallace"),
                      pattern = ".tif$", full.names = FALSE))

occs.z1 <- read.csv(system.file("extdata/Bassaricyon_alleni.csv",
                    package = "wallace"))
occs.z2 <- read.csv(system.file("extdata/Bassaricyon_neblina.csv",
                    package = "wallace"))

bgPts.z1 <- read.csv(system.file("extdata/Bassaricyon_alleni_bgPoints.csv",
                     package = "wallace"))
bgPts.z2 <- read.csv(system.file("extdata/Bassaricyon_neblina_bgPoints.csv",
                     package = "wallace"))

occsExt.z1 <- raster::extract(envs, occs.z1[, c("longitude", "latitude")])
occsExt.z2 <- raster::extract(envs, occs.z2[, c("longitude", "latitude")])
bgExt.z1 <- raster::extract(envs, bgPts.z1[, c("longitude", "latitude")])
bgExt.z2 <- raster::extract(envs, bgPts.z2[, c("longitude", "latitude")])
pcaZ <- espace_pca(sp.name1, sp.name2,
                   occsExt.z1, occsExt.z2,
                   bgExt.z1, bgExt.z2)
occDens <- espace_occDens(sp.name1, sp.name2, pcaZ)
nicheOv <- espace_nicheOv(z1 = occDens[[sp.name1]],
                          z2 = occDens[[sp.name2]],
                          iter = 100, equivalency = TRUE,
                          similarity = TRUE)

## End(Not run)

wallaceEcoMod/wallace documentation built on March 24, 2024, 5:15 p.m.