MetaLandSim (version 1.0.4)

species.graph: Simulate landscape occupation

Description

Given a set of parameters, this function allows to simulate the occupation of an empty landscape, class "metapopulation".

Usage

species.graph(rl, method = 'percentage', parm, nsew = 'none', plotG = TRUE)

Arguments

rl

Object of class "landscape".

method

One of the following (default 'percentage'): click - individually select the patches with occurrence of the species by clicking on the map. Use only for individual landscape simulations. percentage - percentage of the patches to be occupied by the species. number - number of patches to be occupied by the species.

parm

Parameter to specify the species occurrence - either percentage of occupied patches or number of occupied patches, depending on the method chosen.

nsew

'N', 'S', 'E', 'W' or none - point of entry of the species in the landscape. By default set to "none".

plotG

TRUE/FALSE, to show graphic output.

Value

Returns a list, with the following elements:

• mapsize - Landscape mosaic side length, in meters.

• minimum.distance - Minimum distance between patches centroids, in meters.

• mean.area - Mean patch area in hectares.

• SD.area - Standard deviation of patches area.

• number.patches - Total number of patches.

• dispersal - Species mean dispersal ability, in meters.

• distance.to.neighbours - Data frame with pairwise distance between patches, in meters.

• nodes.characteristics - Data frame with patch (node) information (coordinates, area, radius, cluster, distance to nearest neighbour, ID and species).

An additional field, colour, has only graphical purposes.

See Also

rland.graph, simulate_graph, remove.species

Examples

# NOT RUN {
data(rland)

##Creating a 50% occupation in an empty landscape (using the "landscape" dataset):

sp1 <- species.graph(rl=rland, method="percentage", parm=50, nsew="none", plotG=TRUE)
# }