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.
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".
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)