an object of class "cca", the result of a call to
vegan::cca() or vegan::capscale().
axes
numeric; which axes to plot, given as a vector of length 2.
geom
character; which geom to use for the species (variables) and
sites (samples) layers. A vector of length 2; if a vector of length 1,
geom is extended to the required length.
layers
character; which scores to plot as layers
legend.position
character or two-element numeric vector; where to
position the legend. See ggplot2::theme() for details. Use "none"
to not draw the legend.
title
character; subtitle for the plot.
subtitle
character; subtitle for the plot.
caption
character; caption for the plot.
ylab
character; label for the y-axis.
xlab
character; label for the x-axis.
arrow.col
colour specification for biplot arrows and their labels.
...
Additional arguments passed to the fortify() method.