Function to calculate the minimum size ratio (larger/next larger)
between species within an assemblage.
Usage
min_ratio(m = runif(20))
Arguments
m
a vector of non-negative trait measures, one for each species
Value
Returns the minimum size ratio difference between adjacent, ordered values.
Details
This index is based on the minimum size ratio (larger/next larger) difference between
consecutively ordered species in an assemblage. It is appropriate for
morphological traits, but not phenological ones.
References
Simberloff, D. and W.J. Boecklen. 1981. Santa Rosalia reconsidered: size
ratios and competition. Evolution 35: 1206-1228.