AssignTrophicLevel: Assign trophic levels and abundances to a set of species

In DavidGarciaCallejas/DGC: David Garcia-Callejas' functions

Description

Assigns a trophic level and abundance to a given number of species, constrained by ecologicaly plausible assumptions

Usage

AssignTrophicLevel(num.sp, trophic.levels,
  abundance.distribution = "power-law", scaling.law.tl = F,
  scaling.exponent.tl = 0, basal.abundance = 1000, ...)

Arguments

num.sp	number of species
trophic.levels	number of integer trophic levels in the community
abundance.distribution	S.A.D. of the community, either "uniform", "power-law", "lognormal" or "gambin"
scaling.law.tl	whether abundances scale with trophic level following a power law
scaling.exponent.tl	exponent of the power law trophic level abundance scaling
basal.abundance	abundance of the basal trophic level
...	additional parameters to specify the S.A.D. (see GenerateProbNumbers)

Value

dataframe containing species integer ID, abundances and trophic levels

Author(s)

David Garc<c3><ad>a-Callejas, [e-mail]

Examples

abundance.list <- AssignTrophicLevel(num.sp = 20, 
trophic.levels = 4, abundance.distribution = "gambin", scaling.law.tl = TRUE, scaling.exponent.tl = 0.75, 
basal.abundance = 1000, gambin.alpha = 2, gambin.maxoctave = 8)

DavidGarciaCallejas/DGC documentation built on May 6, 2019, 1:54 p.m.