thibaut_connolly_dsr: Calculate the Thibaut and Connolly diversity-stability...

In seananderson/ecofolio: Tools to quantify metapopulation portfolio effects

Description

Calculate the Thibaut and Connolly diversity-stability relationship

Usage

thibaut_connolly_dsr(x, synchrony, z, overyielding)

Arguments

x	A matrix or dataframe of abundance or biomass data. The columns should represent different subpopulations or species. The rows should represent the values through time.
synchrony	The Loreau and de Mazencourt synchrony index. See synchrony.
z	Taylor's power law exponent from variance = c * mean^z. See fit_taylor.
overyielding	The overyielding coefficient. This reflects the increase in abundance or biomass with increasing diversity and is relevant to community portfolio effects.

Value

A list containing the CV of the observed community (portfolio) cv_p expected CV of the community in monoculture cv_1 and the ratio of the monoculture CV to the observed community or portfolio CV pe.

References

Thibaut, L.M. & Connolly, S.R. (2013). Understanding diversity-stability relationships: towards a unified model of portfolio effects. Ecology Letters, 16, 140-150.

Examples

dat = data.frame(x1 = rnorm(20, 10), x2 = rnorm(20, 10), x3 = rnorm(20,10))
thibaut_connolly_dsr(dat, synchrony = 0.7, z = 2, overyielding = 1)

seananderson/ecofolio documentation built on May 29, 2019, 4:25 p.m.