getDiagonalDetritus: Calculate diagonal for dead (detritus) compartments

In dswdejonge/fwstability: Infer Food-Web Stability

Calculate diagonal for dead (detritus) compartments

Description

This function finds diagonal values for detritus compartments to be used in the Jacobian matrix. The calculation is based on the total amount of assimilated detritus in all consumers of detritus and the biomass of the detritus compartments, and is an implementation of the equation from Neutel & Thorne (2014).

Usage

getDiagonalDetritus(FM, BM, AE, dead_names)

Arguments

FM	A named square flowmatrix, source compartments as rows, sink compartments as columns. Should NOT contain external compartments. (required)
BM	A named numeric vector with biomasses of all compartments, must be in the same order as the flow matrix after externals are excluded. (required)
AE	A named numeric vector with assimilation efficiencies of all compartments, must be in the same order as the flow matrix after externals are excluded. Must be a fraction i.e. between 0 and 1 (required)
dead_names	Character vector with all names of detritus and nutrient compartments (everything that is not fauna). (required)

Value

This function returns a named numeric vector with the diagonal values for the detritus compartments in the food web (per unit time). It is important to review the units of the input data. If the FM is biomass per unit time then BM must be just biomass. If FM is biomass per unit time per surface area then BM must be biomass per surface area.

References

Neutel, A.M., Thorne, M.A.S., 2014. Interaction strengths in balanced carbon cycles and the absence of a relation between ecosystem complexity and stability. Ecol. Lett. 17, 651–661. https://doi.org/10.1111/ele.12266

dswdejonge/fwstability documentation built on Dec. 7, 2022, 7:24 p.m.