Conesprings {NetIndices}R Documentation

Cone Spring ecosystem

Description

Cone spring ecosystem (Tilly, 1968) adapted for input - output analysis by Williams & Crouthamel (1972) in Szyrmer & Ulanowicz (1987, Fig. 1, p. 129) and Ulanowicz & Norden (1990, Fig. 1, p. 435).

This is example 1a from Latham (2006).

The food web comprises 5 functional compartments:

  • - Plants
  • - Detritus
  • - Bacteria
  • - Detritus feeders
  • - Carnivores

    and two export compartments

  • - usable export
  • - dissipation

    and one import compartment

  • - Inflows

    Usage

    Conesprings

    Format

    matrix with Tij values, where element (i,j) denotes flow from compartment j to i
    rownames and columnames are the components

    Author(s)

    Karline Soetaert <k.soetaert@nioo.knaw.nl>

    References

    Latham LG. 2006. Network flow analysis algorithms. Ecological Modelling 192: 586-600.

    Szyrmer, J., & Ulanowicz, R. E. (1987). Total flows in ecosystems. Ecol. Model. 35, 123..136.

    Tilly, L. J. (1968). The structure and dynamics of Cone Spring. Ecol. Monogr. 38, 169..197.

    Ulanowicz, R. E., & Norden, J. S. (1990). Symmetrical overhead in flow networks. Int. J. Systems Sci. 21, 429..437.

    Williams, M., & Crouthamel, D. (1972). Systems analysis of Cone Spring. Unpublished manuscript. University of Georgia, Athens, Georgia.

    Examples

    GenInd(Tij=Conesprings,Import="Inflows",
                     Export=c("Export","Dissipation"))
    AscInd(Tij=Conesprings,Import="Inflows",
                     Export=c("Export","Dissipation"),
                     Dissipation="Dissipation")
    UncInd(Tij=Conesprings,Import="Inflows",
                     Export=c("Export","Dissipation"))
    EffInd(Tij=Conesprings,Import="Inflows",
                     Export=c("Export","Dissipation"))
    EnvInd(Tij=Conesprings,Import="Inflows",
               Export=c("Export","Dissipation"),full=TRUE)

    [Package NetIndices version 1.1 Index]