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NetIndices (version 1.4.4.1)

Conesprings: 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

Arguments

Format

matrix with Tij values, where element (i,j) denotes flow from compartment j to i

rownames and columnames are the components.

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 Unpublished manuscript.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

Run this code
# NOT RUN {
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)
# }

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