LumpTrophicSpecies: Lump trophic species

Description

Lump trophic species.

Usage

LumpTrophicSpecies(community, include.isolated=TRUE, title=NULL, ...)

Value

A Community.

Arguments

community: an object of class Community.
include.isolated: if TRUE then nodes for which IsIsolatedNode is TRUE are given their own trophic species number. If FALSE the isolated species are assigned a trophic species of NA.
title: the title of the new Community.
...: other parameters to LumpNodes.

Author

Lawrence Hudson

Details

Aggregates nodes that share identical sets of prey and predators.

References

Briand, F and Cohen, J.E. 1984 Community food webs have scale-invariant structure Nature 307, 264--267.

Jonsson, T. and Cohen, J.E. and Carpenter, S. R. 2005 Food webs, body size, and species abundance in ecological community description. Advances in Ecological Research 36, 1--84.

Pimm, S.L. and Lawton, J.H. and Cohen, J.E. 1991 Food web patterns and their consequences Nature 350, 669--674.

Williams, R.J. and Martinez, N.D. 2000 Simple rules yield complex food webs 404, 180--183.

Examples

Run this code

data(TL84)
NumberOfNodes(TL84)

TL84.lumped <- LumpTrophicSpecies(TL84)

length(unique(TrophicSpecies(TL84)))    # 22 trophic species in TL84...
NumberOfNodes(TL84.lumped)              # ... and 22 nodes in the lumped web

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