Last chance! 50% off unlimited learning
Sale ends in
Lump trophic species.
LumpTrophicSpecies(community, include.isolated=TRUE, title=NULL, ...)
A Community
.
an object of class Community
.
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
.
the title of the new Community
.
other parameters to LumpNodes
.
Lawrence Hudson
Aggregates nodes that share identical sets of prey and predators.
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.
TrophicSpecies
, LumpNodes
,
IsIsolatedNode
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
Run the code above in your browser using DataLab