cheddar (version 0.1-639)

NumberOfTrophicLinks: Number of trophic links

Description

The number of trophic links in Community.

Usage

NumberOfTrophicLinks(community) 
LinkageDensity(community) 
DirectedConnectance(community)

Value

A single number.

Arguments

community

an object of class Community.

Author

Lawrence Hudson

Details

NumberOfTrophicLinks returns the total number of links in the web, including cannibalistic links.

LinkageDensity returns the NumberOfTrophicLinks / NumberOfNodes, including cannibalistic links and isolated nodes.

DirectedConnectance returns NumberOfTrophicLinks / NumberOfNodes^2, including cannibalistic links and isolated nodes.

References

Martinez, N. D. 1991 Artifacts or attributes? Effects of resolution on the Little Rock Lake food web. Ecological Monographs 61, 367--392.

See Also

NumberOfNodes

Examples

data(TL84)

NumberOfTrophicLinks(TL84)
LinkageDensity(TL84)
DirectedConnectance(TL84)