equ: Niche overlap for Oxalis enneaphylla and O. lacinita

Description Usage Format Source References Examples

Description

Objects equ and sim contain the results of the niche.equivalency.test and the bg.similarity.test (Warren et al. 2008) for Oxalis enneaphylla and O. laciniata from section Palmatifoliae.

Usage

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Format

A list containing five elements:

method

Name of the test.

species

Names of the two species compared.

statistic

Test statistics D and I of niche overlap based on Schoeners D and modified Hellinger distances.

p.value

p-values for the test statistics (if method = "niche equivalency test").

null

Formulation of the null hypothesis.

null.distribution

Null distributions of D and I derived from randomization (if method = "niche equivalency test").

ci.x.randomY

Confidence intervals based on null distributions (if method = "background similarity test").

ci.y.randomX

Confidence intervals based on null distributions (if method = "background similarity test").

nd.x.randomY

Null distributions of D and I derived from randomization (if method = "background similarity test").

nd.y.randomX

Null distributions of D and I derived from randomization (if method = "background similarity test").

Source

C. Heibl, unpublished data.

References

Warren, D., R.E. Glor, & M. Turelli. 2008. Environmental niche equivalency versus conservatism: quantitative approaches to niche evolution. Evolution. 62: 2868-2883.

Examples

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# plot results of niche equivalency test
data(equ)
plot(equ)

# plot results of background similarity test
data(sim)
plot(sim)


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