Niche overlap for Oxalis enneaphylla and O. lacinita

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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C. Heibl, unpublished data.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)