Helianthemum {ecespa}R Documentation

Spatial point pattern of Helianthemum squamatum adult plants and seedlings

Description

Locations of H. squamatum adult plants and seedlings in a 6 m x 7 m plot over gypsum soil in Chinchón (near Madrid, Spain). These are part of the data collected by Romao (2003) that have been analyzed several times (Escudero et al.2005, De la Cruz 2006, De la Cruz et al. in press. ). The coordinates of the plans are given in cm.

Usage

data(Helianthemum)

Format

An object of class "ppp" of spatstat representing the point pattern of plants locations marked by their type. See ppp.object for details of the format.The dataset has 866 points with the following levels:

adultHS
adult H. squamatum plants
deadp
dying H. squamatum seedlings
survpl
surviving H. squamatum seedlings

Source

Romao, R.L. 2003. Estructura espacial de comunidades de gipsófitos: interacciones bióticas y constricciones abióticas. Tesis Doctoral. Universidad Politécnica de Madrid.

References

De la Cruz, M. 2006. Introducción al análisis de datos mapeados o algunas de las (muchas) cosas que puedo hacer si tengo coordenadas. Ecosistemas 15 (3): 19-39. http://www.revistaecosistemas.net/pdfs/448.pdf.

De la Cruz, M., Romao, R.L., Escudero, A. & Maestre, F.T. In press. Where do seedlings go? A spatio-temporal analysis of early mortality in a semiarid specialist. Ecography.

Escudero, A., Romao, R.L., De la Cruz, M. & Maestre, F. 2005. Spatial pattern and neighbour effects on Helianthemum squamatum seedlings in a Mediterranean gypsum community. J. Veg. Sci., 16: 383-390.

Examples

data(Helianthemum)
plot(Helianthemum)

[Package ecespa version 1.1-1 Index]