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 Chinchon (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. 2007). 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
deadpl
dying H. squamatum seedlings
survpl
surviving H. squamatum seedlings

Source

Romao, R.L. 2003. Estructura espacial de comunidades de gipsofitos: interacciones bioticas y constricciones abioticas. Tesis Doctoral Inedita. Universidad Politecnica de Madrid.

References

De la Cruz, M. 2006. Introduccion al analisis de datos mapeados o algunas de las (muchas) cosas que puedo hacer si tengo coordenadas. Ecosistemas. 2006/3. http://www.revistaecosistemas.net/articulo.asp?Id=488&Id_Categoria=1&tipo=portada.

De la Cruz, M., Romao, R.L. & Escudero, A. 2007. Where do seedlings go? A spatio-temporal analysis of early mortality in a semiarid specialist. Ecography, in revision.

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 1.0-2 Index]