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.
data(Helianthemum)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:
adult H. squamatum plants
dying H. squamatum seedlings
surviving H. squamatum seedlings
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.
De la Cruz, M., Romao, R.L., Escudero, A. and Maestre, F.T. 2008. Where do seedlings go? A spatio-temporal analysis of early mortality in a semiarid specialist. Ecography,31(6): 720-730. tools:::Rd_expr_doi("10.1111/j.0906-7590.2008.05299.x").
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. Journal of Vegetation Science, 16: 383-390. tools:::Rd_expr_doi("10.1111/j.1654-1103.2005.tb02377.x").
data(Helianthemum)
plot(Helianthemum)
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