Table 1.

Species with significant affinities for middens or surrounding matrix sites in Colonet and San Quintín.

Surrounding matrix species		Midden species
San Quintín	Colonet	San Quintín	Colonet
Arthrocnemum subterminale	Acmispon glaber	Aesculus parryi	Astragalus trichopodus
Atriplex barclayana	Dudleya ingens	Artemisia californica	Encelia californica
Frankenia salina	Eriogonum fasciculatum	Astragalus trichopodus	Euphorbia misera
Juncus acutus	Hazardia ferrisiae	Atriplex canescens	Marah macrocarpa
Salicornia pacifica	Rosa minutifolia	Atriplex julacea	Rhus integrifolia
		Cylindropuntia californica
		Cylindropuntia prolifera
		Dudleya cultrata
		Echinocereus maritimus
		Ephedra californica
		Ferocactus fordii
		Gambelia juncea
		Lycium californicum
		Mammillaria dioica
		Mirabilis laevis
		Sphaeralcea ambigua

Note: We selected species that had significantly high or low axis loadings in the principal components analysis and that differed significantly in their frequency in middens as compared with the matrix according to a t-test on the binomial frequencies. In order to avoid errors derived from multiple comparisons, we used a Bonferroni correction with α = .001 for San Quintín and α = .003 for Colonet.