Geographical Gradients in Argentinean Terrestrial Mammal Species Richness and Their Environmental Correlates

Table 7

Variation partitioning of species richness (SR). The shown values are the proportion of variation in SR corresponding to a geographical trend attributable to environmental causes (EGT), the proportion corresponding to a pure geographic trend (PGT), the percentage of the total geographical trend environmentally explained (% EGT) and the percentage of the geographic trend attributable to a pure geographic effect (% PGT). Variable codes as in Table 1 and Figure 2. In bold are the values corresponding to pure geographic trends that are significant according to the partial correlation analysis.

Mammal group	Geographical Gradient	EGT	PGT	%EGT	%PGT
SRm	La	0.237	0.083	74,06	25.94
SRx		0.458	0.079	85,29	14.714
SRu		0.327	0.194	62,76	37.24
SRm	NNE-SSW axis	0.198	0.179	52,52	47.484
SRx		0.499	0.06	89,27	10.734
SRu		0.324	0.034	90,50	9.50
SRm	Lo	0.206	0.024	89,56	10.43
SRx		0.291	0.00	100	0.00