Spurious and functional correlates of the isotopic composition of a generalist across a tropical rainforest landscape

Table 3 Regression models to test for the most parsimonious associations with (δ¹³C_{A. araneoides}- δ¹³C_baseline).

Model (independent factors)	r²	SS	p	AIC
Leaf litter decomposition rate	0.216	0.07	0.293	-19.66
Log (mass, standing litter)	< 0.01	< 0.001	0.987	-17.96
Total soil P (0-10 cm depth)	0.183	0.06	0.339	-19.36
Colony size	0.329	0.10	0.179	-20.74
Colony growth	0.002	< 0.001	0.917	-17.97
Litter-ant density	0.003	0.03	0.908	-17.98
Litter-ant richness	0.014	0.004	0.799	-18.06
Total soil P, colony size	0.394	0.12	0.366	-19.47
Total soil P, leaf litter decomposition rate	0.399	0.12	0.361	-19.52
Leaf litter decomposition rate, colony size	0.907	0.28	0.009	-32.61*
Total soil P, leaf litter decomposition rate, colony size	0.929	0.28	0.032	-32.42

The most parsimonious model is indicated by *. All significant relationships were positive.

ISSN: 1472-6785