Table 2.

Results of Wilcoxon tests investigating whether the distribution of NRI% values has medians significantly different from 50, and of t-tests investigating whether the distribution of NTI values have means significantly different from zero, for all clades and each clade separately. Key: monkeys, New World monkeys (Platyrrhini); possums, Phalangeriformes; squirrels, North American ground squirrels (Marmotini). n, Number of communities. ^*p<0.05; ^**p<0.01.

clade	n	median NRI% (first and third quartiles)	V	mean NTI±s.e.	t
monkeys	28	31.2 (19.6, 46.9)	67**	−0.401±0.118	−3.40**
possums	10	49.5 (20.5, 73.1)	27	−0.055±0.261	−0.21
squirrels	75	37.1 (25.0, 64.0)	1095	−0.222±0.108	−2.06*
all	113	36.1 (20.8, 63.9)	2201**	−0.251±0.081	−3.12**