Dietary variation and food selection by mayfly grazers in a subtropical mountain stream

Zoological Studies

Table 2 Results of the multivariate permutational analysis

Samples	df	SS	MS	Pseudo-F	p(perm)
Insect-excluded bricks
Season	1	2,046	2,046.1	6.775	0.0005
Residuals	17	5,134	302.0
Total	18	7,180
Gut contents of mayflies
Season	1	1,198	1,198.4	3.995	0.0078
Treatment	1	873	873.3	2.911	0.0309
Season × Treatment	1	318	318.3	1.061	0.3698
Residuals	25	7,500	300
Total	28	10,443
Insect-excluded bricks + gut contents of mayflies
Season	1	389	388.7	2.810	0.0141
Treatment	2	2,753	1,376.4	9.948	0.0001
Season × treatment	2	1,447	723.3	5.228	0.0001
Residuals	43	5,949	138.4
Total	48	10,816

Results of the multivariate permutational analysis (PERMANOVA) of effects of season and treatment (mayfly taxon or insect-exclusion) on the algal communities in the Chichiawan Stream. p (perm), possible permutations. Statistically significant p values (<0.05) are highlighted in bold font.