Land use alters cross-ecosystem transfer of high value fatty acids by aquatic insects

Environmental Sciences Europe

Table 1 Results of the analysis of similarities (ANOSIM) for the fatty acid (FA) profiles

Organism group	Season	R	p-value	Sample size
Spiders	Spring	− 0.02	0.858	91
	Summer	− 0.02	0.858	52
	Autumn	0.02	0.858	87
Mayflies	Spring	0.13	0.014	58
	Summer	0.08	0.06	69
	Autumn	0.07	0.858	32
Stoneflies	Spring	− 0.16	0.858	20
Stoneflies	Summer	0.14	0.858	14
Caddisflies	Spring	0.15	0.504	16
	Summer	0.1	0.026	69
	Autumn	0.05	0.858	39
Non-biting midges	Spring	0.12	0.036	65
	Summer	0.1	0.06	76
	Autumn	− 0.01	0.858	55

Spiders and aquatic insects per order were compared within the same season between forested and agricultural sites. The Benjamini–Hochberg method was used to adjust the p-values. Since stoneflies were not caught in agriculture in autumn, no ANOSIM could be conducted. Differences between forested and agricultural sites were indicated by R values: R < 0.25 barely separated, R < 0.5 clearly separated with some overlap, R > 0.75 well separated [89]. R < 0 greater dissimilarity within than between groups [90]. Bold values indicate significant p-values (i.e., p-values < 0.05)