TABLE 3.

The relative abundances of the most frequent OTUs in the grain and aerosol samples, depending on the farming system

Taxonomic assignmenta	GenBank accession no.	Frequency (%) by sample type and farm system						Mean relative abundance (%) by sample type and farm system
		Grain sample			Aerosol sample			Grain sample			Aerosol sample
		Conventional	Extensive	Organic	Conventional	Extensive	Organic	Conventional	Extensive	Organic	Conventional	Extensive	Organic
Epicoccum nigrum	KT886532	100	100	100	100	100	100	56.4	57.3	54.2	60.8	60.3	63.2
Passalora robiniae	KT886526	100	100	100	100	100	100	14.9	12.8	20.6	20.5	17.3	20.1
Alternaria ethzedia	KT886531	100	100	100	100	100	100	8.5	8.2	3.6	5.5	4.8	4.3
Cryptococcus victoriae	KT886536	100	100	100	98	94	100	3.3	1.8	2.3	3.4	2.7	2
Cladosporium cladosporioides	KT886527	99	100	100	98	100	100	2.4	2.4	4	1.7	2	3.1
Didymella exitialis	KT886541	97	100	100	83	100	100	1.8	2.6	1.2	1.1	1.7	1
Cryptococcus sp.	KT886538	91	100	100	64	83	50	0.7	0.8	0.5	0.5	1	0.3
Alternaria alternata	KT886534	94	96	88	85	83	100	1.4	1	1.5	0.7	0.6	1.8
Alternaria infectoria	KT886761	91	89	88	53	61	63	0.8	0.8	0.5	0.4	0.3	0.2
Fusarium graminearum	KT886533	90	89	63	51	61	0	2.2	3.9	0.9	0.6	0.4	0
Mycosphaerella graminicola	KT886549	75	89	25	47	94	25	0.4	1.5	0.4	0.3	1.3	0.1
Fusarium poae	KT886562	91	81	75	43	50	0	0.9	0.5	0.4	0.2	0.2	0
Gibberella sp.	KT886557	84	78	63	34	56	25	1.1	0.5	0.5	0.3	0.2	0
Sporobolomyces roseus	KT886529	90	74	100	81	67	75	0.7	0.6	1.9	0.7	1.5	0.7
Aureobasidium pullulans	KT886530	59	74	88	42	61	25	0.5	1	1.8	0.1	0.2	0
Microdochium nivale	KT886558	68	70	38	64	89	50	0.4	0.7	0.1	0.4	1.2	0.1
Cryptococcus wieringae	KT886535	48	63	88	42	50	63	0.4	0.2	1.1	0.2	0.7	0.3

^aIn bold are the known allergenic or toxigenic species.