Table 5. Summary of differential abundance between non-yield-decline and yield-decline samples and had met several other selection criteria (see the text) for a number of bacterial and fungal OTUs, together with the log2-fold change (LFC) and possible roles they played in the yield decline of strawberry, which was inferred from published studies and/or from online resources.

			Significant comparisons
Family	Genus	Species	IDa	Mean LFC	Possible roles
Bacteria
Bacillaceae	Bacillus	flexus	abc	2.66	Biocontrol, PGPRb
		Unidentified	ade	2.80	Biocontrol, PGPR
Bradyrhizobiaceae	Bosea	genosp.	cfg	2.17	Nitrogen fixation
Rhizobiaceae	Agrobacterium	Sullae	abcde	3.38	Nitrogen fixation
Rhodospirillaceae	Skermanella	Unidentified	deg	−2.79	Usually in anaerobic aquatic environments
Methylophilaceae	Methylotenera	mobilis	aceg	3.26	Nitrogen cycling in natural environments
Methylophilaceae	Unidentified	Unidentified	acef	3.78	Nitrogen cycling in natural environments
Nitrosomonadaceae	Unidentified	Unidentified	cfg	2.22	Oxidize ammonia into nitrite
Geobacteraceae	Geobacter	Unidentified	cfg	−2.21	Anaerobic respiration
Pelobacteraceae	Unidentified	Unidentified	cef	−2.52	Anaerobic respiration
Pseudomonadaceae	Pseudomonas	Unidentified	acdeg	2.91	PGPR
	Unidentified	Unidentified	ace	3.14	PGPR
Fungi (Ascomycota)
Trichocomaceae	Paecilomyces	GZU_BCECYN4_3	de	3.66	Killing nematodes
Incertae_sedis	Tetracladium	WMM_2012d	bd	−2.91	Water-logging rich fungus
Incertae_sedis	Ilyonectria	coprosmae	ace	−4.99	Including Cylindrocarpon spp. or Cylindrocarpon-like fungi that can cause non-specific root rot
		robusta	ae	−5.18

^aIdentity of individual comparisons for which differences in microbial abundance were statistically different; a – EM13/HB13 vs. HB12/PV12; b – EM13 vs. HB12; c – EM13 vs. PV12; d – HB13 vs. HB12; e – HB13 vs. PV12; f – chloropicrin-treated vs. others at PV12 (2013 samples); and g – chloropicrin-treated vs. control at HB12.

^bPGPR, plant growth-promoting rhizobacteria.