Table 1.

Microorganisms with nourishment-associated activity in the gastro enteral tract of horses

Kingdom	Family	Genus	Species	Putative effects	Ref.
Bacteria	Ruminococcaceae	Ruminococcus	spp.	cellulolytic, fibrolytic bacteria	[167, 168]
			favefaciens	plant wall degradation	[169]
			albus	plant wall degradation	[169, 170]
	Fibrobacteraceae	Fibrobacter	succinogenes	monosaccharide and glycoside degradation	[169–172]
			intestinalis	plant wall degradation	[171]
	Streptococcaceae	Streptococcus	spp.	amyloytica	[173]
			bovis/equinus	L-lactate producer	[174]
	Lactobacillaceae	Lactobacillus	salivarius/ mucosae	L-lactate producer, decarboxylating amino acids, vascoactive amines	[174], [137]
			bulgaricus/ delbrueckii	L-lactate producer	[174]
			crispatus	lactic acid bacteria	[175]
			johnsonii	lactic acid bacteria	[175]
			reuteri	lactic acid bacteria	[175]
			equigenerosi	lactic acid bacteria	[176]
			hayakitensis	lactic acid bacteria	[176]
			buchneri	lactic acid bacteria	[176]
			vitulinus	lactic acid bacteria	[176]
	Acidaminococcaceae	Mitsuokella	jalaludinii	D-lactate producer	[174]
		Phascolarctobacterium	spp.	fibre fermentersb	[168]
	Veillonellaceae	Veillonella	gazogenes/ alcalescens	lactat utilizing bacteria	[177]
	Lachnospiraceae	Butyrivibrio	spp.	cellulolytic, fibrolyticc	[167]
			fibrosolvens	amylolytic	[173]
		Blautia	spp.	fibre fermenters	[168]
	Clostridiaceae	Clostridium	spp.	cellulolytic, fibrolyticd	[167]
	Eubacteriaceae	Eubacterium	spp.	cellulolytic, fibrolytic	[167]
	Prevotellaceae	Prevotella	spp.	fibre fermenters	[168]
	Succinivibrionaceae	Ruminobacter	amylophilus	amylolytic	[173]
	Enterococcaceae	Enterococcus	faecalis	amylolytic	[173]
Fungi				fiber degradation	[178]
	Neocallimastigaceae	Piromyces	equi	cellulose degradation	[179]
Protozoa				hemicellulose, pectin degradation	[99]
Bacterio-phages				regulating bacterial species distribution	[180]
Archaea				methanogensf	[80], [81]