Table 1. Abbreviations used for groups of animals and groups of rumen samples.

Grouping	Basis	Abbreviation			Name of column in File S1
		High-CH4	Low-CH4
CH4 group	Animals by 4-day average CH4 yield	Hi	Lo		CH4Group
CA type	Samples grouped by CA coordinates [Bacteria]	HM	LM1	LM2	CAType
Ruminotype	Designated ruminotype [Bacteria]	H	Q	S	Ruminotype

Groups of animals and rumen samples were classified based on CH₄ yield only, or based on CH₄ yield and clustering in correspondence analysis, and corresponding abbreviations of designated ruminotypes.