Table 1.

Source and taxonomic affiliation of the strains used for this study.

Strain ID	Taxonomic affiliation	Source	Isolation method
D111	Betaproteobacteria, Hylemonella	Lake Itasca, MN	BMM 100:1
D201	Betaproteobacteria, Hylemonella	Long Lake, MN	BMM 100:1
D206	Alphaproteobacteria, Brevundimonas	Long Lake, MN	BMM 100:1
D301	Alphaproteobacteria, Rhizobium	Long Lake, MN	BMM 100,000:1
D304	Alphaproteobacteria, Rhizobium	Long Lake, MN	BMM 100,000:1
D611	Alphaproteobacteria, Brevundimonas	Long Lake, MN	Sterile lake water
D703	Alphaproteobacteria, Brevundimonas	Long Lake, MN	Sterile lake water
D712	Alphaproteobacteria, Brevundimonas	Long Lake, MN	Sterile lake water
D801	Alphaproteobacteria, Brevundimonas	Long Lake, MN	Sterile lake water
D905	Alphaproteobacteria, Brevundimonas	Long Lake, MN	Sterile lake water
D909	Alphaproteobacteria, Brevundimonas	Lake Itasca, MN	Nutrient broth
D1207	Betaproteobacteria, Achromobacter	Long Lake, MN	Nutrient broth
D1303	Betaproteobacteria, Achromobacter	Long Lake, MN	Nutrient broth
P026	Unique partial sequence	Long Lake, MN	BMM 100,000:1
P045	Alphaproteobacteria, Agrobacterium	Long Lake, MN	Nutrient broth
P078	Actinobacteria, Microbacterium	Lake Itasca, MN	Nutrient broth
P089	Not sequenced	Lake Itasca, MN	Nutrient broth
UND-FW12	Betaproteobacteria, betII (Pnec)	Pleasant Lake, IN	WC minimal medium
UND-L13	Betaproteobacteria	Little Long Lake, MI	WC minimal medium
UND-L18	Gammaproteobacteria, gamIV gamIV-A Pseudo A1	Little Long Lake, MI	WC minimal medium
UND-L41A	Alphaproteobacteria, alflI Brev	Little Long Lake, MI	WC minimal medium
UND-Pnec	Polynucleobacter necessarius	DSMZ culture collection	–
UND-WG21	Bacteroidetes, Flavobacteria	Wintergreen Lake, MI	WC minimal medium
UND-WG36	Gammaproteobacteria, gamII gamII-A	Wintergreen Lake, MI	WC minimal medium