TABLE 1.

Descriptive statistics of the samples used in the study^a

Sample IDb	Source	Medium	No. of V3V4 reads	No. of species	Species Chao1	KS			AD
						No. of reads	No. of OBUs	Chao1	No. of reads	No. of OBUs	Chao1
W_	Seawater		38,958 ± 29,461	1,086	1,378 ± 61	112,548 ± 12,355	5,312	6,065 ± 81	144,340 ± 16,503	2,463	3,292 ± 109
S_	Sediment		332,883 ± 218,224	1,099	1,452 ± 74	134,393 ± 34,158	10,314	11,072 ± 70	118,985 ± 14,794	5,369	5,691 ± 43
MBA_W	Seawater	Marine broth	409,450 ± 11,805	199	304 ± 47	169,630 ± 69,150	619	1,853 ± 312	277,375 ± 63,993	329	1,972 ± 657
MBA_S	Sediment	Marine broth	263,219 ± 198,978	203	354 ± 63	119,737 ± 8,989	873	2,531 ± 302	217,702 ± 86,319	960	2,208 ± 201
MBG_W	Seawater	Marine broth	199,321 ± 191,228	149	274 ± 61	166,410 ± 69,832	1,115	4613 ± 647	129,759 ± 11,457	463	1,220 ± 183
MBG_S	Sediment	Marine broth	176,332 ± 145,515	222	424 ± 79	135,917 ± 44,099	1,782	9,248 ± 1,341	229,762 ± 42,865	1,281	4,602 ± 627
SWA_W	Seawater	Seawater	353,591 ± 204,575	245	360 ± 47	146,247 ± 25,299	757	1,273 ± 108	240,077 ± 64,379	1,002	2,457 ± 282
SWA_S	Sediment	Seawater	171,032 ± 68,737	342	845 ± 169	71,587 ± 34,631	1,43	10,915 ± 2,230	197,024 ± 30,947	774	1,788 ± 182
SWG_W	Seawater	Seawater	153,498 ± 77,025	180	330 ± 70	113,337 ± 32,470	847	2,060 ± 248	289,908 ± 73,856	1,33	3,810 ± 425
SWG_S	Sediment	Seawater	65,104 ± 52,877	184	363 ± 77	131,844 ± 5,650	1,722	7,542 ± 999	162,169 ± 103,467	690	2,484 ± 399
DFD	Soil					50,400 ± 19,622	6,966	7,067 ± 777	83,156 ± 19,511	1,59	1,629 ± 428

^aValues are summarized for all samples within each sample type and given as sequence reads, observed species and KS and AD operational biosynthetic units (OBUs) and the corresponding Chao1 indices. Values are given as means ± standard deviations.

^bID, identifier.