Table 1.

Diversity estimates of microorganisms within each rhizosheath-root system compartment of the three speargrasses species

Microbe	Compartment	Plant species	N. sequence	Richness (N. SV)	Evenness (eH/SV)
Bacteria	Root	S. sabulicola	3336 ± 304	43 ± 6 (a)	0.416 ± 0.056 (a)
		S. seelyae	3760 ± 481	47 ± 5 (a)	0.472 ± 0.056 (a)
		C. spinosa	4526 ± 1031	29 ± 4 (a)	0.457 ± 0.059 (a)
		Total	3874 ± 603	40 ± 9 (A)	0.448 ± 0.029 (A)
	Rhizosheath	S. sabulicola	30,245 ± 1849	447 ± 12 (ab)	0.352 ± 0.032 (a)
		S. seelyae	33,743 ± 2521	491 ± 23 (a)	0.261 ± 0.022 (a)
		C. spinosa	27,905 ± 3998	391 ± 35 (b)	0.271 ± 0.026 (a)
		Total	30,631 ± 2938	443 ± 50 (B)	0.295 ± 0.05 (B)
	Rhizosphere	S. sabulicola	24,771 ± 1709	421 ± 18 (a)	0.375 ± 0.025 (a)
		S. seelyae	45,134 ± 3815	637 ± 26 (b)	0.279 ± 0.022 (b)
		C. spinosa	28,668 ± 3576	495 ± 49 (a)	0.373 ± 0.016 (a)
		Total	32,858 ± 10,809	518 ± 110 (C)	0.342 ± 0.055 (B)
	Bulk	Bulk	60,006 ± 4861	514 ± 42 (BC)	0.287 ± 0.013 (B)
Fungi	Rhizosheath	S. sabulicola	59,859 ± 7978	59 ± 6 (a)	0.156 ± 0.022 (a)
		S. seelyae	64,262 ± 5400	80 ± 4 (bc)	0.168 ± 0.018 (a)
		C. spinosa	67,420 ± 2531	71 ± 4 (ac)	0.196 ± 0.014 (a)
		Total	63,847 ± 3798	70 ± 11 (A)	0.173 ± 0.021 (A)
	Rhizosphere	S. sabulicola	64,100 ± 7471	88 ± 8 (a)	0.375 ± 0.025 (a)
		S. seelyae	83,517 ± 6803	68 ± 7 (a)	0.118 ± 0.018 (b)
		C. spinosa	74,045 ± 2396	86 ± 6 (a)	0.183 ± 0.031 (b)
		Total	73,887 ± 9709	81 ± 11 (A)	0.225 ± 0.134 (A)
	Bulk	Bulk	110,997 ± 26,291	20 ± 2 (B)	0.377 ± 0.06 (B)

Mean (± SD) of sequences, richness (number of SVs) and evenness were calculated for bacteria and fungi. Lowercase and uppercase letters in parenthesis indicated the results of post hoc multiple comparison (Tukey test) among plant species and rhizosheath-root system compartments, respectively. SV sequence variant, H/SV Shannon value divided by total number of sequence variant