Table 4. Summary of SMA regression parameters (n, p, r ², α, β, 95%CI, respectively) for allometric relationships between plant functional traits (shoot height, root/shoot ratio, branch length and leaf number) and plant size of the macrophyte species Potamogeton maackianus across transects of two lakes: e1, e2, e3 in Erhai Lake and n1, n2, n3, n4 in Niushanhu Lake.

Transect	n	r2	p	α	LowCIα	UppCIα	β	LowCIβ	UppCIβ
Shoot height (cm)
e1	191	0.44	***	0.76	0.68	0.84	2.65	2.59	2.70
e2	164	0.28	***	0.74	0.65	0.84	2.66	2.59	2.74
e3	167	0.17	***	1.01	0.88	1.16	2.79	2.69	2.88
n1	38	0.56	***	0.94	0.75	1.17	2.55	2.40	2.71
n2	42	0.12	*	0.74	0.55	0.99	2.46	2.32	2.61
n3	48	0.58	***	0.55	0.45	0.67	2.28	2.19	2.36
n4	31	0.31	**	0.72	0.53	0.98	2.40	2.23	2.58
Root/shoot ratio (g g−1)
e1	191	0.19	***	−1.28	−1.46	−1.13	−1.78	−1.89	−1.68
e2	164	0.21	***	−1.25	−1.44	−1.09	−1.83	−1.97	−1.70
e3	167	0.20	***	−1.35	−1.55	−1.18	−1.96	−2.09	−1.84
n1	38	0.34	***	−1.18	−1.55	−0.90	−1.77	−2.02	−1.53
n2	42	0.35	***	−0.98	−1.26	−0.76	−1.66	−1.83	−1.50
n3	48	0.25	***	−0.98	−1.26	−0.76	−1.65	−1.85	−1.45
n4	31	0.28	**	−1.05	−1.44	−0.76	−1.65	−1.92	−1.39
Branch length (cm)
e1	191	0.55	***	2.35	2.13	2.58	2.98	2.84	3.12
e2	164	0.44	***	2.13	1.89	2.39	2.99	2.80	3.18
e3	167	0.39	***	2.37	2.10	2.67	2.96	2.77	3.15
n1	38	0.77	***	1.84	1.56	2.16	3.00	2.78	3.22
n2	42	0.75	***	1.90	1.62	2.23	2.97	2.77	3.16
n3	48	0.73	***	1.70	1.46	1.98	2.88	2.67	3.08
n4	31	0.64	***	1.14	0.91	1.43	2.19	1.99	2.39
Leaf number (N plant−1)
e1	191	0.52	***	1.72	1.56	1.90	2.65	2.55	2.76
e2	164	0.38	***	1.80	1.59	2.03	2.60	2.43	2.77
e3	167	0.40	***	2.05	1.82	2.31	2.81	2.65	2.97
n1	38	0.85	***	1.20	1.05	1.36	2.69	2.57	2.81
n2	42	0.58	***	1.27	1.03	1.56	2.68	2.51	2.85
n3	48	0.81	***	1.15	1.01	1.30	2.65	2.53	2.77
n4	31	0.88	***	1.20	1.05	1.36	2.66	2.54	2.78

n, samples number; r ², correlation coefficient; p-values refer to correlation analyses following standardized major axes (SMA) procedures (see the Material and Methods section); α, slope; CIα, 95% CIs of the slope; β, intercept; CIβ, 95% CIs of the intercept;

^*: p<0.05; **: p<0.01; ***: p<0.001.