TABLE 4.

Correlation coefficient (β), 95% confidence intervals (CI) of coefficient, and relative importance values for the effects of variables on tuber density and biomass of Shahu Lake, a sublake of Poyang Lake, China

Variable	β	95% CI	Relative importance
Tuber density
Last winter temperature	–4.26	–8.36 to –0.16	0.61
Autumn temperature	5.66	–1.99 to 13.30	0.30
Spring water level	–10.26	–19.65 to –1.20	0.59
Summer water level	–4.57	–9.25 to 0.12	0.28
Tuber biomass
Last winter temperature	–2.56	–4.89 to –0.23	0.67
Spring temperature	2.42	–1.35 to 6.18	0.22
Autumn temperature	5.05	0.45 to 9.66	0.70
Summer water level	–1.66	–4.21 to 0.90	0.26