Moderate inundation stimulates plant community assembly in the drawdown zone of China’s Three Gorges Reservoir

Environmental Sciences Europe

Table 3 Quadratic analyses for community parameters regressed with the inundation gradients of the TGR

Dependent variables	Equation	Model summary					Parameter estimates
Dependent variables	Equation	R square	F	df1	df2	P	Constant	b1	b2
Log₁₀ (biomass)	Quadratic	0.224	27.881	2	193	< 0.0001**	2.783	0.459	− 0.135
Height	Quadratic	0.083	8.716	2	193	< 0.0001**	72.277	6.236	− 3.965
Coverage	Quadratic	0.177	20.727	2	193	< 0.0001**	74.708	26.185	− 7.965
Richness	Quadratic	0.033	3.285	2	193	0.040*	3.613	0.713	− 0.222
Shannon	Quadratic	0.021	2.034	2	193	0.134	0.725	0.124	− 0.041
Simpson	Quadratic	0.013	1.261	2	193	0.286	0.382	0.055	− 0.017
Pielou	Quadratic	0.010	0.970	2	193	0.381	0.440	0.052	− 0.016

* indicates quadratic regressions that were significant at P < 0.05; ** indicate quadratic regressions that were significant at P < 0.01