Table 6. The quadratic regression parameters of Normalized zooplankton biomass size spectra for the three types of lakes.

	Parameter a		Parameter b		Parameter c		R2	n
Type	Mean	Range	Mean	Range	Mean	Range	Mean
1	2.85a	(1.31-4.92)	0.26a	(-0.72-0.99)	- 2.27a	(-3.87--0.57)	0.94	31
2	2.45a	(1.85-3.88)	0.83b	(0.16-1.17)	- 2.88b	(-5.0--1.92)	0.97	16
3	5.27b	(2.04-7.23)	0.54b	(-0.21-0.96)	- 3.48b	(-5.12--1.57)	0.94	27

A parabolic equation is y=a + 0.5c(x- b)², where c is the curvature of the parabola and a and b are the y and x-coordinates of the vertex. Values with different letters indicate significant differences between the three types of lakes (p<0.05).