TABLE 1.

Generalized linear models showing the differences in plant diversity, ANPP and the plant biomass of individual functional groups between grazing intensities and years.

Factors	ANPP		SR		SWD		PE		Poaceae		Cyperaceae		Fabaceae		Asteraceae		Others
	F	P	F	P	F	P	F	P	F	P	F	P	F	P	F	P	F	P
GI	15.53	< 0.001	0.78	0.508	1.76	0.158	2.70	0.049	15.14	< 0.001	14.81	< 0.001	4.64	0.004	4.85	0.003	12.05	< 0.001
Y	11.95	< 0.001	54.93	< 0.001	18.6	< 0.001	9.30	< 0.001	9.65	< 0.001	9.92	< 0.001	2.64	0.076	3.81	0.025	12.69	< 0.001
GI × Y	2.35	0.035	1.89	0.088	2.41	0.031	2.12	0.055	0.82	0.56	1.03	0.41	0.66	0.68	2.27	0.041	1.24	0.29

ANPP, aboveground net primary production; GI, grazing intensity; Y, year; SR, species richness; SWD, Shannon–Wiener diversity index; PE, Pielou’s evenness index.