Skip to main content
. 2015 Aug 18;10(8):e0135173. doi: 10.1371/journal.pone.0135173

Fig 3. Multiple comparisons of the mean values of above- and below-ground net primary productivity (ANPP and BNPP).

Fig 3

A two-way analysis of ANOVA with Turkey’s test was applied to free grazed (FG) and grazed excluded (GE) sites, to determine if ANPP (or BNPP) is significantly different among the three zonal alpine grassland types (AGTs) on the Northern Tibetan Plateau, AM = alpine meadow; AS = alpine steppe; ADS = alpine desert-steppe. Different letters indicate statistically significant differences at P < 0.05. Paired samples t-tests were conducted to determine if grazing exclusion altered the ANPP and BNPP relative to the adjacent open pastures under livestock grazing. ** and * indicate significant differences at P < 0.01 and P < 0.05, respectively. The ns means no significance in statistics.