Functional Groups Dominate Aboveground Net Primary Production under Long-Term Nutrient Additions in a Tibetan Alpine Meadow.

We found a highly significant effect of year on the aboveground biomass ( p < 0.001), which may be related to differences in temperature and precipitation among the years.

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In this study, N addition had a marginally significant effect on evenness ( Figure 2 D, Table 1 ), suggesting that the decline in dominant species may be greater than that of subordinate species, indirectly leading to an increase in species evenness.

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