Above ground biomass When aboveground biomass was analyzed across all years, "year" was highly significant for all plant functional groups (Table 1 ), and there was a significant interaction between the exclosure and warming treatments for B. nana stems.
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Interactions between herbivory and warming in aboveground biomass production of arctic vegetation.
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There was a marginally significant secondary (δ p ) effect of the exclosure treatment for B. nana leaves, while graminoids showed a significant primary (δ p ) response to the exclosure treatment (Table 2 ) (see Methods for definitions of the terms "secondary" and "primary" in relation to plant biomass dynamics).