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. 2017 May 26;12(5):e0178440. doi: 10.1371/journal.pone.0178440

Fig 1. Total flowering potential for prairie ecoregions.

Fig 1

Mean (± SE) total flowering potential (FP), or the relative cover of species expected to flower in each month, in tall- (top), mixed- (middle), and short-grass (bottom) prairies. FP values for the entire year illustrate the total community flowering volume (area under the curve); the shaded ecoregion indicates the growing season in the U.S. central plains. Treatments without added nitrogen (N) include the control, phosphorus (P), potassium + micronutrients (K+μ), and PK+μ, and those with added N include N, NP, NK+μ, and NPK+μ. Asterisks indicate values that were determined to be statistically distinct following Bonferroni correction (*** p < 0.001, ** p < 0.01, *p < 0.05).