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Table 1 Lists of species that were among the five most dominant at Gibbons Creek Barrens, Pope County, Illinois, USA, based on percent importance value (% IV = sum of relative cover and relative frequency) during each of nine years of vegetation monitoring (from 1989 to 2017) in the fire treatment unit. Percent IV shown in bold are values ranking among the top five for a given year. Species shown in bold were the most dominant during at least one year

From: Do early trends in oak barrens fire treatment predict later outcomes? Insights from three decades of vegetation monitoring

  Yearly importance value (%)  
Species 1989 1990 1991 1993 1994 1995 2006 2013 2017 Years in top five IV (n)
Acalypha gracilens Gray 2.31 2.53 0.97 0.74 4.08 2.14 2.97 2.03 1.27 1
Amphicarpaea bracteata 1.12 1.52 2.26 2.86 3.86 3.09 3.39 0.39 0.78 1
Carex albicans 7.52 9.49 9.17 8.68 9.22 9.23 8.11 12.57 7.91 9
Danthonia spicata 6.77 4.08 7.24 10.71 5.31 7.94 5.24 9.61 6.72 8
Dichanthelium laxiflorum 4.08 5.12 11.96 13.35 9.72 10.79 6.62 5.56 7.08 8
Dichanthelium linearifolium 2.07 2.28 3.31 3.23 2.30 2.50 1.79 6.51 2.51 1
Helianthus divaricatus 8.92 8.12 8.42 8.01 8.95 10.11 14.03 10.90 5.85 8
Parthenocissus quinquefolia 9.74 4.08 3.70 3.94 3.24 2.42 2.70 1.95 2.73 1
Potentilla simplex 1.41 1.25 1.86 0.80 0.70 0.78 1.89 1.14 8.64 1
Schizachyrium scoparium 11.26 6.11 4.85 5.03 4.08 3.05 4.00 5.38 6.07 6
Triodanis perfoliata L. Nieuwl. 0.26 11.05 0.00 0.00 2.63 1.76 1.52 0.84 0.04 1
Sum of importance values (%) 55.47 55.63 53.75 57.36 54.09 53.80 52.26 56.89 49.59