Skip to main content

Table 2 Observed frequency of occurrence and mean (±SD) percentage cover and mean (±SD) measured biomass as dry matter of individual plant groups on 405 subplots from 135 study sites (3 subplots per site) and on 135 reference plots. Biomass on a reference plots was calculated as the mean of the three subplots. The total herb layer resents all plants found on a subplot or a reference plot but not all plant groups may be present and the composition may be different; see Tables S6–1 and S6–2 for more details

From: Extending harmonized national forest inventory herb layer vegetation cover observations to derive comprehensive biomass estimates

Plant groupSubplotReference plot
Frequency (N)Cover (%)Biomass (g·m−2)Frequency (N)Cover (%)Biomass (g·m−2)
Small herbs32510.6 ± 12.78.4 ± 12.71267.8 ± 9.17.8 ± 10.3
Tall herbs10116.4 ± 22.725.6 ± 41.95410.3 ± 15.021.6 ± 32.5
Grasses15912.9 ± 18.228.6 ± 57.8879.3 ± 13.621.3 ± 42.9
Sedges1969.4 ± 14.815.6 ± 32.81156.4 ± 10.713.4 ± 21.4
Ferns17418.7 ± 21.423.3 ± 39.21119.9 ± 14.119.3 ± 30.7
Shrubs, incl. Woody parts21824.3 ± 27.162.1 ± 127.211416.0 ± 20.149.5 ± 84.8
Subsample shrubsa, incl. Woody parts6818.5 ± 21.037.0 ± 68.8nanana
Subsample shrubsa, excl. Woody parts11.7 ± 16.4nanana
THL, incl. Woody parts of shrubs40543.3 ± 32.275.3 ± 121.113543.6 ± 31.075.3 ± 106.2
  1. asubsample of subplots with shrub presence where biomass was measured separately for woody and non-woody parts