Skip to main content

Advertisement

Table 1 Imaging spectroscopy models predicting fresh weight of plant biomass and plant nitrogen content

From: Foraging ecology of three sympatric ungulate species – Behavioural and resource maps indicate differences between chamois, ibex and red deer

   Biomass (g.m −2 ) Nitrogen (%)
2010 Theil’s U 0.19 0.11
  adj. R2 0.65 0.53
  RMSE 174.37 0.53
  < 20 % RMSE (%) 44.19 62.79
2011 Theil’s U 0.15 0.07
  adj. R2 0.70 0.43
  RSME 155.71 0.28
  < 20 % RMSE (%) 53.57 88.80
2012 Theil’s U 0.23 0.07
  adj. R2 0.49 0.39
  RSME 174.35 0.26
  < 20 % RMSE (%) 36.44 84.48
2013 Theil’s U 0.22 0.08
  adj. R2 0.43 0.36
  RSME 241.30 0.27
  < 20 % RMSE (%) 36.93 81.67
  1. Models were generated separately for each year using data from the imaging spectrometer APEX and in situ vegetation data. Model performance is described using Theil’s uncertainty coefficient (Theil’s U), adjusted Pearson’s correlation coefficient (adj. R2), root mean squared error of prediction (RMSE) and % of predicted values below 20 % RMSE (< 20 % RMSE (%)).