Table 3.

Results of tenfold cross-validation of regression-type and classification-type RF models. Average values of the statistics over all species are shown in the last row. AUC—area under the receiver operating curve, kappa—Cohen’s kappa coefficient.

Species	Regression RF		Classification RF
	AUC	kappa	kappa
C. aspera	0.963	0.529	0.498
C. baltica	0.943	0.274	0.213
C. canescens	0.95	0.36	0.288
C. connivens	0.947	0.275	0.236
T. nidifica	0.894	0.156	0.127
M. spicatum	0.948	0.507	0.469
P. perfoliatus	0.955	0.462	0.424
R. maritima	0.926	0.348	0.309
S. pectinata	0.948	0.645	0.632
Z. palustris	0.901	0.323	0.285
Z. marina	0.943	0.427	0.351
Average	0.938	0.391	0.348