Table 6.

Variable loadings on principal components

	PC1	PC2	PC3	PC4	PC5	PC6
Nymphoides peltata	− 0.111	0.1356	0.169	− 0.0579	− 0.6289	− 0.1032
Nuphar lutea	− 0.3058	0.4991	− 0.2301	0.6623	− 0.0283	− 0.0354
Lemna minor	− 0.0818	0.161	0.0095	0.2666	0.0416	− 0.1168
Potamogeton nodosus	− 0.2145	− 0.0345	0.063	− 0.2067	− 0.3276	0.2175
Hydrocharis morsus-ranae	− 0.2396	− 0.2134	− 0.2546	− 0.1065	− 0.0734	0.5461
Sparganium emersum	− 0.0794	0.0776	− 0.5234	− 0.2998	0.0249	− 0.3356
Sparganium erectum	− 0.0794	0.0776	− 0.5234	− 0.2998	0.0249	− 0.3356
Trapa natans	− 0.603	− 0.4113	0.2817	0.0578	− 0.0973	− 0.5019
Ceratophyllum demersum	− 0.0848	0.1334	− 0.0439	0.008	0.1079	0.1239
Juncus bufonius	− 0.0287	0.0257	− 0.0341	− 0.0709	0.0184	− 0.0197
Iris pseudacorus	− 0.2817	0.551	0.4292	− 0.4538	0.4063	− 0.0016
Salvinia natans	− 0.4943	− 0.2702	− 0.1462	0.0863	0.3995	0.2605
Butomus umbellatus	− 0.2759	0.2891	− 0.1174	− 0.1767	− 0.3766	0.261

Negative numbers represent lower values in the raw data, thus, they indicate that anglers are more likely to name or recognize the species