title: Trapping efficiency of three carnivorous Pinguicula species.
abstract: In situ trapping efficiencies of Pinguicula alpina L., P. villosa L., and P. vulgaris L. were compared with each other and with those of artificial traps at a subarctic site in northern Sweden. P. vulgaris had the highest trapping efficiency i.e., 21-37 μg prey trapped cm-2day-1and apparently has some means of attracting prey. The other two species trapped about 14-18 μg cm-2day-1, a value similar to that of paper traps mimicing plant leaves. By weight, Nematocera and Collembola were the dominant groups trapped by P. alpina. P. villosa trapped mainly Collembola, while small Nematocera dominated the prey caught by P. vulgaris. Mites (Acarina) were caught in high numbers but contributed only a small part of the total captured biomass owing to their low weight.
authors.affiliation: Abisko Scientific Research Station, S-980 24, Abisko, Sweden.
authors.forename: P S
authors.initials: PS
authors.lastname: Karlsson
authors.affiliation: Department of Ecology, Plant Ecology, University of Lund, Helgonavägen 5, S-223 62, Lund, Sweden.
authors.forename: K O
authors.initials: KO
authors.lastname: Nordell
authors.affiliation: Department of Biology, University of Lund, Helgonavägen 5, S-223 62, Lund, Sweden.
authors.forename: S
authors.initials: S
authors.lastname: Eirefelt
authors.affiliation: Department of Biology, University of Lund, Helgonavägen 5, S-223 62, Lund, Sweden.
authors.forename: A
authors.initials: A
authors.lastname: Svensson
keywords: Carnivorous plants; Nutrient relations; Pinguicula; Trapping efficiency