Metapopulation pollination in the deceptive orchid Anacamptis pyramidalis

Authors

  • Henrik Lind,

  • Markus Franzén,

  • Börge Pettersson†,

  • L. Anders Nilsson


H. Lind, Wallenberg Neuroscience Center, Sölvegatan 17, SE–223 50 Lund, Sweden. – M. Franzén (markus.franzen@zooekol.lu.se), Dept of Animal Ecology, Ecology Building, Sölvegatan 37, SE–223 62 Lund, Sweden. – B. Pettersson and L. A. Nilsson, Dept of Plant Ecology, Evolutionary Biology Centre, Uppsala University, Villavägen 14, SE–752 36 Uppsala, Sweden.

Abstract

Pollen dispersal between local plant populations within a range of 6 km in a geographically defined metapopulation of the lepidopteran-pollinated deceptive orchid Anacamptis pyramidalis was studied on the island Öland in the Baltic Sea. Local A. pyramidalis populations were examined for pollinators, flowering individuals, and fruit set. Population sizes of pollen vector species were estimated using a mark–release–recapture technique. As pollen vectors, the burnet moth Zygaena minos and the butterfly Aporia crataegi dominated. 205 out of 745 marked lepidopterans were pollinarium carriers. The proportion carriers of the total was considerably higher in Z. minos (50.3%), than in A. crataegi (21.5%) and nymphalidae (8.2%). Furthermore, Z. minos moved much shorter distances than A. crataegi did, while no difference in potential pollen dispersal distances were found between males and females. The number of individual vectors recaptured in another local population of A. pyramidalis was low: A. crataegi (8) and Z. minos (1). The ratio of pollinaria transferred to another local A. pyramidalis population compared to pollinaria remaining within the same local population was 1:41. This study highlights that pollen dispersal distances vary between pollen vector species.

Ancillary