Pollination by multiple species of nectar foraging Hymenoptera in Prasophyllum innubum, a critically endangered orchid of the Australian Alps

Author:

Hayashi Tobias,Ayre Bronwyn M.ORCID,Bohman Björn,Brown Graham R.,Reiter NoushkaORCID,Phillips Ryan D.ORCID

Abstract

Context Australia has numerous threatened species of terrestrial orchid, with a particularly high incidence of rarity in the genus Prasophyllum R.Br. Although there has been research on mycorrhizal associations and propagation, little is known about the reproductive ecology of threatened Prasophyllum. Understanding which animals are responsible for pollination and the impact of herbivores on reproduction may inform conservation actions. Aims For the nationally Critically Endangered Prasophyllum innubum, we aimed to determine the pollinator species, test for self-pollination, quantify levels of reproductive success and herbivory, and identify herbivores. Methods Pollinator observations were undertaken at wild populations of P. innubum, whereas an experiment testing for self-pollination was undertaken in shadehouse conditions. We quantified reproductive success and herbivory at two populations and attempted to identify herbivores using game cameras. Key results Pollination occurred via three species of bee and a sphecid wasp, all of which attempted feeding on floral nectar. Fruit set averaged 72–84% at wild sites, whereas only 6% of flowers set fruit via self-pollination when insects were excluded. Just 4% of inflorescences were completely consumed by herbivores, and no herbivory was captured on camera. Conclusions P. innubum has a generalist rewarding pollination system that confers high levels of reproductive success, with herbivory having little impact on reproduction. Implications Pollinator availability is unlikely to restrict conservation translocation site selection of P. innubum because of a generalist pollination system. If herbivores are a threat for this species, it is likely to be through alteration of habitat rather than direct grazing.

Funder

Wildlife and Habitat Bushfire Recovery Program

Publisher

CSIRO Publishing

Reference69 articles.

1. Short- and long-term limitations to fruit production in a tropical orchid.;Ecology,1990

2. Beyond the various contrivances by which orchids are pollinated: global patterns in orchid pollination biology.;Botanical Journal of the Linnean Society,2023

3. Pollination of the Lady’s slipper orchid () in Scandinavia – taxonomic and conservational aspects.;Nordic Journal of Botany,2009

4. Atlas of Living Australia (2023) Atlas of Living Australia – species: . Available at

5. Australian Government (2023) Species Profile and Threats Database – EPBC Act List of Threatened Flora. Available at

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