Pollination by nectar-foraging thynnine wasps: Evidence of a new specialized pollination system for Australian orchids

Noushka Reiter, Björn Bohman, Gavin R. Flematti, Ryan D. Phillips

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Specialized pollination systems can contribute to plant diversification and species co-existence, but they also have important implications for plant conservation due to the potential risks of relying on a small number of pollinator species. Here, we studied pollination of Caladenia colorata (Orchidaceae), a rare species with floral traits intermediate between those that characterize Caladenia spp. pollinated by food foraging insects and those pollinated by sexual deception of thynnine wasps. We aimed to determine which species are floral visitors, how many species are involved in pollination and what is the pollination strategy. Using multiple potted plants as bait flowers, we found that thynnine wasps were the main insect group attracted, but only a single species exhibited the necessary size and behaviour to achieve pollination. Caladenia colorata produced meagre quantities of sucrose on the surface of the labellum on which the wasps appeared to feed. For the first time, we demonstrate pollination by food foraging thynnine wasps in Caladenia, meaning that transitions between this strategy and sexual deception could occur without a shift in pollinator group. Despite relying primarily on a single pollinator species, the pollination rate was comparable with other nectar-producing orchids. However, the specialization in this system means that the distribution of the pollinator needs to be taken into account prior to conservation translocations.

Original languageEnglish
Pages (from-to)327-337
Number of pages11
JournalBotanical Journal of the Linnean Society
Volume188
Issue number3
DOIs
Publication statusPublished - 8 Nov 2018

Fingerprint

nectar
wasp
Orchidaceae
pollination
Caladenia
foraging
pollinator
pollinators
insect
floral trait
conservation plants
insects
food
container-grown plants
bait
rare species
sucrose
baits
translocation
coexistence

Cite this

@article{f6f7239a808f41e88785f4624875daa7,
title = "Pollination by nectar-foraging thynnine wasps: Evidence of a new specialized pollination system for Australian orchids",
abstract = "Specialized pollination systems can contribute to plant diversification and species co-existence, but they also have important implications for plant conservation due to the potential risks of relying on a small number of pollinator species. Here, we studied pollination of Caladenia colorata (Orchidaceae), a rare species with floral traits intermediate between those that characterize Caladenia spp. pollinated by food foraging insects and those pollinated by sexual deception of thynnine wasps. We aimed to determine which species are floral visitors, how many species are involved in pollination and what is the pollination strategy. Using multiple potted plants as bait flowers, we found that thynnine wasps were the main insect group attracted, but only a single species exhibited the necessary size and behaviour to achieve pollination. Caladenia colorata produced meagre quantities of sucrose on the surface of the labellum on which the wasps appeared to feed. For the first time, we demonstrate pollination by food foraging thynnine wasps in Caladenia, meaning that transitions between this strategy and sexual deception could occur without a shift in pollinator group. Despite relying primarily on a single pollinator species, the pollination rate was comparable with other nectar-producing orchids. However, the specialization in this system means that the distribution of the pollinator needs to be taken into account prior to conservation translocations.",
keywords = "Caladenia, Conservation, Nectar, Orchid, Pollination, Pollinator baiting, Specialization, Sucrose",
author = "Noushka Reiter and Bj{\"o}rn Bohman and Flematti, {Gavin R.} and Phillips, {Ryan D.}",
year = "2018",
month = "11",
day = "8",
doi = "10.1093/botlinnean/boy058",
language = "English",
volume = "188",
pages = "327--337",
journal = "Botanical Journal of the Linnean Society",
issn = "0024-4074",
publisher = "OXFORD UNIV PRESS UNITED KINGDOM",
number = "3",

}

Pollination by nectar-foraging thynnine wasps : Evidence of a new specialized pollination system for Australian orchids. / Reiter, Noushka; Bohman, Björn; Flematti, Gavin R.; Phillips, Ryan D.

In: Botanical Journal of the Linnean Society, Vol. 188, No. 3, 08.11.2018, p. 327-337.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Pollination by nectar-foraging thynnine wasps

T2 - Evidence of a new specialized pollination system for Australian orchids

AU - Reiter, Noushka

AU - Bohman, Björn

AU - Flematti, Gavin R.

AU - Phillips, Ryan D.

PY - 2018/11/8

Y1 - 2018/11/8

N2 - Specialized pollination systems can contribute to plant diversification and species co-existence, but they also have important implications for plant conservation due to the potential risks of relying on a small number of pollinator species. Here, we studied pollination of Caladenia colorata (Orchidaceae), a rare species with floral traits intermediate between those that characterize Caladenia spp. pollinated by food foraging insects and those pollinated by sexual deception of thynnine wasps. We aimed to determine which species are floral visitors, how many species are involved in pollination and what is the pollination strategy. Using multiple potted plants as bait flowers, we found that thynnine wasps were the main insect group attracted, but only a single species exhibited the necessary size and behaviour to achieve pollination. Caladenia colorata produced meagre quantities of sucrose on the surface of the labellum on which the wasps appeared to feed. For the first time, we demonstrate pollination by food foraging thynnine wasps in Caladenia, meaning that transitions between this strategy and sexual deception could occur without a shift in pollinator group. Despite relying primarily on a single pollinator species, the pollination rate was comparable with other nectar-producing orchids. However, the specialization in this system means that the distribution of the pollinator needs to be taken into account prior to conservation translocations.

AB - Specialized pollination systems can contribute to plant diversification and species co-existence, but they also have important implications for plant conservation due to the potential risks of relying on a small number of pollinator species. Here, we studied pollination of Caladenia colorata (Orchidaceae), a rare species with floral traits intermediate between those that characterize Caladenia spp. pollinated by food foraging insects and those pollinated by sexual deception of thynnine wasps. We aimed to determine which species are floral visitors, how many species are involved in pollination and what is the pollination strategy. Using multiple potted plants as bait flowers, we found that thynnine wasps were the main insect group attracted, but only a single species exhibited the necessary size and behaviour to achieve pollination. Caladenia colorata produced meagre quantities of sucrose on the surface of the labellum on which the wasps appeared to feed. For the first time, we demonstrate pollination by food foraging thynnine wasps in Caladenia, meaning that transitions between this strategy and sexual deception could occur without a shift in pollinator group. Despite relying primarily on a single pollinator species, the pollination rate was comparable with other nectar-producing orchids. However, the specialization in this system means that the distribution of the pollinator needs to be taken into account prior to conservation translocations.

KW - Caladenia

KW - Conservation

KW - Nectar

KW - Orchid

KW - Pollination

KW - Pollinator baiting

KW - Specialization

KW - Sucrose

UR - http://www.scopus.com/inward/record.url?scp=85054522572&partnerID=8YFLogxK

U2 - 10.1093/botlinnean/boy058

DO - 10.1093/botlinnean/boy058

M3 - Article

VL - 188

SP - 327

EP - 337

JO - Botanical Journal of the Linnean Society

JF - Botanical Journal of the Linnean Society

SN - 0024-4074

IS - 3

ER -