The relative importance of diurnal and nocturnal pollinators of <i>Platanthera hologlottis</i> Maxim. (Orchidaceae)

Hattori, Mitsuru; Tamada, Yoko; Itino, Takao

doi:10.1080/17429145.2020.1754476

Cited by 6 publications

(4 citation statements)

References 30 publications

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“…We generate a proof of concept that flower visits on camera can predict the frequency and pattern of seed set (see also [ 32 ]), which is a major component of seed yield [ 30 ]. Furthermore, T. pratense does not set seed without pollen transfer by insects and is one of the most valuable forage legumes worldwide in terms of seed production [ 20 ].…”

Section: Discussionmentioning

confidence: 99%

“…Pollen microscopy and DNA metabarcoding reveal the types of pollen carried by nocturnal insects [ 14 , 16 , 25 ], while exclusion experiments establish which agricultural plants depend on nocturnal pollination [ 13 ]. However, the scale of nocturnal pollination has proven particularly difficult to quantify [ 17 ], and cameras can provide robust estimates of relative visitation by day- and night-active pollinators [ 32 ]. This highlights not only which pollinators contribute to plant reproduction, but which floral resources sustain insect populations.…”

Section: Discussionmentioning

confidence: 99%

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Moths complement bumblebee pollination of red clover: a case for day-and-night insect surveillance

et al. 2022

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Recent decades have seen a surge in awareness about insect pollinator declines. Social bees receive the most attention, but most flower-visiting species are lesser known, non-bee insects. Nocturnal flower visitors, e.g. moths, are especially difficult to observe and largely ignored in pollination studies. Clearly, achieving balanced monitoring of all pollinator taxa represents a major scientific challenge. Here, we use time-lapse cameras for season-wide, day-and-night pollinator surveillance of Trifolium pratense (L.; red clover) in an alpine grassland. We reveal the first evidence to suggest that moths, mainly Noctua pronuba (L.; large yellow underwing), pollinate this important wildflower and forage crop, providing 34% of visits (bumblebees: 61%). This is a remarkable finding; moths have received no recognition throughout a century of T. pratense pollinator research. We conclude that despite a non-negligible frequency and duration of nocturnal flower visits, nocturnal pollinators of T. pratense have been systematically overlooked. We further show how the relationship between visitation and seed set may only become clear after accounting for moth visits. As such, population trends in moths, as well as bees, could profoundly affect T. pratense seed yield. Ultimately, camera surveillance gives fair representation to non-bee pollinators and lays a foundation for automated monitoring of species interactions in future.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Moths complement bumblebee pollination of red clover: a case for day-and-night insect surveillance

et al. 2022

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“…Cylindrical inflorescence would prove enlightening. Particularly, pollinator exclusion experiments could be used to directly measure the relative contributions of nocturnal versus diurnal visitors to reproduction (e.g., see studies by Doubleday & Eckert, 2018; Funamoto & Ohashi, 2017; Hattori et al, 2020). Furthermore, a more focused and exhaustive sampling of floral visitors would provide a better estimate of the diversity and consistency of potential pollinators than the limited number of moths caught in the current study.…”

Section: Discussionmentioning

confidence: 99%

Impact of reserve area on reproduction of a moth‐pollinated Stackhousia Sm. (Celastraceae) species in a fragmented landscape

Blackall,

Mackay,

Whalen

2023

Austral Ecology

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Landscape disturbance frequently results in reduced pollination and reproduction of animal‐pollinated plants. However, few studies globally, and no studies in Australia, have focused on the impact(s) on plants with nocturnal moth pollinators. This study measured natural levels of reproduction of the common, nocturnally moth‐pollinated plant Stackhousia aspericocca Schuch. ssp. Cylindrical inflorescence (W.R.Barker 1418) (Celastraceae) across a range of reserves of varying sizes within a fragmented landscape of southern Australia. We hypothesized that plant reproduction would show a positive relationship with reserve area. Nocturnal pollinator surveys confirmed that night‐flying settling moths of the families Geometridae and Noctuidae visited flowers of S. aspericocca ssp. Cylindrical inflorescence in the study region, and 8 out of 16 captured, flower‐visiting moths carried more than 100 pollen grains of the study species (overall mean ± SD: 616.69 ± 1155.70). Two individuals of the common geometrid moth Oenochroma vinaria each carried over 3000 pollen grains. Thus, visiting moths may remove and carry large amounts of pollen. In contrast to our initial hypothesis, however, plant reproduction, measured as proportional fruit‐set and mean seed number per fruit, showed no relation to reserve area across two consecutive years, and mean levels of plant reproduction were spatially similar throughout the fragmented landscape of the study region. It is hypothesized that the reproductive resilience of S. aspericocca ssp. Cylindrical inflorescence in the study region is due to effective pollination by common, night‐flying moths, which may utilize both the reserves and their surrounding matrix to complete their life cycle(s).

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“…may be inflated. For instance, Hattori et al (2020) photographed floral visitors and then inferred fertilization rates from pollinia removal and capsule development among non-bagged and bagged-plants, but this is not a direct link to a specific pollinator and its efficacy in pollination or fertilization (or even abiotic factors). The current bottlenecks for Platanthera spp.…”

Section: Pollinator Versus Visitormentioning

confidence: 99%

We know very little about pollination in the Platanthera Rich (Orchidaceae: Orchidoideae)

Janes,

van der Voort,

Huber

2024

Ecology and Evolution

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The Platanthera Rich. (Orchidoideae) comprise a speciose genus of orchids primarily in the northern hemisphere, with up to 200 known species worldwide. Individual species are known to self‐pollinate, but many rely on insect pollinators with characteristics such as floral color, timing of floral odor emissions, nectar rewards, and spur length associated with particular pollination syndromes. As with many orchids, some orchid–pollinator associations are likely highly co‐evolved, but we also know that some Platanthera spp. are the result of hybridization events, which implies a lack of pollinator fidelity in some cases. Some Platanthera spp. occur in large numbers which, coupled with the numerous Platanthera–pollinator systems, make them accessible as study species and useful for co‐evolutionary studies. Due to the likely effects of climate change and ongoing development on Platanthera spp. habitats, these orchids and their associated pollinators should be a focus of conservation attention and management. However, while there is a fairly substantial literature coverage of Platanthera–pollinator occurrence and interactions, there are still wide gaps in our understanding of the species involved in these systems. In this systematic review, we outline what is current knowledge and provide guidance on further research that will increase our understanding of orchid–insect co‐evolutionary relationships. Our review covers 157 orchid species and about 233 pollinator species interacting with 30 Platanthera spp. We provide analyses on aspects of these interactions such as flower morphology, known insect partners of Platanthera species, insect‐Platanthera specificity, pollination visitor timing (diurnal vs. nocturnal), floral rewards, and insect behavior affecting pollination outcomes (e.g., pollinia placement). A substantial number of Platanthera spp. and at least a few of their known pollinators are of official (IUCN) conservation concern – and many of their pollinators remain unassessed or even currently unknown – which adds to the urgency of further research on these co‐evolved relationships.

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The relative importance of diurnal and nocturnal pollinators of Platanthera hologlottis Maxim. (Orchidaceae)

Cited by 6 publications

References 30 publications

Moths complement bumblebee pollination of red clover: a case for day-and-night insect surveillance

Moths complement bumblebee pollination of red clover: a case for day-and-night insect surveillance

Impact of reserve area on reproduction of a moth‐pollinated Stackhousia Sm. (Celastraceae) species in a fragmented landscape

We know very little about pollination in the Platanthera Rich (Orchidaceae: Orchidoideae)

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