Behavioural responses of pollinators to variation in floral display size and their influences on the evolution of floral traits

Ohashi, Kazuharu; Yahara, Tetsukazu

doi:10.1017/cbo9780511542268.015

Cited by 118 publications

(166 citation statements)

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“…Our results show that S. longicauda plants subjected to pollen limitation develop larger floral displays, which should enhance their attractiveness to pollinators (see Ohashi & Yahara 2001). This benefit was probably weak in our experiment, because moths were so common that all plants received visits during a single night's exposure.…”

Section: Discussionmentioning

confidence: 69%

“…We hypothesize that such adjustment of display size allows plants to benefit from contrasting advantages, depending on pollinator abundance. When pollinators visit infrequently, large displays are advantageous because they attract more pollinators (reviewed by Ohashi & Yahara 2001), which should increase a plant's likelihood of pollen import and export. In contrast, when pollinators visit often, the advantage turns to small displays, because they experience less self-pollination between flowers (geitonogamy: Harder & Barrett 1996;Snow et al 1996), thereby limiting inbreeding in self-compatible species and leaving more pollen on pollinators to be exported to other plants (reviewed by Harder et al 2004).…”

Section: Introductionmentioning

confidence: 99%

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Adaptive plasticity of floral display size in animal-pollinated plants

2005

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Plants need not participate passively in their own mating, despite their immobility and reliance on pollen vectors. Instead, plants may respond to their recent pollination experience by adjusting the number of flowers that they display simultaneously. Such responsiveness could arise from the dependence of floral display size on the longevity of individual flowers, which varies with pollination rate in many plant species. By hand-pollinating some inflorescences, but not others, we demonstrate plasticity in display size of the orchid Satyrium longicauda. Pollination induced flower wilting, but did not affect the opening of new flowers, so that within a few days pollinated inflorescences displayed fewer flowers than unpollinated inflorescences. During subsequent exposure to intensive natural pollination, pollen removal and receipt increased proportionally with increasing display size, whereas pollen-removal failure and self-pollination accelerated. Such benefit-cost relations allow plants that adjust display size in response to the prevailing pollination rate to increase their attractiveness when pollinators are rare (large displays), or to limit mating costs when pollinators are abundant (small displays). Seen from this perspective, pollination-induced flower wilting serves the entire plant by allowing it to display the number of flowers that is appropriate for the current pollination environment.

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Section: Discussionmentioning

confidence: 69%

Section: Introductionmentioning

confidence: 99%

Adaptive plasticity of floral display size in animal-pollinated plants

2005

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“…Additionally, the number of open flowers, or floral display, could also affect the abundance and diversity of species observed in this study (Ohashi & Yahara 2001). Within the studied areas, and excluding some trees species (e.g.…”

Section: Discussionmentioning

confidence: 94%

Bees (Hymenoptera: Apoidea) and flowers in natural forest patches of southern Pantanal

2013

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This is the first systematic survey of bees in the Pantanal wetland, Brazil. We recorded bee species and their floral resources within grassland and natural forest edge habitats in the Pantanal. Surveys were conducted during two to four-days per month, for a total of 12 months. Overall, we recorded 56 bee species visiting a total of 63 flowering plants. Asteraceae and Fabaceae presented the highest number of visited species, however Hyptis suaveolens (Lamiaceae) was the plant most visited by different bee species (18). The most generalist native bee was Trigona fuscipennis visiting a total of 17 flowering plant species. Apis mellifera , an exotic bee, visited 27 species. We also report the overlap (37.5%) in the use of floral resources between the exotic bee Apis mellifera and native bee species. Our updated bee checklist here presented includes 10 new records for the State of Mato Grosso do Sul. These data will support management strategies targeting the conservation of plant-pollinator interactions in the Pantanal ecosystem. Resumo: Esta é a primeira amostragem sistemática de abelhas realizada no Pantanal, Brasil. Nós coletamos espécies de abelhas bem como as plantas que utilizaram como recurso floral em áreas de pastagens naturais e bordas de áreas florestadas. As coletas foram conduzidas durante dois a quatro dias a cada mês, durante 12 meses. Foram registradas 56 espécies de abelhas visitando um total de 63 espécies de plantas. As famílias Asteraceae e Fabaceae apresentaram o maior numero de espécies visitadas, entretanto Hyptis suaveolens (Lamiaceae) foi a espécie visitada pelo maior número de espécies diferentes de abelhas (18). A abelha nativa mais generalista encontrada foi Trigona fuscipennis , que visitou 17 espécies de plantas. Apis mellifera , uma espécie exótica, visitou 27 espécies. Reportamos também a sobreposição (37,5%) no uso de recursos florais entre A. mellifera e espécies de abelhas nativas. A listagem de abelhas aqui apresentada inclui 10 espécies ainda não mencionadas para o estado de Mato Grosso do Sul. Esses dados apoiarão estratégias de manejo focadas na conservação das interações entre plantas e polinizadores no ecossistema Pantanal. Palavras-chave: abelhas, visitantes florais, fragmentos florestais, inventários. 47Bees and flowers of southern Pantanal

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“…[17], [18] and [19] found that the three botanical families with more bee plant species were Asteraceae, Myrtaceae and Fabaceae and [20] mention that the the two most attractive plant families to bees were Asteraceae (which provide pollen and nectar) and Lamiaceae (which provide nectar). Fabaceae is a very large family in tropical and subtropical South American habitats, with 2801 species in Brazil [21] and is very visited by bees, the flowers often shaken to free the pollen out of the porate anthers (buzzing) [22]. Asteraceae totals 2064 species in Brazil [23] and shows a floral display of the open type, much sought after by bees because of the ease to land, the conspicuousness of the flowers in the wild and the arrangement of the inflorescences opening in sequence, offering new supplies every day [24].…”

Section: Resultsmentioning

confidence: 99%