Spatial distribution of nectar production in a natural Echium vulgare population: Implications for pollinator behaviour

Leiss, Kirsten A.; Klinkhamer, Peter G. L.

doi:10.1016/j.baae.2005.02.006

Cited by 44 publications

(50 citation statements)

References 34 publications

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“…Hence, even if pollinators prefer a specific nectar type, their selective potential on floral nectar of an individual is hampered by the highvariation within individuals. Contrary to general expectation, nectar composition may therefore not be subjected to strong pollinator-mediated selective forces capable of rapidly changing nectar composition (Baker & Baker 1983;Leiss & Klinkhamer 2005;Jacquemyn et al 2012). …”

Section: A R I a T I O N I N N E C T A R C O M P O S I T I O Nmentioning

confidence: 99%

Landscape scale variation in nectar amino acid and sugar composition in a Lepidoptera pollinated orchid species and its relation with fruit set

2013

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Summary1. Understanding landscape scale variation in reproductive and pollination success is a major aim of plant population biology. A potential determinant of reproductive success that has received surprisingly little attention so far is variation in nectar chemical composition across plant individuals and populations. Using the Lepidoptera pollinated fragrant orchid (Gymnadenia conopsea) as a model species, we aimed at providing a first account of landscape scale variation in nectar amino acid and sugar composition, its environmental drivers, and how it may affect plant fruit set. 2. Nectar was sampled from 986 flowers from 296 individuals across eleven discrete populations of the G. conopsea. The proportions of sugars and amino acids were determined using high-performance anion-exchange chromatography. Nectar composition was related to soil characteristics of the populations, and to fruit set, using linear mixed models.3. Approximately, 20% of the variance in nectar traits was situated between populations, whereas the highest proportion of variance (c. 45%) was found among flowers within individuals. Soil carbon and nitrogen content affected both nectar concentration and composition. Furthermore, fruit set of G. conopsea individuals was found to be significantly related to nectar amino acid and sugar composition. 4. Synthesis. These results show that landscape scale variation in nectar amino acid and sugar composition should be taken into account in future studies of plant reproductive success. Furthermore, there is also high within-plant variation in both nectar amino acid and sugar composition. This variation may reduce geitonogamous pollination, but it may also limit rapid pollinator-mediated selection on nectar composition.

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Section: A R I a T I O N I N N E C T A R C O M P O S I T I O Nmentioning

confidence: 99%

Landscape scale variation in nectar amino acid and sugar composition in a Lepidoptera pollinated orchid species and its relation with fruit set

2013

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“…Scale determines how we observe, and it affects our ability to explain and predict ecological patterns and processes (Chave 2013;Levin 1992). Since the distribution of resources and the foraging patterns of consumers can vary with scale, many biotic interactions can be scale-dependent, such as pollination (Leiss & Klinkhamer 2005;Westphal, Steffan-Dewenter, & Tscharntke 2006), herbivory (WallisDeVries, Laca, & Demment 1999), frugivory (Garcia, Zamora, & Amico 2011) and seed predation (Curran and Webb 2000). The problem of the scale at which ecological processes should be considered is critical when we want to produce general predictions (Chave 2013).…”

Section: Introductionmentioning

confidence: 99%

Mixed effects of ant–aphid mutualism on plants across different spatial scales

Zhang

2015

Basic and Applied Ecology

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“…A low number of pollinators associated to nectar production may compromise the reproductive success (Pyke 1991), as observed for A. obovata, which may influence the decision of the pollinator with regard to the choice of flowers or flower groups (Leiss and Klinkhamer 2005).…”

Section: Discussionmentioning

confidence: 99%

Reproductive biology of Amasonia obovata Gleason (Laminaceae)

2014

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Floral mechanisms that ensure seed production via autogamy are more likely to occur in species growing in environments where pollination is scarce. Amasonia obovata was studied in the State of Mato Grosso-Brazil, from 2009, to analyze the morphological and reproductive characteristics, aside from investigating the association of the reproductive success with the pollinator frequency and identity. The flowering and fruiting of A. obovata was concentrated in a period of five months during the rainy season. The dichogamy in flowers of A. obovata is not clearly defined, since the sexual functions were overlapped in the male and female phases. The species is self-compatible and not apomictic. The fruiting percentage obtained by hand self-pollination did not differ from cross-breeding (F = 0.74, P =0.39). In the observations from 2010 to 2012, a hummingbird (Thalurania furcata) legitimate visited 20-100% of the flowers in the male and female phases on different A. obovata plants. Due to the high frequency, this hummingbird was considered the single potential pollinator of the species. These findings show that a limited availability of pollinators may select for floral traits and plant mating strategies that lead to a system of self-fertilization. KEYWORDS: Autogamy, floral morphology, flowering phenology, hummingbird Biologia reprodutiva em Amasonia obovata Gleason (Laminaceae) RESUMOMecanismos florais que garantem produção de sementes via autogamia, são mais prováveis de ocorrer em espécies que crescem em habitats onde a polinização é escassa. Amasonia obovata foi estudada na região sudoeste do estado de Mato Grosso, durante os anos de 2009 a 2012, e o estudo teve por objetivo analisar as características morfológicas, morfométricas e reprodutivas, além de associar o sucesso reprodutivo à frequência de polinizadores. A. obovata concentrou a floração e frutificação em um período de cinco meses, durante a estação chuvosa. A dicogamia em flores de A. obovata não está claramente demarcada, já que as funções sexuais se sobrepõem nas fases masculina e feminina. A espécie é autocompatível e não apomítica. Os valores percentuais de frutificação obtidos na autopolinização manual não diferiram dos valores obtidos na polinização cruzada (F= 0,74; P=0,39). Em observações realizadas nos anos de 2010 a 2012, o beija-flor (Thalurania furcata) realizou de 20 a 100% de visitas legítimas às flores nas fases masculina e feminina, de diferentes indivíduos de A. obovata e, devido à sua frequência, foi considerado o potencial polinizador da espécie. Os resultados mostram que a limitada disponibilidade de polinizadores pode selecionar plantas de características florais e estratégias de reprodução que levam a um sistema reprodutivo autogâmico.

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Spatial distribution of nectar production in a natural Echium vulgare population: Implications for pollinator behaviour

Cited by 44 publications

References 34 publications

Landscape scale variation in nectar amino acid and sugar composition in a Lepidoptera pollinated orchid species and its relation with fruit set

Landscape scale variation in nectar amino acid and sugar composition in a Lepidoptera pollinated orchid species and its relation with fruit set

Mixed effects of ant–aphid mutualism on plants across different spatial scales

Reproductive biology of Amasonia obovata Gleason (Laminaceae)

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