Precisamos falar sobre o uso impróprio de recursos florais

Freitas, Leandro

doi:10.1590/2175-7860201869446

Cited by 8 publications

(3 citation statements)

References 20 publications

(32 reference statements)

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“…Images and videos were captured during the visits to evaluate the foraging behavior and the floral resources obtained. The visits were identified as legitimate or illegitimate by the expected mode of pollination, considering the shape and arrangement of the flower parts (sensu Irwin et al, 2010;Freitas, 2018). Specimens of insects were collected for posterior identification.…”

Section: Frequency and Efficacy Of Floral Visitorsmentioning

confidence: 99%

Temporal changes in the most effective pollinator of a bromeliad pollinated by bees and hummingbirds

Leal

Moreira

Pinto

et al. 2020

PeerJ

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A generalist pollination system may be characterized through the interaction of a plant species with two or more functional groups of pollinators. The spatiotemporal variation of the most effective pollinator is the factor most frequently advocated to explain the emergence and maintenance of generalist pollination systems. There are few studies merging variation in floral visitor assemblages and the efficacy of pollination by different functional groups. Thus, there are gaps in our knowledge about the variation in time of pollinator efficacy and frequency of generalist species. In this study, we evaluated the pollination efficacy of the floral visitors of Edmundoa lindenii (Bromeliaceae) and their frequency of visits across four reproductive events. We analyzed the frequency of the three groups of floral visitors (large bees, small bees, and hummingbirds) through focal observations in the reproductive events of 2015, 2016, 2017, and 2018. We evaluated the pollination efficacy (fecundity after one visit) through selective exposure treatments and the breeding system by manual pollinations. We tested if the reproductive success after natural pollination varied between the reproductive events and also calculated the pollen limitation index. E. lindenii is a self-incompatible and parthenocarpic species, requiring the action of pollinators for sexual reproduction. Hummingbirds had higher efficacy than large bees and small bees acted only as pollen larcenists. The relative frequency of the groups of floral visitors varied between the reproductive events. Pollen limitation has occurred only in the reproductive event of 2017, when visits by hummingbirds were scarce and reproductive success after natural pollination was the lowest. We conclude that hummingbirds and large bees were the main and the secondary pollinators of E. lindenii, respectively, and that temporal variations in the pollinator assemblages had effects on its reproductive success. Despite their lower pollination efficacy, large bees ensured seed set when hummingbirds failed. Thus, we provide evidence that variable pollination environments may favor generalization, even under differential effectiveness of pollinator groups if secondary pollinators provide reproductive assurance.

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Section: Frequency and Efficacy Of Floral Visitorsmentioning

confidence: 99%

Temporal changes in the most effective pollinator of a bromeliad pollinated by bees and hummingbirds

Leal

Moreira

Pinto

et al. 2020

PeerJ

Self Cite

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show abstract

“…Based on these behaviour patterns, it was possible to classify Drosophila sp. and S. oreala as nectar thieving, since they used the flowers without necessarily transferring pollen to other plants and without causing damage to floral structures (Inouye 1980;Freitas 2018). The Curculionidae beetles, which caused damage to the floral structures in search of pollen, can be considered as pollen robbers.…”

Section: Floral Visitorsmentioning

confidence: 99%

Reproductive biology and flower-visitor interactions of two bromeliad species from the Brazilian Atlantic Forest

Silva¹,

Barbosa²,

Faria³

2022

plecevo

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Background and aims – The Bromeliaceae family has great importance in the maintenance of neotropical communities. In the Brazilian Atlantic Forest, bromeliads are among the major groups responsible for maintaining the local flora and fauna and participate in important ecological interactions with insects, anurans, and hummingbirds. This work reports on aspects of the reproductive biology and the interactions between two endemic bromeliad species from the Atlantic Forest (Aechmea bruggeri and Quesnelia indecora) and their floral visitors to assess the impact of these relationships on the reproductive success and conservation of these plants.Material and methods – Reproductive phenology, floral biology, pollination experiments, and the reproductive success of both species were investigated. To determine the floral visitors, we made direct observations on flowers and collected floral visitors that could not be identified in the field.Key results – Aechmea bruggeri and Quesnelia indecora presented the individual and population flowering phenological pattern classified as annual with intermediate duration. The species are partially and totally self-incompatible, respectively. Both species presented a varied visitation guild, and although Q. indecora presented flowers with ornitofilous characteristics, no hummingbirds were recorded for this species. The hummingbird Thalurania glaucopis was the main visitor for Aechmea bruggeri and the bee Trigona cf. braueri was the main visitor for Quesnelia indecora. Nectar thieving by lepidopterans was observed for both species. Pollen robbing by beetles and nectar robbing by bees were registered for Aechmea bruggeri and Quesnelia indecora, respectively. Fruit and seed set of both species were highly affected by herbivory, which may negatively affect their reproductive success.Conclusion – Our work highlights the important role of bromeliads in neotropical communities, showing how floral visitors and plants interact by participating in maintaining biological diversity in the studied forest remnant.

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“…We performed focal observations (sensu Dafni et al, 2005) Irwin et al, 2010;Freitas, 2018). Specimens of insects were collected for posterior identification.…”

Section: Frequency and Efficacy Of Floral Visitorsmentioning

confidence: 99%

Peer Review #2 of "Temporal changes in the most effective pollinator of a bromeliad pollinated by bees and hummingbirds (v0.2)"

Ordano¹

2020

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Background A generalist pollination system may be characterized through the interaction of a plant species with two or more functional groups of pollinators. The spatiotemporal variation of the most effective pollinator is the factor most frequently advocated to explain the emergence and maintenance of generalist pollination systems. There are few studies merging variation in floral visitor assemblages and the efficacy of pollination by different functional groups. Thus, there are gaps in our knowledge about the variation in time of pollinator efficacy and frequency of generalist species. In this study, we evaluated the pollination efficacy of the floral visitors of Edmundoa lindenii (Bromeliaceae) and their frequency of visits across four reproductive events. Methods We analysed the frequency of the three groups of floral visitors (large bees, small bees, and hummingbirds) through focal observations in the reproductive events

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Precisamos falar sobre o uso impróprio de recursos florais

Cited by 8 publications

References 20 publications

Temporal changes in the most effective pollinator of a bromeliad pollinated by bees and hummingbirds

Temporal changes in the most effective pollinator of a bromeliad pollinated by bees and hummingbirds

Reproductive biology and flower-visitor interactions of two bromeliad species from the Brazilian Atlantic Forest

Peer Review #2 of "Temporal changes in the most effective pollinator of a bromeliad pollinated by bees and hummingbirds (v0.2)"

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