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Light intensity regulates flower visitation in Neotropical nocturnal bees

Liporoni, Rodolfo ; Cordeiro, Guaraci Duran ; Prado, Paulo Inácio ; Schlindwein, Clemens ; Warrant, Eric James LU and Alves-dos-Santos, Isabel (2020) In Scientific Reports 10(1).
Abstract

The foraging activity of diurnal bees often relies on flower availability, light intensity and temperature. We do not know how nocturnal bees, which fly at night and twilight, cope with these factors, especially as light levels vary considerably from night to day and from night to night due to moon phase and cloud cover. Given that bee apposition compound eyes function at their limits in dim light, we expect a strong dependence of foraging activity on light intensity in nocturnal bees. Besides being limited by minimum light levels to forage, nocturnal bees should also avoid foraging at brighter intensities, which bring increased competition with other bees. We investigated how five factors (light intensity, flower availability,... (More)

The foraging activity of diurnal bees often relies on flower availability, light intensity and temperature. We do not know how nocturnal bees, which fly at night and twilight, cope with these factors, especially as light levels vary considerably from night to day and from night to night due to moon phase and cloud cover. Given that bee apposition compound eyes function at their limits in dim light, we expect a strong dependence of foraging activity on light intensity in nocturnal bees. Besides being limited by minimum light levels to forage, nocturnal bees should also avoid foraging at brighter intensities, which bring increased competition with other bees. We investigated how five factors (light intensity, flower availability, temperature, humidity, and wind) affect flower visitation by Neotropical nocturnal bees in cambuci (Campomanesia phaea, Myrtaceae). We counted visits per minute over 30 nights in 33 cambuci trees. Light intensity was the main variable explaining flower visitation of nocturnal bees, which peaked at intermediate light levels occurring 25 min before sunrise. The minimum light intensity threshold to visit flowers was 0.00024 cd/m2. Our results highlight the dependence of these nocturnal insects on adequate light levels to explore resources.

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publishing date
type
Contribution to journal
publication status
published
subject
in
Scientific Reports
volume
10
issue
1
article number
15333
publisher
Nature Publishing Group
external identifiers
  • scopus:85091228340
  • pmid:32948798
ISSN
2045-2322
DOI
10.1038/s41598-020-72047-x
language
English
LU publication?
yes
id
6cd39086-5e88-4d46-87fc-b86f289ff792
date added to LUP
2020-10-22 12:56:27
date last changed
2021-04-13 03:12:08
@article{6cd39086-5e88-4d46-87fc-b86f289ff792,
  abstract     = {<p>The foraging activity of diurnal bees often relies on flower availability, light intensity and temperature. We do not know how nocturnal bees, which fly at night and twilight, cope with these factors, especially as light levels vary considerably from night to day and from night to night due to moon phase and cloud cover. Given that bee apposition compound eyes function at their limits in dim light, we expect a strong dependence of foraging activity on light intensity in nocturnal bees. Besides being limited by minimum light levels to forage, nocturnal bees should also avoid foraging at brighter intensities, which bring increased competition with other bees. We investigated how five factors (light intensity, flower availability, temperature, humidity, and wind) affect flower visitation by Neotropical nocturnal bees in cambuci (Campomanesia phaea, Myrtaceae). We counted visits per minute over 30 nights in 33 cambuci trees. Light intensity was the main variable explaining flower visitation of nocturnal bees, which peaked at intermediate light levels occurring 25 min before sunrise. The minimum light intensity threshold to visit flowers was 0.00024 cd/m<sup>2</sup>. Our results highlight the dependence of these nocturnal insects on adequate light levels to explore resources.</p>},
  author       = {Liporoni, Rodolfo and Cordeiro, Guaraci Duran and Prado, Paulo Inácio and Schlindwein, Clemens and Warrant, Eric James and Alves-dos-Santos, Isabel},
  issn         = {2045-2322},
  language     = {eng},
  number       = {1},
  publisher    = {Nature Publishing Group},
  series       = {Scientific Reports},
  title        = {Light intensity regulates flower visitation in Neotropical nocturnal bees},
  url          = {http://dx.doi.org/10.1038/s41598-020-72047-x},
  doi          = {10.1038/s41598-020-72047-x},
  volume       = {10},
  year         = {2020},
}