Consequences of secondary nectar robbing for male components of plant reproduction

Sarah K. Richman, Rebecca E. Irwin, John T. Bosak, Judith L Bronstein

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Premise of the Study: Organisms engage in multiple species interactions simultaneously. While pollination studies generally focus on plants and pollinators exclusively, secondary robbing, a behavior that requires other species (primary robbers) to first create access holes in corollas, is common. It has been shown that secondary robbing can reduce plants' female fitness; however, we lack knowledge about its impact on male plant fitness. Methods: We experimentally simulated primary and secondary robbing in the monocarpic perennial Ipomopsis aggregata (Polemoniaceae), quantifying indirect effects on pollinator-mediated pollen (dye) donation. We also assessed whether continual nectar removal via the floral opening has similar effects on hummingbird-pollinator behavior as continual secondary robbing through robber holes. Key Results: We found no significant indirect effects of secondary robbing on a component of Ipomopsis male fitness. Although robbing did reduce pollen (dye) donation due to avoidance of robbed plants by pollinating hummingbirds, pollen donation did not differ between the two robbing treatments. The effects of secondary robbing on hummingbird behavior resembled effects of chronic nectar removal by pollinators. Our results indicate that hummingbird pollinators may use a combination of cues, including cues given by the presence or absence of nectar, to make foraging decisions. Conclusions: Combined with prior research, this study suggests that secondary robbing is less costly to a component of male fitness than to female fitness in Ipomopsis, broadening our knowledge of the overall costs of mutualism exploitation to total plant fitness.

Original languageEnglish (US)
JournalAmerican Journal of Botany
DOIs
StateAccepted/In press - Jan 1 2018

Fingerprint

nectar robbing
robbing
Plant Nectar
Plant Structures
plant reproduction
nectar
Reproduction
Pollen
pollinator
fitness
pollinators
hummingbirds
Ipomopsis
Cues
Coloring Agents
pollen
Pollination
Symbiosis
dyes
pollination

Keywords

  • Cheating
  • Dye donation
  • Hummingbird pollination
  • Ipomopsis aggregata
  • Male plant fitness
  • Mutualism
  • Nectar robbing

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Genetics
  • Plant Science

Cite this

Consequences of secondary nectar robbing for male components of plant reproduction. / Richman, Sarah K.; Irwin, Rebecca E.; Bosak, John T.; Bronstein, Judith L.

In: American Journal of Botany, 01.01.2018.

Research output: Contribution to journalArticle

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