Journal
AMERICAN JOURNAL OF BOTANY
Volume 96, Issue 4, Pages 809-815Publisher
WILEY
DOI: 10.3732/ajb.0800317
Keywords
Bombus vagans; bumble bee; competition for pollination; interspecific pollen transfers; Mimulus ringens; monkey flower; Phrymaceae; pollen loss; pollination; seed set
Categories
Funding
- Applied Ecological Services
- National Science Foundation [DEB 9816712, DEB 9903308]
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Movement of pollinators between coflowering plant species may influence conspecific pollen deposition and seed set. Interspecific pollinator movements between native and showy invasive plants may be Particularly detrimental to the pollination and reproductive Success of native species. We explored the effects of invasive Lythrum salicaria on the reproductive success of Mimulus ringens, a wetland plant native to eastern North America. Pollinator flights between these species significantly reduced the amount of conspecific pollen deposited on Mimulus stigmas and the number of seeds in Mimulus fruits, suggesting that pollen loss is,in important mechanism of: competition for pollination, Although pollen loss is often attributed to pollen wastage on heterospecific floral structures, Our novel findings suggest that grooming by bees as they forage on a competitor may also significantly reduce outcross pollen export and seed set in Mimulus ringens.
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