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Pollinator-mediated Impacts of the Invasive Plant Species Lythrum Salicaria on the Native Decodon Verticillatus
| Content Provider | Semantic Scholar |
|---|---|
| Author | Slater, Gary W. Silva, Elizabeth Meyer Da |
| Copyright Year | 2011 |
| Abstract | Plant-pollinator interactions in invaded communities can range from facilitative to competitive, with the latter being most commonly observed. If invasive species can successfully integrate into native plant-pollinator networks and change pollinator foraging patterns, native plant fitness in these communities could be altered. Here I examine the impact of the showy flowering invasive plant, purple loosestrife (Lythrum salicaria), on a co-flowering close relative, swamp loosestrife (Decodon verticillatus). Both species are in the family Lythraceae, share a number of floral traits, and tend to be visited by the same pollinator community. A pollen limitation experiment was conducted in invaded and uninvaded populations of D. verticillatus on Lake Opinicon, Ontario, to determine if the presence of the L. salicaria altered pollinator driven reproductive success in D. verticillatus. These experiments demonstrated that invaded communities suffer less pollen limitation than uninvaded communities, suggesting that there could be a positive impact of invasion on this particular measure of plant fitness. Complementary pollinator observations conducted at the same sites determined that the facilitative effect was not due to increased pollinator visitation to D. verticillatus, but rather suggest that there are differences in pollinator foraging patterns on inflorescences in invaded and uninvaded sites. While greenhouse experiments revealed a negative impact of L. salicaria pollen deposition on seed set in D. verticillatus, our field experiments suggest that invasive pollen transfer to natives in situ is not great enough to significantly mitigate the facilitate effects of an invasion on seed set. This work provides a unique contribution to the field of pollination biology as well as our understanding of the impacts of plant invasions, and suggests that positive as well as |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://ruor.uottawa.ca/bitstream/10393/28910/1/MR79683.PDF |
| Language | English |
| Access Restriction | Open |
| Subject Keyword | Arthur Pollen Barnettozyma salicaria Community Cyrtosperma Decodon |
| Content Type | Text |
| Resource Type | Article |
