The effects of the invasive plant <i>Linaria vulgaris</i> on native plant fitness and pollinator behavior
Abstract
The invasion of the European perennial Linaria vulgaris to the alpine environment of Colorado may lead to competition for natural resources, space, and pollinators with native species. I measured the effects on fitness of L. vulgaris on three plant species native to Colorado, using both hand-pollination and controls to assess pollen limitation of seed set; plant size was measured for analysis as well, using root stalk diameter of Ipomopsis aggregata and number of flowering stalks of Linum lewisii and Potentilla pulcherrima, in the presence and absence of L. vulgaris. I also recorded pollinator visitations to my focal plants. The fruits for each plant were collected as they matured, and the number of aborted fruits were collected and recorded as well. The number of seeds was counted for each plant per collection day, as fruits often dehisced in the envelopes used to collect them. Analyses of plant size and mean floral display showed no significant difference in the presence of L. vulgaris as compared to its absence. These preliminary results suggest that L. vulgaris does not affect plant size or floral display in these three species.
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References (11)
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