DOES LINARIA VULGARIS, AN INVASIVE, INTERFERE WITH THE POLLINATION OF THE NATIVE SPECIES, POTENTILLA PULCHERRIMA?

Abstract

The need for information on invasive species has been growing more and more pressing as they continue to spread and crowd out native plants. Alarm over invasive species is often concerned with the vegetative crowding and homogenized habitats that they create. It has recently been recognized that the competition for pollinators between invasive and native plants is a pressing issue. This paper explores the competition over pollinator visitation between Linaria vulgaris, an invasive, and Potentilla pulcherrima, a native. Pollinator visits to patches with 100% P. pulcherrima were observed and compared with visitation to patches with 50% P. pulcherrima and 50% L. Linaria. Results yielded no significant difference between the number of visitors to P. pulcherrima when L. vulgaris was present. The presence of L. vulgaris did, however, alter the set of P. pulcherrima visitors. The alteration of the pollinator set of P. pulcherrima may or may not be important and future research should be conducted to determine the importance of different pollinators.

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