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Table I
Impacts of alien plants on native plant pollination. In all cases the main pollinators of the native plants are bees, except * where Diptera are the main pollinators.
| Alien plant species | Native plant species | Location | Impacts on native plant | Authors | |
|---|---|---|---|---|---|
| Impatiens glandulifera | Stachys palustris | Central Europe | Negative on visitation and seed set | Chittka and Schurkens, 2001 | |
| Impatiens glandulifera | Several | Britain | Facilitation for visitation, possible competition for pollen deposition | Lopezaraiza-Mikel et al.,2007 | |
| Impatiens glandulifera | Stachys palustris | Britain | Facilitation for visitation, depending on native plant density | Lopezaraiza Mikel, 2006 | |
| Lythrum salicaria | Impatiens capensis,Eupatorium perfoliatum, Eupatorium maculatum | Ontario, Canada | Negative on seed and fruit set | Grabas and Laverty, 1999 | |
| Lythrum salicaria | Lythrum alatum | USA | Negative on seed set | Brown B.J. et al., 2002 | |
| Carpobrotus acinaciformis | Lotus cytisoides, Cistus salviifolius,Anthyllis cytisoides,Cistus monspeliensis | Balearic islands | competitive effect (Lotus), facilitative effect (C. salviifolius and Anthyllis), no effect (C. monspeliensis) – effects not consistent over time | Moragues and Traveset, 2005 | |
| Carpobrotus acinaciformis | Dithyrea maritima,Cakile maritima | California, North America | No impact | Aigner, 2004 | |
| Carpobrotus edulis and C. affine acinaciformis | Asphodelus aestivus,Dorycnium hirsutum,Helichrysum stoechas | Majorca, Spain | Low levels of pollen deposition onstigmas, negative impact on seed setof H. stoechas | Jakobsson et al.2007 | |
| Carpobrotus affine acinaciformis and Opuntia stricta | Several | Spain | Facilitation (Carpobrotus) and competition (Opuntia) | Bartomeus et al.,2008b | |
| Rhododendron ponticum | Several | Ireland | Varied on visitation across locations and within flowering season | Dietzsch and Stout unpubl. data | |
| Heracleum mantegazzianum | Non-native Mimulusguttatus | Denmark | Enhanced visitation to native when close to alien but not seed set | Nielsen et al., 2008 | |
| Phacelia tanacetifolia | Melampyrum pratense | Norway | Visitation reduced, no impact on seed set | Totland et al., 2006 | |
| Euphorbia esula* | Linum lewisii ssp. lewisii, Oxytropislambertii ssp. lambertii | USA, N America | Variation in impacts on pollinator visitation, reduced pollen deposition | Larson et al., 2006 | |
| Chromolaena odorata | Dipterocarpus obtusifolius | Thailand | decreased visitation by butterflies but compensated by increased bird/mothpollination – no impact on seed set | Ghazoul, 2004 | |
| Solanum elaeagnifolium | Glaucium flavum | Lesvos, Greece | Reduced visitation | Petanidou et al., unpubl. data |