Northampton Electronic Collection of Theses and Research

Pollination ecology of the invasive tree tobacco Nicotiana glauca: comparisons across native and non-native ranges

Ollerton, J., Watts, S., Connerty, S., Lock, J., Parker, L., Wilson, I., Schueller, S., Nattero, J., Cocucci, A. A., Izhaki, I., Geerts, S., Pauw, A. and Stout, J. C. (2012) Pollination ecology of the invasive tree tobacco Nicotiana glauca: comparisons across native and non-native ranges. Journal of Pollination Ecology. 9 1920-7603.

Item Type: Article
Abstract: Interactions with pollinators are thought to play a significant role in determining whether plant species become invasive, and ecologically generalised species are predicted to be more likely to invade than more specialised species. Using published and unpublished data we assessed the floral biology and pollination ecology of the South American native Nicotiana glauca (Solanaceae) which has become a significant invasive of semi-arid parts of the world. In regions where specialised bird pollinators are available, for example hummingbirds in California and sunbirds in South Africa and Israel, N. glauca interacts with these local pollinators and sets seed by both out-crossing and selfing. In areas where there are no such birds, such as the Canary Islands and Greece, abundant viable seed is set by selfing, facilitated by the shorter stigma-anther distance compared to plants in native populations. Surprisingly, in these areas without pollinating birds, the considerable nectar resources are only rarely exploited by other flower visitors such as bees or butterflies, either legitimately or by nectar robbing. We conclude that Nicotiana glauca is a successful invasive species outside of its native range, despite its functionally specialised hummingbird pollination system, because it has evolved to become more frequently self pollinating in areas where it is introduced. Its invasion success is not predictable from what is known of its interactions with pollinators in its home range.
Uncontrolled Keywords: Argentina, California, Canary Islands, Greece, Israel, Peru, Solanaceae, South Africa, hummingbird, invasive species, mutualism, pollination, sunbird
Creators: Ollerton, Jeff, Watts, Stella, Connerty, Shawn, Lock, Julia, Parker, Leah, Wilson, Ian, Schueller, Sheila, Nattero, Julieta, Cocucci, Andrea A, Izhaki, Ido, Geerts, Sjirk, Pauw, Anton and Stout, Jane C
Faculties, Divisions and Institutes: Faculties > Faculty of Arts, Science & Technology > Environmental Science
Research Centres > Environment Research Group
Date: 1 January 2012
Date Type: Publication
Journal or Publication Title: Journal of Pollination Ecology
Volume: 9
Language: English
ISSN: 1920-7603
Status: Published / Disseminated
Refereed: Yes

Actions (login required)

Edit Item Edit Item