|Appears in Collections:||Biological and Environmental Sciences Journal Articles|
|Peer Review Status:||Refereed|
|Title:||Pollination of the invasive exotic shrub Lupinus arboreus (Fabaceae) by introduced bees in Tasmania|
|Authors:||Stout, Jane C|
Kells, Andrea R
|Citation:||Stout JC, Kells AR & Goulson D (2002) Pollination of the invasive exotic shrub Lupinus arboreus (Fabaceae) by introduced bees in Tasmania, Biological Conservation, 106 (3), pp. 425-434.|
|Abstract:||Exotic plant invasions threaten ecological communities world-wide. Some species are limited by a lack of suitable pollinators, but the introduction of exotic pollinators can facilitate rapid spread. In Tasmania, where many non-native plants are naturalised, exotic honeybees (Apis mellifera) and bumblebees (Bombus terrestris) have become established. We determined how these species affect the pollination of Lupinus arboreus, an invasive, nitrogen-fixing shrub, which is rarely visited by native pollinators. The proportion of flowers setting seed and the number of ovules fertilised per flower were positively related to the visitation rates of both exotic bee species. There was no effect of bee visitation rates on the proportion of seeds aborted prior to maturity, possibly due to post-fertilisation environmental constraints. We conclude that the spread of B. terrestris may not alter the fecundity of L. arboreus because of the pollination service provided by A. mellifera, and discuss potential interactions between these two bee species.|
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