• Publications
  • Influence
Mechanisms and evolution of deceptive pollination in orchids
TLDR
It is suggested that floral deception is particularly beneficial, because of its promotion of outcrossing, when pollinators are abundant, but that whenpollinators are consistently rare, selection may favour a nectar reward or a shift to autopollination. Expand
POLLINATION SUCCESS IN A DECEPTIVE ORCHID IS ENHANCED BY CO-OCCURRING REWARDING MAGNET PLANTS
TLDR
Results provide support for the existence of a facilitative magnet species effect in the interaction between certain nectar plants and A. morio at a site in Sweden. Expand
Evolutionary associations between nectar properties and specificity in bird pollination systems
TLDR
It is shown that the dichotomy between hummingbirds and passerine birds select for different nectar properties in the plants they pollinate is false and a more useful distinction is that between specialized and generalized bird pollination systems. Expand
Reconnecting plants and pollinators: challenges in the restoration of pollination mutualisms.
TLDR
It is proposed that pollination could be successfully restored in degraded ecosystems through the use of targeted restoration plantings to attract and sustain pollinators and increased knowledge of the ecological requirements of pollinators. Expand
The pollination niche and its role in the diversification and maintenance of the southern African flora
  • Steven D. Johnson
  • Biology, Medicine
  • Philosophical Transactions of the Royal Society B…
  • 12 February 2010
TLDR
The evidence that disturbance provokes pollination failure in some southern African plants with specialized pollination systems is considered, to consider the risk of plant extinction. Expand
Dark, bitter-tasting nectar functions as a filter of flower visitors in a bird-pollinated plant.
TLDR
The main effect of the phenolic compounds that impart a dark brown color to the nectar of the South African succulent shrub Aloe vryheidensis appears to be to repel "unwanted" nectarivores that find their bitter taste unpalatable. Expand
Darwin's beautiful contrivances: evolutionary and functional evidence for floral adaptation.
TLDR
A contrast between the inconsistent occurrence of phenotypic selection and convincing experimental and comparative evidence that floral traits are adaptations is revealed and suggests that the tempo of creative selection varies. Expand
Function and Evolution of Aggregated Pollen in Angiosperms
TLDR
The ability of orchid pollinia to reduce diminishing returns during pollination may explain both the floral diversity and the widespread occurrence of deceit pollination in this clade. Expand
POLLEN CARRYOVER, GEITONOGAMY, AND THE EVOLUTION OF DECEPTIVE POLLINATION SYSTEMS IN ORCHIDS
TLDR
The data indicated that the evolution of nectar production in deceptive Orchis species would result in moderate to high levels of geitonogamy, as a consequence of the greater number of flowers probed and longer visit duration by pollinators, however, the estimated levels were less than expected. Expand
Reproductive biology of Australian acacias: Important mediator of invasiveness?
TLDR
Invasive species respond quicker to disturbance than non-invasive taxa and are more commonly able to resprout, although only time to reproductive maturity was significant when phylogenetic relationships were controlled for. Expand
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