African Nectar Drinkers
نویسندگان
چکیده
منابع مشابه
Nectar microbes can reduce secondary metabolites in nectar and alter effects on nectar consumption by pollinators.
Secondary metabolites that are present in floral nectar have been hypothesized to enhance specificity in plant-pollinator mutualism by reducing larceny by non-pollinators, including microorganisms that colonize nectar. However, few studies have tested this hypothesis. Using synthetic nectar, we conducted laboratory and field experiments to examine the effects of five chemical compounds found in...
متن کاملAncestral deceit and labile evolution of nectar production in the African orchid genus Disa.
An outstanding feature of the orchid family is that approximately 30-40% of the species have non-rewarding flowers and deploy various modes of deception to attract pollinators, whereas the remaining species engage in pollination mutualisms based on provision of floral rewards. Here, we explore the direction, frequency and reversibility of transitions between deceptive and rewarding pollination ...
متن کاملFloral Nectar Guide Patterns Discourage Nectar Robbing by Bumble Bees
Floral displays are under selection to both attract pollinators and deter antagonists. Here we show that a common floral trait, a nectar guide pattern, alters the behavior of bees that can act opportunistically as both pollinators and as antagonists. Generally, bees access nectar via the floral limb, transporting pollen through contact with the plant's reproductive structures; however bees some...
متن کاملThe Drinkers Degree: Risk Taking Behaviours amongst Undergraduate Student Drinkers
UNLABELLED Objective. To examine risk taking behaviours associated with alcohol consumption amongst UK undergraduate students. DESIGN AND METHODS A cross-sectional web survey was used to assess attitudes and health behaviours. The survey included the Alcohol Use Disorders Identification Test (AUDIT). Students were also asked about why they drank alcohol; about their preferred alcoholic bevera...
متن کاملWhy bother with nectar?
Orchids comprise one of the most spectacular groups of flowering plants but they are rather a mean bunch: a large number of species go to some length to attract pollinators but produce no nectar or other reward for their visit. This is a highly unusual strategy amongst flowering plants. So how do such ‘rewardless’ species manage to propagate themselves while surrounding plants must reward their...
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ژورنال
عنوان ژورنال: Nature
سال: 1967
ISSN: 0028-0836,1476-4687
DOI: 10.1038/216725a0