Agri-environment scheme nectar chemistry can suppress the social epidemiology of parasites in an important pollinator.
Agri-environment scheme nectar chemistry can suppress the social epidemiology of parasites in an important pollinator.
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农业环境方案花蜜化学可以抑制重要的授粉媒介中寄生虫的社会流行病学。
DOI：
10.1098/rspb.2021.0363
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发表时间：
2021-05-26
期刊：
影响因子：
--
通讯作者：
Brown MJF
中科院分区：
文献类型：
--
作者：
Folly AJ;Koch H;Farrell IW;Stevenson PC;Brown MJF
突发传染病是物种丧失的主要驱动因素之一。小孢子虫的突发感染与一组北美大黄蜂（一组重要的传粉者）的数量和范围下降有关。先前的研究表明，花粉和花蜜中的植物化学物质会对个体中的寄生虫产生负面影响，但这与社会流行病学的关系以及植物是否可以有效地用作传粉媒介疾病管理策略仍未得到探索。在这里，我们使用液相色谱法和质谱法对英国农业环境计划（AES）植物进行了全面筛选，该计划旨在使农业环境中的传粉者和更广泛的生物多样性受益，用于花粉和花蜜中的植物化学物质。咖啡因存在于一系列植物科中，在sainfoin （Onobrychis viciifolia）的花蜜中被鉴定出来，这是英国AES的一种成分，也是一种主要的全球作物。我们发现，无论是预防还是治疗，咖啡因都能显著降低个体大黄蜂（Bombus terrestris）的N.炸弹蜂感染强度，而且，这是第一次，这种影响影响了社会流行病学，从野生捕获的蜂王饲养的蜂群感染率和感染强度都较低。此外，从咖啡因处理过的蜂群中觅食的大黄蜂的感染流行率较低，这表明可能减少了种群水平的传播。综上所述，这些结果表明，当大黄蜂摄入天然咖啡因时，大黄蜂不太可能在群体内传播，这可能反过来降低环境患病率。因此，我们的研究结果表明，在生态相关浓度的花卉植物化学物质可以影响传粉媒介疾病的流行病学，并且可以选择增加花卉丰度以支持生物多样性的种植策略作为疾病管理工具。
Emergent infectious diseases are one of the main drivers of species loss. Emergent infection with the microsporidian Nosema bombi has been implicated in the population and range declines of a suite of North American bumblebees, a group of important pollinators. Previous work has shown that phytochemicals found in pollen and nectar can negatively impact parasites in individuals, but how this relates to social epidemiology and by extension whether plants can be effectively used as pollinator disease management strategies remains unexplored. Here, we undertook a comprehensive screen of UK agri-environment scheme (AES) plants, a programme designed to benefit pollinators and wider biodiversity in agricultural settings, for phytochemicals in pollen and nectar using liquid chromatography and mass spectrometry. Caffeine, which occurs across a range of plant families, was identified in the nectar of sainfoin (Onobrychis viciifolia), a component of UK AES and a major global crop. We showed that caffeine significantly reduces N. bombi infection intensity, both prophylactically and therapeutically, in individual bumblebees (Bombus terrestris), and, for the first time, that such effects impact social epidemiology, with colonies reared from wild-caught queens having both lower prevalence and intensity of infection. Furthermore, infection prevalence was lower in foraging bumblebees from caffeine-treated colonies, suggesting a likely reduction in population-level transmission. Combined, these results show that N. bombi is less likely to be transmitted intracolonially when bumblebees consume naturally available caffeine, and that this may in turn reduce environmental prevalence. Consequently, our results demonstrate that floral phytochemicals at ecologically relevant concentrations can impact pollinator disease epidemiology and that planting strategies that increase floral abundance to support biodiversity could be co-opted as disease management tools.
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DOI：
10.1073/pnas.1525266113
发表时间：
2016-04-19
影响因子：
11.1
作者：
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通讯作者：
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DOI：
10.1073/pnas.1014743108
发表时间：
2011-01-11
影响因子：
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