Bee microbiomes in a changing climate: Investigating the effects of temperature on solitary bee life history and health

IF 4.3 2区 生物学 Q2 MICROBIOLOGY Environmental microbiology Pub Date : 2024-11-08 DOI:10.1111/1462-2920.70002
Bailey L. Crowley, Robert N. Schaeffer
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Abstract

Climate change is rapidly warming thermal environments, an important abiotic stimulus governing interactions between microbial symbionts and their hosts. Increasing evidence suggests that solitary bees rely on pollen provision microbes for successful development. However, the effects of heat stress on provision microbiota and the resulting consequences for larval health and development remain to be examined. We performed an in vitro study to investigate the effects of the thermal environment on provision microbiome composition and measured fitness outcomes for Osmia lignaria larvae. While pollen sterilisation removed bacteria from microbe‐rich provisions, larval survivorship did not significantly differ between bees reared on microbe‐rich (unmanipulated) diets and provisions treated with ethylene oxide (EO) gas. In contrast to previous research in solitary bees, larvae reared on EO‐treated provisions weighed more and had higher total fat content, with temperature moderating the degree of difference. As anticipated, we observed a negative relationship between the duration of larval development and temperature. Our results indicated that an intact provision microbiota may not always improve bee fitness and that bee‐microbe interactions during larval development may contribute to the size‐shrinking effect observed for cavity‐nesting bees under warming conditions.

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不断变化的气候中的蜜蜂微生物群:调查温度对独居蜜蜂生活史和健康的影响
气候变化正在使热环境迅速变暖,这是影响微生物共生体与其宿主之间相互作用的重要非生物刺激因素。越来越多的证据表明,独居蜜蜂的成功发育依赖于花粉供给微生物。然而,热应激对花粉供给微生物群的影响以及由此对幼虫健康和发育造成的后果仍有待研究。我们进行了一项体外研究,调查热环境对花粉供给微生物群组成的影响,并测量了茭白幼虫的健康状况。虽然花粉灭菌可去除富含微生物的饲料中的细菌,但幼虫存活率在富含微生物(未经人工处理)的饲料和经环氧乙烷(EO)气体处理的饲料中并无显著差异。与之前对独居蜜蜂的研究不同的是,使用环氧乙烷处理过的饲料饲养的幼虫体重更大,总脂肪含量更高,而温度对差异程度有调节作用。正如预期的那样,我们观察到幼虫发育持续时间与温度之间呈负相关。我们的研究结果表明,完整的饲料微生物群不一定总能提高蜜蜂的体质,幼虫发育过程中蜜蜂与微生物的相互作用可能会导致穴巢蜜蜂在气候变暖条件下体型缩小。
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来源期刊
Environmental microbiology
Environmental microbiology 环境科学-微生物学
CiteScore
9.90
自引率
3.90%
发文量
427
审稿时长
2.3 months
期刊介绍: Environmental Microbiology provides a high profile vehicle for publication of the most innovative, original and rigorous research in the field. The scope of the Journal encompasses the diversity of current research on microbial processes in the environment, microbial communities, interactions and evolution and includes, but is not limited to, the following: the structure, activities and communal behaviour of microbial communities microbial community genetics and evolutionary processes microbial symbioses, microbial interactions and interactions with plants, animals and abiotic factors microbes in the tree of life, microbial diversification and evolution population biology and clonal structure microbial metabolic and structural diversity microbial physiology, growth and survival microbes and surfaces, adhesion and biofouling responses to environmental signals and stress factors modelling and theory development pollution microbiology extremophiles and life in extreme and unusual little-explored habitats element cycles and biogeochemical processes, primary and secondary production microbes in a changing world, microbially-influenced global changes evolution and diversity of archaeal and bacterial viruses new technological developments in microbial ecology and evolution, in particular for the study of activities of microbial communities, non-culturable microorganisms and emerging pathogens
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