Rachel L. Vannette

Heatwaves do not impact bacteria within pollen provisions, despite accelerating blue orchard bee ( Osmia lignaria ) larval development

A.N. Martin, Neal M. Williams, Rachel L. Vannette

Abstract Many insect populations are experiencing thermal stress as a result of global change, making it imperative to investigate how their relationship with other organisms will be impacted by heat disturbances. Microbial symbionts, such as bacteria, have the potential to enhance or …

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Floral microbes provisioned by Osmia lignaria establish in larval food stores, but do not affect bee development or survival

A.N. Martin, Clara Stuligross, N. M. Williams, Helen M. Noroian et autres

Microbial dispersal and subsequent establishment among linked habitats can be used to examine drivers of community assembly and function. Flowers host microbial communities that can be acquired and vectored by bees to new flowers, establish within the adult bee gut, and enter …

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Streptomyces anthophorae sp. nov. and Streptomyces nidicola sp. nov., novel actinobacteria isolated from a solitary bee

Shawn M. Christensen, Martin Kaltenpoth, Heiko Vogel, Rachel L. Vannette

Six novel actinobacterial strains (BH034 T , BH055, BH097, BH104, BH105 and BH106 T ) were isolated from developing brood in nests of the solitary bee species Anthophora bomboides from Bodega Bay, California, USA. Phylogenetic analysis based on a five-gene multilocus sequence …

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Contribution of Floral Transmission to the Assembly and Health Impact of Bacterial Communities in Watermelon Seeds

Gillian E. Bergmann, C. Lopez, Coralie Marais, Matthieu Barret et autres

Flower-sourced assembly of seed microbiota remains an understudied ecological process. Here, we investigated the floral transmission pathway for bacterial acquisition by developing seeds of watermelon ( Citrullus lanatus). Comparison of stigma- and seed-associated bacterial communities from field-grown C. lanatus revealed significant overlap: …

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Zygosaccharomyces progenitor sp. nov., a new yeast species associated with bees of the genera Apis and Bombus

Ana Pontes, Margarida Silva, Danielle Rutkowski, Ana Cláudia Carvalho et autres

A novel ascomycetous yeast species of the genus Zygosaccharomyces is proposed, based on isolates obtained in Japan, Portugal and the USA, and on a combination of conventional DNA barcode sequence analyses and whole-genome phylogenies. The new species is described as Zygosaccharomyces progenitor …

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Bee Microbiomes Harbor Diverse Antimicrobial Resistance Genes on Plasmids

Dino Lorenzo Sbardellati, Rachel L. Vannette

Abstract Antimicrobial resistance (AMR) is an emerging public health threat. In North America, tetracycline and macrolide antibiotics are often used to prevent or treat bacterial infections in honey bees. Previous research has shown that this practice has led to widespread drug resistance …

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Effects of live yeasts and their metabolic products on bumble bee microcolony development

Danielle Rutkowski, Makena Weston, Rachel L. Vannette

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Floral microbes provisioned by Osmia lignaria establish in larval food stores, but do not affect bee development or survival

A.N. Martin, Clara Stuligross, Neal M. Williams, Helen M. Noroian et autres

Abstract Microbial dispersal and subsequent establishment among linked habitats can be used to examine drivers of community assembly and function. Flowers host microbial communities that can be acquired and vectored by bees to new flowers, establish within the adult bee gut, and …

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Pollen diet, more than geographic distance, shapes provision microbiome composition in two species of cavity-nesting bees

Rachel L. Vannette, Neal M. Williams, Stephen S. Peterson, A.N. Martin

The microbial composition of stored food can influence its stability and the microbial species consumed by the organism feeding on it. Many bee species store nectar and pollen in provisions constructed to feed developing offspring. Yet, whether microbial composition is determined by …

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A wild bumble bee shows intraspecific differences in sensitivity to multiple pesticides

Anna R. Tatarko, Rachel L. Vannette, Steven A. Frese, Anne S. Leonard

Wild pollinator declines are increasingly linked to pesticide exposure, yet it is unclear how intraspecific differences contribute to observed variation in sensitivity, and the role gut microbes play in the sensitivity of wild bees is largely unexplored. Here, we investigate site-level differences …

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Author response for "A wild bumble bee shows intraspecific differences in sensitivity to multiple pesticides"

Anna R. Tatarko, Rachel L. Vannette, Steven A. Frese, Anne S. Leonard

Nectar peroxide: assessing variation among plant species, microbial tolerance, and effects on microbial community assembly

Leta Landucci, Rachel L. Vannette

Nectar contains antimicrobial constituents including hydrogen peroxide, yet it is unclear how widespread nectar hydrogen peroxide might be among plant species or how effective it is against common nectar microbes. Here, we surveyed 45 flowering plant species across 23 families and reviewed …

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