Rachel’s Google Scholar Profile  and Orcid ID

Bold indicates coauthors who are or were members of the Vannette lab when work was performed.

For FREE versions of each paper, see links below or visit:

Seasonal assembly of nectar microbial communities across angiosperm plant species: assessing contributions of climate and plant traits. Jacob Cecala, Leta Landucci, Rachel Vannette. Authorea. July 16, 2024. DOI: 10.22541/au.172115321.11940961/v1

Population-specific patterns of toxin sequestration in monarch butterflies from around the world. Freedman, M., Choquette, S. L., Ramirez, S., Strauss, S., Hunter, M., & Vannette, R.  bioRxiv.


Targeted Viromes and Total Metagenomes Capture Distinct Components of Bee Gut Phage Communities. Dino Lorenzo Sbardellati, Rachel Lee Vannette Microbiome, accepted.

Symbiotic bacteria and fungi proliferate during diapause and may enhance overwintering survival in a solitary bee. Shawn M Christensen, Sriram Srinivas, Quinn S McFrederick, Bryan Danforth, Stephen L Buchmann, Rachel L Vannette,

Nontarget impacts of neonicotinoids on nectar-inhabiting microbes. Jacob M. Cecala, Rachel L. Vannette  Environmental Microbiology

Plant species within Streptanthoid Complex associate with distinct microbial communities that shift to be more similar under drought. Allie N. Igwe, Ian S. Pearse, Jessica M. Aguilar, Sharon Y. StraussRachel L. Vannette bioRxiv


Microbes, the ‘silent third partners’ of bee–angiosperm mutualisms. Shawn A. Steffan, Prarthana S. Dharampal, Jordan G. Kueneman, Alexander Keller, Magda P. Argueta-Guzmán, Quinn S. McFrederick, Stephen L. Buchmann, Rachel L. Vannette, Anna F. Edlund, Celeste C. Mezera, Nolan Amon, Bryan N. Danforth, Trends in Ecology & Evolution, 2023, FREE ACCESS:

Dispersal overwhelms variation in host quality to shape nectar microbiome assembly, Jacob S. Francis, Tobias G. Mueller, Rachel L. Vannette

Bees just wanna have fungi: a review of bee associations with non-pathogenic fungi, Danielle Rutkowski, Makena Weston, Rachel L. Vannette FEMS Microbiology Ecology, 2023;, fiad077, OPEN ACCESS

*highlighted as Editor’s choice:**

Nectar compounds impact bacterial and fungal growth and shift community dynamics in a nectar analog,  Tobias G Mueller, Jacob S Francis, Rachel L Vannette,

Disease management during bloom affects the floral microbiome but not pollination in a mass-flowering crop. RN Schaeffer, DW Crowder, JG Illán,  JJ Beck, T Fukami, NM Williams, RL Vannette Journal of Applied Ecology 2023; 60:64-76 DOI: 10.1111/1365-2664.14320


Incipiently social carpenter bees (Xylocopa) host distinctive gut bacterial communities and display geographic structure as revealed by full-length PacBio 16S sequencing” Madeline Handy*^; Dino Sbardellati*; Michael Yu^; Nicholas Saleh; Madeleine Ostwald; Rachel Vannette, Molecular Ecology

Thermal sensitivity and seasonal change in the gut microbiome of a desert ant, Cephalotes rohweri. MS McMunn, AI Hudson, A Zemenick, M Egerer, SM Philpott, RL Vannette FEMS Microbiology Ecology, (Free access link here)

Bee-associated fungi mediate effects of fungicides on bumble bees. Rutkowski DR, Litsey E, Maalouf I, Vannette RL. Ecological Entomology 47:3 411-422.

Floral microbes suppress growth of Monilinia laxa with minimal effects on honey bee feeding. Crowley-Gall, A., Trouillas, F., Nino, E. L., Schaeffer, R. N., Nouri, M. T., Crespo, M., & Vannette, RL. (2022). Plant Disease, accepted, early view:


Culturable bacteria are more common than fungi in floral nectar and are more easily dispersed by thrips, a ubiquitous flower visitor. Vannette RL, McMunn MM, Hall G, Munkres I, Mueller TM, Munkres I, Perry D, FEMS Microbiology Ecology, in press, preprint here:

Microbiome composition of Anna’s Hummingbirds (Calypte anna) differs among regions of the gastrointestinal tract. R Dutch, L Tell, R Bandivadekar, RL Vannette . Journal of Avian Biology, in press. OPEN ACCESS:





Nectar bacteria stimulate pollen germination and bursting to enhance microbial fitness. SM Christensen, I Munkres, RL Vannette Current Biology OPEN ACCESS

Orchard management and landscape context mediate the floral microbiome of pear. RN Schaeffer, VW Pfeiffer, S Basu, M Brousil, C Strohm, ST DuPont, RL Vannette, D Crowder. bioRxiv, Applied and Environmental Microbiology, accepted & in press.

Acinetobacter pollinis sp. nov., Acinetobacter baretiae sp. nov., and Acinetobacter rathckeae sp. nov., isolated from floral nectar and honeybees” Sergio Alvarez-Perez; Lydia J. Baker; Megan M. Morris; Kaoru Tsuji; Vivianna A. Sanchez; Tadashi Fukami; Rachel L. Vannette; Bart Lievens; Tory A. Hendry. International Journal of Systematic and Evolutionary Microbiology (in press; link to Zenodo preprint:

Floral visitation networks shape plant-microbe interactions, Zemenick, A. Vannette RL, Rosenheim J. Oikos (, FREE FULL TEXT share link:

Nitrogen assimilation varies among clades of nectar- and insect-associated acinetobacters. Álvarez-Pérez S, Tsuji K, Donald ML, Van Assche A, Vannette RL, Herrera CM, Jacquemyn H, Fukami T, Lievens B 2021. Microbial Ecology (preprint here; doi:

Floral traits affecting the transmission of beneficial and pathogenic pollinator-associated microbes. Adler LS, Irwin RE, McArt SH, Vannette RL. 2021. Current Opinion in Insect Science in press

Volatile microbial semiochemicals and insect perception at flowers. Crowley-Gall A, Rering CR, Rudolph, AB, Vannette RL, Beck JB, 2021. Current Opinion in Insect Science in press


The floral microbiome: Plant, pollinator and microbial perspectives Vannette, RL Annual Reviews of Ecology, Evolution and Systematics 51, 363-386 Link

Co-inoculation of nectar microbes affects metabolite expression and pollinator attraction, Rering C, Schaeffer R, Vannette RL, Beck J. 2020 Journal of Chemical Ecology.

Organic management promotes natural pest control through altered plant resistance to insects, Blundell, R, Schmidt JE, Igwe AI, Cheung AL, Vannette RL, Gaudin A, Casteel, C 2020. Nature Plants 6 (5) 483-491. FREE FULL TEXT

*Microbial abundance, composition, and function in nectar are shaped by flower visitor identity, Megan M Morris, NJ Frixione, AC Burkert, EA Dinsdale, RL Vannette, FEMS Microbiology Ecology, , fiaa003, FREE FULL TEXT 

*highlighted as Editor’s choice and the winner of the FEMS Microbiology Ecology best paper award 2020!! **


Igwe, A. N., & Vannette, R. L. (2019). Bacterial communities differ between plant species and soil type, and differentially influence seedling establishment on serpentine soils. Plant and Soil, 1-15. pdf

Schaeffer, R. N., Rering, C. C., Maalouf, I., Beck, J. J., & Vannette, R. L. (2019). Microbial metabolites elicit distinct olfactory and gustatory preferences in bumblebees. Biology letters, 15(7), 20190132.

Schmidt, J. E., Vannette, R. L., Igwe, A., Blundell, R., Casteel, C. L., & Gaudin, A. C. (2019). Effects of agricultural management on rhizosphere microbial structure and function in processing tomato. Applied and environmental microbiology, AEM-01064.

Lee, C. Tell L, T Hilfer, Vannette RL. Microbial communities in hummingbird feeders are distinct from floral nectar and influenced by bird visitation. Online early, Proceedings of the Royal Society B: Biological Sciences rspb.2018.2295


Zemenick, A., Rosenheim, J, Vannette RL. Legitimate visitors and nectar robbers of Aquilegia formosa have different effects on nectar bacterial communities, Ecosphere e02459

Rering CC, Beck JB, Vannette RL, Willms SD. Quantitative assessment of nectar microbe-produced volatiles. Role of Natural Products for Biorational Pesticides in Agriculture. ACS. Book Chapter

Vannette RL and Fukami T, Contrasting effects of yeast and bacteria on floral nectar traits, Annals of Botany, 121 (7), 1343-1349.

Rering CC; Beck JJ; Hall GW; McCartney MM; Vannette RL. Nectar-inhabiting microorganisms influence nectar volatile composition and attractiveness to a generalist pollinator. New Phytologist, Early View, UCD Full Text

Toju H, Vannette RL, Gauthier MPL, Dhami MK, and Fukami T. 2018. Priority effects can persist across floral generations in nectar microbial metacommunities. Oikos 127:3, 345–352. Accepted manuscript

  • highlighted as Editor’s Choice


EG Pringle, I Ableson, J Kerber, RL Vannette, L Tao. 2017 Orthogonal fitness benefits of nitrogen and ants for nitrogen-limited plants in the presence of herbivores. Ecology 98 (12), 3003-3010.

2017 Mittelbach M. and Vannette RL. Book chapter: Mutualism in Yeasts, in Springer Edited Volume on Yeasts in Natural Ecosystems: Ecology. Edited by Buzzini et al. link email RLV for a pdf

2017 Vannette, RL and Fukami T. Dispersal enhances beta diversity in nectar microbes. Ecology Letters, 20:901-910. LINK  ResearchGateLINK

2017 Beck JJ & Vannette RL. Harnessing Insect–Microbe Chemical Communications To Control Insect Pests of Agricultural Systems.  Journal of Agricultural and Food Chemistry. OPEN ACCESS

  • Picked as Editor’s choice

2017 Vannette RL, Bichier, P, Philpott S. The presence of aggressive ants is associated with fewer insect visits to coffee flowers and altered floral microbe communities in coffee flowers, Basic and Applied Ecology 20:62-74 LINK PDF


2016 Schaeffer, R. N., Vannette, R. L., Brittain, C., Williams, N. M., & Fukami, T. Non‐target effects of fungicides on nectar‐inhabiting fungi of almond flowers. Environmental Microbiology Reports.

2016 Vannette RL, Leopold D, Fukami T. Forest area and connectivity influence root-associated fungal communities in a fragmented landscape. Ecology 97 (9) 2374-2383 LINK

2016 Vannette, RL, Fukami T, Nectar microbes can reduce secondary metabolites in nectar and alter effects on nectar consumption by pollinators.  Ecology 97 (6): 1410-1419 LINK


2015 Vannette, RL, Mohamed A., Johnson, B.R. Forager bees (Apis mellifera) highly express immune and detoxification genes in tissues associated with nectar processing. Scientific Reports 5, no. 16224. OPEN ACCESS

2015 Schaeffer, R.N., Vannette RL, Irwin RE. Nectar yeasts in Delphinium nuttallianum (Ranunculaceae) and their effects on nectar quality. Fungal Ecology 18 100-106. Access here


2014. Pringle, E, Novo A, Ableson I, Barbehenn R and Vannette RL. Plant-derived variation in the composition of aphid honeydew and its effects on colonies of aphid-tending ants. Ecology and Evolution 4(21)4065–4079. OPEN ACCESS

2014 Vannette RL and Hunter MD. Genetic variation in plant below-ground response to elevated CO2 and two herbivore species. Plant and Soil. 384:303-314. LINK

2014 Good, A.P.§, Gauthier M.-P., Vannette R.L.,  and Fukami T. Honey bees avoid nectar colonized by three bacterial species, but not by a yeast species, isolated from the bee gut. PLoS One. OPEN ACCESS

2014 Vannette R.L., and T. Fukami. Historical contingency in species interactions: towards niche-based predictions. Ecology Letters. Vol. 17(1)115-124. OPEN ACCESS.

  • F1000 recommended (link)


2013 Vannette R.L., M.D. Hunter, S. Rasmann. Arbuscular mycorrhizal fungi alter above-and below-ground chemical defense expression differentially among Asclepias species. Frontiers in Plant Science. Vol. 4 OPEN ACCESS

2013 Vannette R.L. and M.D. Hunter. Mycorrhizal abundance affects the expression of plant defense and herbivore performance. Journal of Ecology. 101:1019-1029.pdf

2013 Vannette R.L., M-P. Gauthier, and T. Fukami. Nectar bacteria, but not yeast, weaken a plant-pollinator mutualism. Proceedings of the Royal Society B: Biological Sciences 280:20122601.pdf


2012 Vannette R.L. and S. Rasmann. Arbuscular mycorrhizal fungi mediate below-ground plant–herbivore interactions: a phylogenetic study. Functional Ecology. 26:1033-1042.pdf


2011 Rasmann S., Bauerle T., Poveda, K., Vannette, R.L. Predicting root resistance to herbivores during succession. Functional Ecology. 25:368-379.pdf

2011 Vannette R.L. and M.D. Hunter. Plant Defense Re-Examined: Nonlinear expectations based on the costs and benefits of resource mutualisms.  Journal of Ecology. 99:66-76.pdf

2011 Vannette R.L. and M.D. Hunter. Genetic variation in expression of defense phenotype may mediate evolutionary adaptation of Asclepias syriaca to elevated CO2. Global Change Biology. 17:1277-1288. pdf


2009 Vannette, R.L. and M.D. Hunter. Mycorrhizae as Mediators of Defense Against   Insect Pests in Agricultural Systems. Agricultural and Forest Entomology. 11:351-358.pdf


Notes: coauthors with names in bold were Vannette lab members when work on paper was completed.

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