Evidence map›Paper›PMID 30836877›Full record

ArticleProceedings. Biological sciences2019

Microbial communities in hummingbird feeders are distinct from floral nectar and influenced by bird visitation.

Casie Lee, Lisa A Tell, Tiffany Hilfer, Rachel L Vannette

Abstract read
In one paragraph

Article in Proceedings. Biological sciences, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers.

0numbers the graph read from it
0cells of the map it votes in
17citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

17 citing papers in PubMed.

  1. Diversity and sources of floral microbial communities.Applied and environmental microbiology · 2026
    Review
  2. Article
  3. Article
  4. Review
  5. Article
  6. Review
  7. Article
  8. Article
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  10. Potential effects of nectar microbes on pollinator health.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2022
    Review
  11. Article
  12. Article
  13. Article
  14. Article
  15. Article
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

4 authors.

Casie Lee1 Department of Medicine and Epidemiology, School of Veterinary Medicine, University of California , Davis, CA , USA.
Lisa A Tell1 Department of Medicine and Epidemiology, School of Veterinary Medicine, University of California , Davis, CA , USA.
Tiffany Hilfer1 Department of Medicine and Epidemiology, School of Veterinary Medicine, University of California , Davis, CA , USA.
Rachel L Vannette2 Department of Entomology and Nematology, University of California , Davis, CA , USA.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Human provisioning can shape resource availability for wildlife, but consequences for microbiota availability and exchange remain relatively unexplored. Here, we characterized microbial communities on bills and faecal material of hummingbirds and their food resources, including feeders and floral nectar. We experimentally manipulated bird visitation to feeders and examined effects on sucrose solution microbial communities. Birds, feeders and flowers hosted distinct bacterial and fungal communities. Proteobacteria comprised over 80% of nectar bacteria but feeder solutions contained a high relative abundance of Proteobacteria, Firmicutes and Actinobacteria. Hummingbirds hosted bacterial taxa commonly found in other birds and novel genera including Zymobacter [Proteobacteria] and Ascomycete fungi. For feeders, bird-visited and unvisited solutions both accumulated abundant microbial populations that changed solution pH, but microbial composition was largely determined by visitation treatment. Our results reveal that feeders host abundant microbial populations, including some bird-associated microbial taxa. Microbial taxa in feeders were primarily non-pathogenic bacteria and fungi but differed substantially from those in floral nectar. These results demonstrate that human provisioning influences microbial intake by free-ranging hummingbirds; however, it is unknown how these changes impact hummingbird gastrointestinal flora or health.

Indexed as

Feeding BehaviorPlant NectarAnimalsAscomycotaBacteriaBirdsCaliforniaMicrobiotaSpecies SpecificityPlant NectarCalypte annacommunity assemblyfloral nectarhuman–bird interactionshummingbird microbiomewildlife

Identifiers

PMID30836877
PMCPMC6458324

What OpenQuestion holds

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.