Evidence map›Paper›PMID 32966309›Full record

ArticlePloS one2020

Alpha-, beta-, and gamma-diversity of bacteria varies across habitats.

Kendra E Walters, Jennifer B H Martiny

Abstract read
In one paragraph

Article in PloS one, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 125 papers, 6 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
125citing papers in PubMed, 6 pooled it
–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

125 citing papers in PubMed, 6 syntheses or guidelines pooled it.

  1. Pooled it
  2. Acne and the cutaneous microbiome: A systematic review of mechanisms and implications for treatments.Journal of the European Academy of Dermatology and Venereology : JEADV · 2025
    Pooled it
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  7. Article
  8. Microbial ecology of shallow groundwater ecosystems.Nature reviews. Microbiology · 2026
    Review
  9. Plant influence shapesMicrobiology spectrum · 2026
    Article
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  11. Review
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65 more citing papers are in PubMed but not listed here.

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

2 authors.

Kendra E WaltersDepartment of Ecology and Evolutionary Biology, University of California, Irvine, California, United States of America.ORCID 0000-0003-2596-9435
Jennifer B H MartinyDepartment of Ecology and Evolutionary Biology, University of California, Irvine, California, United States of America.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Bacteria are essential parts of ecosystems and are the most diverse organisms on the planet. Yet, we still do not know which habitats support the highest diversity of bacteria across multiple scales. We analyzed alpha-, beta-, and gamma-diversity of bacterial assemblages using 11,680 samples compiled by the Earth Microbiome Project. We found that soils contained the highest bacterial richness within a single sample (alpha-diversity), but sediment assemblages displayed the highest gamma-diversity. Sediment, biofilms/mats, and inland water exhibited the most variation in community composition among geographic locations (beta-diversity). Within soils, agricultural lands, hot deserts, grasslands, and shrublands contained the highest richness, while forests, cold deserts, and tundra biomes consistently harbored fewer bacterial species. Surprisingly, agricultural soils encompassed similar levels of beta-diversity as other soil biomes. These patterns were robust to the alpha- and beta- diversity metrics used and the taxonomic binning approach. Overall, the results support the idea that spatial environmental heterogeneity is an important driver of bacterial diversity.

Indexed as

EcosystemSoil MicrobiologyBacteriaDatabases, GeneticMicrobiotaRNA, Ribosomal, 16SRNA, Ribosomal, 16S

Identifiers

PMID32966309
PMCPMC7510982

What OpenQuestion holds

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LicenceCC BY
Read underepoch 390

Registered trials

None linked

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.