Evidence map›Paper›PMID 34238378›Full record

ArticleAnimal microbiome2021

Captivity reduces diversity and shifts composition of the Brown Kiwi microbiome.

Priscilla A San Juan, Isabel Castro, Manpreet K Dhami

Open access · goldAbstract read
In one paragraph

Article in Animal microbiome, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 38 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
38citing papers in PubMed, 1 pooled it
4.4field-weighted citation impact, top 4% of its field
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

38 citing papers in PubMed, 1 synthesis or guideline pooled it, 70 citations in OpenAlex.

  1. Pooled it
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  16. Comparative assessment of Texas horned lizard (Frontiers in microbiomes · 2025
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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

3 authors at 3 institutions in 2 countries.

Priscilla A San JuanDepartment of Biology, Stanford University, 371 Serra Mall, Stanford, California, 94305, USA. psanjuan@stanford.edu.
Isabel CastroWildlife and Ecology Group, School of Agriculture and Environment, Massey University, Palmerston North, New Zealand.
Manpreet K DhamiManaaki Whenua - Landcare Research, 54 Gerald Street, 7608, Lincoln, New Zealand. dhamim@landcareresearch.co.nz.
Manaaki Whenua – Landcare Research · NZMassey University · NZStanford University · US

Funding

Birds New Zealand Birds New ZealandMarsden Fund 17-MAU-154Ministry of Business, Innovation, and Employment (Security for Iconic Species: Kiwi Rescue) 482 C09X1609Ministry of Business, Innovation, and Employment (Strategic Science Investment Fund) Ministry of Business, Innovation, and Employment (Strategic Science Investment Fund)
6 · The paper itself

Abstract

backgroundCaptive rearing is often critical for animals that are vulnerable to extinction in the wild. However, few studies have investigated the extent to which captivity impacts hosts and their gut microbiota, despite mounting evidence indicating that host health is affected by gut microbes. We assessed the influence of captivity on the gut microbiome of the Brown Kiwi (Apteryx mantelli), a flightless bird endemic to New Zealand. We collected wild (n = 68) and captive (n = 38) kiwi feces at seven sites on the north island of New Zealand.

resultsUsing bacterial 16 S rRNA and fungal ITS gene profiling, we found that captivity was a significant predictor of the kiwi gut bacterial and fungal communities. Captive samples had lower microbial diversity and different composition when compared to wild samples. History of coccidiosis, a gut parasite primarily affecting captive kiwi, showed a marginally significant effect.

conclusionsOur findings demonstrate captivity's potential to shape the Brown Kiwi gut microbiome, that warrant further investigation to elucidate the effects of these differences on health.

Identifiers

PMID34238378
PMCPMC8268595
OpenAlexW3122742649

What OpenQuestion holds

Textmetadata
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.