Evidence map›Paper›PMID 25653457›Full record

ArticleThe Journal of applied ecology2014

Land-use intensity and the effects of organic farming on biodiversity: a hierarchical meta-analysis.

Sean L Tuck, Camilla Winqvist, Flávia Mota, Johan Ahnström, Lindsay A Turnbull, Janne Bengtsson

Abstract read
In one paragraph

Article in The Journal of applied ecology, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 90 papers, 6 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
90citing 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

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

  1. Complex agricultural landscapes host more biodiversity than simple ones: A global meta-analysis.Proceedings of the National Academy of Sciences of the United States of America · 2022
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  5. The role of agri-environment schemes in conservation and environmental management.Conservation biology : the journal of the Society for Conservation Biology · 2015
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30 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

6 authors.

Sean L TuckDepartment of Plant Sciences, University of Oxford Oxford, OX1 3RB, UK.
Camilla WinqvistSection for Landscape and Soil Ecology, Department of Ecology, SLU Box 7044, Uppsala, S-750 07, Sweden.
Flávia MotaInstitute of Evolutionary Biology and Environmental Studies, University of Zurich Zurich, 8057, Switzerland.
Johan AhnströmSection for Landscape and Soil Ecology, Department of Ecology, SLU Box 7044, Uppsala, S-750 07, Sweden.
Lindsay A TurnbullDepartment of Plant Sciences, University of Oxford Oxford, OX1 3RB, UK ; Institute of Evolutionary Biology and Environmental Studies, University of Zurich Zurich, 8057, Switzerland.
Janne BengtssonSection for Landscape and Soil Ecology, Department of Ecology, SLU Box 7044, Uppsala, S-750 07, Sweden.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The benefits of organic farming to biodiversity in agricultural landscapes continue to be hotly debated, emphasizing the importance of precisely quantifying the effect of organic vs. conventional farming. We conducted an updated hierarchical meta-analysis of studies that compared biodiversity under organic and conventional farming methods, measured as species richness. We calculated effect sizes for 184 observations garnered from 94 studies, and for each study, we obtained three standardized measures reflecting land-use intensity. We investigated the stability of effect sizes through time, publication bias due to the 'file drawer' problem, and consider whether the current literature is representative of global organic farming patterns. On average, organic farming increased species richness by about 30%. This result has been robust over the last 30 years of published studies and shows no sign of diminishing. Organic farming had a greater effect on biodiversity as the percentage of the landscape consisting of arable fields increased, that is, it is higher in intensively farmed regions. The average effect size and the response to agricultural intensification depend on taxonomic group, functional group and crop type. There is some evidence for publication bias in the literature; however, our results are robust to its impact. Current studies are heavily biased towards northern and western Europe and North America, while other regions with large areas of organic farming remain poorly investigated.

Indexed as

agricultural managementdiversityfarming systemslandscape complexityspecies richness

Identifiers

PMID25653457
PMCPMC4299503

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.