Evidence map›Paper›PMID 33468666›Full record

ArticleProceedings of the National Academy of Sciences of the United States of America2021

Pervasive cropland in protected areas highlight trade-offs between conservation and food security.

Varsha Vijay, Paul R Armsworth

Abstract read
In one paragraph

Article in Proceedings of the National Academy of Sciences of the United States of America, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers.

0numbers the graph read from it
0cells of the map it votes in
15citing 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

15 citing papers in PubMed.

  1. Article
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  5. Evaluating protected areas' coverage of threats to terrestrial biodiversity.Conservation biology : the journal of the Society for Conservation Biology · 2025
    Article
  6. Eliminating hunger in a world serious about climate mitigation.Proceedings of the National Academy of Sciences of the United States of America · 2025
    Article
  7. Article
  8. Article
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  11. Article
  12. Article
  13. Biodiversity effects of food system sustainability actions from farm to fork.Proceedings of the National Academy of Sciences of the United States of America · 2022
    Article
  14. Article
  15. Pervasive cropland in protected areas highlight trade-offs between conservation and food security.Proceedings of the National Academy of Sciences of the United States of America · 2021
    Article
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.

Varsha VijayNational Socio-Environmental Synthesis Center, University of Maryland, Annapolis, MD 21401; vvijay@sesync.org.
Paul R ArmsworthDepartment of Ecology and Evolutionary Biology and National Institute for Mathematical and Biological Synthesis, University of Tennessee, Knoxville, TN 37996.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Global cropland expansion over the last century caused widespread habitat loss and degradation. Establishment of protected areas aims to counteract the loss of habitats and to slow species extinctions. However, many protected areas also include high levels of habitat disturbance and conversion for uses such as cropland. Understanding where and why this occurs may realign conservation priorities and inform protected area policy in light of competing priorities such as food security. Here, we use our global synthesis cropland dataset to quantify cropland in protected areas globally and assess their relationship to conservation aims and socio-environmental context. We estimate that cropland occupies 1.4 million km

Indexed as

Conservation of Natural ResourcesEcosystemFood SecurityAgricultureBiodiversityCrops, AgriculturalExtinction, BiologicalForestsHumansPopulation Densityarea-based targetsCBDconservationfood securityprotected areas

Identifiers

PMID33468666
PMCPMC7848742

What OpenQuestion holds

Textmetadata
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.