Evidence map›Paper›PMID 32917882›Full record

ArticleNature communications2020

Just ten percent of the global terrestrial protected area network is structurally connected via intact land.

Michelle Ward, Santiago Saura, Brooke Williams, Juan Pablo Ramírez-Delgado, Nur Arafeh-Dalmau, James R Allan, Oscar Venter, Grégoire Dubois, James E M Watson

Abstract read
In one paragraph

Article in Nature communications, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 33 papers.

0numbers the graph read from it
0cells of the map it votes in
33citing 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

33 citing papers in PubMed.

  1. Article
  2. Centering geospatial data uncertainty and the potential for injustice in pastoralist rangeland conservation prioritization.Conservation biology : the journal of the Society for Conservation Biology · 2026
    Article
  3. Article
  4. Article
  5. Assessing Ecological Connectivity forEcology and evolution · 2026
    Article
  6. Article
  7. Article
  8. Article
  9. Article
  10. Article
  11. Mixed effects of protected areas on avian food webs.Proceedings. Biological sciences · 2025
    Article
  12. Article
  13. Article
  14. Article
  15. Article
  16. Article
  17. Article
  18. Review
  19. Article
  20. Connecting tiger (Ecology and evolution · 2023
    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

9 authors.

Michelle WardSchool of Earth and Environmental Sciences, University of Queensland, Brisbane, QLD, 4072, Australia. m.ward@uq.edu.au.ORCID http://orcid.org/0000-0002-0658-855X
Santiago SauraEuropean Commission, Joint Research Centre (JRC), Via E. Fermi 2749, I-21027, Ispra, VA, Italy.
Brooke WilliamsSchool of Earth and Environmental Sciences, University of Queensland, Brisbane, QLD, 4072, Australia.ORCID http://orcid.org/0000-0002-0692-7507
Juan Pablo Ramírez-DelgadoNatural Resources and Environmental Studies Institute, University of Northern British Columbia, Prince George, BC, Canada.ORCID http://orcid.org/0000-0003-2673-0741
Nur Arafeh-DalmauSchool of Earth and Environmental Sciences, University of Queensland, Brisbane, QLD, 4072, Australia.ORCID http://orcid.org/0000-0001-9053-0037
James R AllanCentre for Biodiversity and Conservation Science, The University of Queensland, Brisbane, QLD, 4072, Australia.
Oscar VenterNatural Resources and Environmental Studies Institute, University of Northern British Columbia, Prince George, BC, Canada.
Grégoire DuboisEuropean Commission, Joint Research Centre (JRC), Via E. Fermi 2749, I-21027, Ispra, VA, Italy.ORCID http://orcid.org/0000-0002-0515-7168
James E M WatsonSchool of Earth and Environmental Sciences, University of Queensland, Brisbane, QLD, 4072, Australia.ORCID http://orcid.org/0000-0003-4942-1984

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Land free of direct anthropogenic disturbance is considered essential for achieving biodiversity conservation outcomes but is rapidly eroding. In response, many nations are increasing their protected area (PA) estates, but little consideration is given to the context of the surrounding landscape. This is despite the fact that structural connectivity between PAs is critical in a changing climate and mandated by international conservation targets. Using a high-resolution assessment of human pressure, we show that while ~40% of the terrestrial planet is intact, only 9.7% of Earth's terrestrial protected network can be considered structurally connected. On average, 11% of each country or territory's PA estate can be considered connected. As the global community commits to bolder action on abating biodiversity loss, placement of future PAs will be critical, as will an increased focus on landscape-scale habitat retention and restoration efforts to ensure those important areas set aside for conservation outcomes will remain (or become) connected.

Identifiers

PMID32917882
PMCPMC7486388

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.