Evidence map›Paper›PMID 32205427›Full record

ArticleProceedings of the National Academy of Sciences of the United States of America2020

Introduced herbivores restore Late Pleistocene ecological functions.

Erick J Lundgren, Daniel Ramp, John Rowan, Owen Middleton, Simon D Schowanek, Oscar Sanisidro, Scott P Carroll, Matt Davis, Christopher J Sandom, Jens-Christian Svenning and 1 more

Erratum issuedAbstract read
In one paragraph

Article in Proceedings of the National Academy of Sciences of the United States of America, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. An erratum has been issued. Cited by 29 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
29citing papers in PubMed, 1 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

29 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
  2. Reevaluating introduced herbivores in conservation.Conservation biology : the journal of the Society for Conservation Biology · 2026
    Article
  3. Trait-based approaches to restoration ecology: Synthesizing insights from diverse systems.Ecological applications : a publication of the Ecological Society of America · 2026
    Review
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  14. Defaunation and species introductions alter long-term functional trait diversity in insular reptiles.Proceedings of the National Academy of Sciences of the United States of America · 2023
    Article
  15. Megaherbivores modify forest structure and increase carbon stocks through multiple pathways.Proceedings of the National Academy of Sciences of the United States of America · 2023
    Article
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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

11 authors.

Erick J LundgrenCentre for Compassionate Conservation, Faculty of Science, University of Technology Sydney, Ultimo 2007, NSW, Australia; erick.lundgren@student.uts.edu.au.ORCID 0000-0001-9893-3324
Daniel RampCentre for Compassionate Conservation, Faculty of Science, University of Technology Sydney, Ultimo 2007, NSW, Australia.
John RowanOrganismic and Evolutionary Biology, University of Massachusetts Amherst, Amherst, MA 01003.ORCID 0000-0002-5062-4044
Owen MiddletonSchool of Life Sciences, University of Sussex, Brighton BN1 9RH, United Kingdom.ORCID 0000-0002-0813-6995
Simon D SchowanekSection for Ecoinformatics and Biodiversity, Department of Biology, Aarhus University, DK 8000 Aarhus C, Denmark.
Oscar SanisidroDepartamento Ciencias de la Vida, Universidad de Alcalá, 28801 Alcalá de Henares, Spain.
Scott P CarrollDepartment of Entomology and Nematology, University of California, Davis, CA 95616.ORCID 0000-0003-2094-9398
Matt DavisNatural History Museum of Los Angeles County, Los Angeles, CA 90007.
Christopher J SandomSchool of Life Sciences, University of Sussex, Brighton BN1 9RH, United Kingdom.
Jens-Christian SvenningSection for Ecoinformatics and Biodiversity, Department of Biology, Aarhus University, DK 8000 Aarhus C, Denmark.ORCID 0000-0002-3415-0862
Arian D WallachCentre for Compassionate Conservation, Faculty of Science, University of Technology Sydney, Ultimo 2007, NSW, Australia.ORCID 0000-0002-6640-3887

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Large-bodied mammalian herbivores dominated Earth's terrestrial ecosystems for several million years before undergoing substantial extinctions and declines during the Late Pleistocene (LP) due to prehistoric human impacts. The decline of large herbivores led to widespread ecological changes due to the loss of their ecological functions, as driven by their unique combinations of traits. However, recently, humans have significantly increased herbivore species richness through introductions in many parts of the world, potentially counteracting LP losses. Here, we assessed the extent to which introduced herbivore species restore lost-or contribute novel-functions relative to preextinction LP assemblages. We constructed multidimensional trait spaces using a trait database for all extant and extinct mammalian herbivores ≥10 kg known from the earliest LP (∼130,000 ybp) to the present day. Extinction-driven contractions of LP trait space have been offset through introductions by ∼39% globally. Analysis of trait space overlap reveals that assemblages with introduced species are overall more similar to those of the LP than native-only assemblages. This is because 64% of introduced species are more similar to extinct rather than extant species within their respective continents. Many introduced herbivores restore trait combinations that have the capacity to influence ecosystem processes, such as wildfire and shrub expansion in drylands. Although introduced species have long been a source of contention, our findings indicate that they may, in part, restore ecological functions reflective of the past several million years before widespread human-driven extinctions.

Indexed as

Biological EvolutionIntroduced SpeciesAnimalsBiodiversityEcosystemExtinction, BiologicalHerbivoryHumansMammalsfunctional ecologyinvasionmegafaunanovel ecosystemsrestoration ecology

Identifiers

PMID32205427
PMCPMC7148574

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.