Evidence map›Paper›PMID 33397807›Full record

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

The decline of mammal functional and evolutionary diversity worldwide.

Jedediah F Brodie, Sara Williams, Brittany Garner

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 32 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
32citing 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

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

  1. Pooled it
  2. Article
  3. Article
  4. Article
  5. Article
  6. Article
  7. Article
  8. Role of protected areas in mitigating range loss and local extinctions of terrestrial mammals.Conservation biology : the journal of the Society for Conservation Biology · 2025
    Article
  9. Article
  10. Article
  11. Article
  12. Changes in community composition and functional diversity of European bats under climate change.Conservation biology : the journal of the Society for Conservation Biology · 2025
    Article
  13. European mammal turnover driven by a global rapid warming event preceding the Paleocene-Eocene Thermal Maximum.Proceedings of the National Academy of Sciences of the United States of America · 2025
    Article
  14. Article
  15. Article
  16. Article
  17. Article
  18. Article
  19. Article
  20. 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

3 authors.

Jedediah F BrodieWildlife Biology Program, University of Montana, Missoula, MT 59812; jedediah.brodie@umontana.edu.ORCID 0000-0002-8298-9021
Sara WilliamsWildlife Biology Program, University of Montana, Missoula, MT 59812.ORCID 0000-0001-6458-1316
Brittany GarnerWildlife Biology Program, University of Montana, Missoula, MT 59812.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Biodiversity is declining worldwide. Because species interact with one another and with their environment, losses of particular organisms alter the function of ecosystems. Our understanding of the global rates and specific causes of functional decline remains limited, however. Species losses also reduce the cumulative amount of extant evolutionary history ("phylogenetic diversity" [PD]) in communities-our biodiversity heritage. Here we provide a global assessment of how each known anthropogenic threat is driving declines in functional diversity (FD) and PD, using terrestrial mammals as a case study. We find that habitat loss and harvest (e.g., legal hunting, poaching, snaring) are by far the biggest drivers of ongoing FD and PD loss. Declines in FD in high-biodiversity countries, particularly in Southeast Asia and South America, are greater than would be expected if species losses were random with respect to ecological function. Among functional guilds, herbivores are disproportionately likely to be declining from harvest, with important implications for plant communities and nutrient cycling. Frugivores are particularly likely to be declining from both harvest and habitat loss, with potential ramifications for seed dispersal and even forest carbon storage. Globally, phylogenetically unique species do not have an elevated risk of decline, but in areas such as Australia and parts of Southeast Asia, both habitat loss and harvest are biased toward phylogenetically unique species. Enhanced conservation efforts, including a renewed focus on harvest sustainability, are urgently needed to prevent the deterioration of ecosystem function, especially in the South American and equatorial Asian tropics.

Indexed as

BiodiversityBiological EvolutionConservation of Natural ResourcesEcosystemAnimalsAsia, SoutheasternAustraliaExtinction, BiologicalForestsHuman ActivitiesHumansMammalsPhylogenySouth Americabushmeat huntingconservationhabitat lossharvestphylogenetic diversity

Identifiers

PMID33397807
PMCPMC7826328

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.