Cited by 618Wildlife Ecology and ConservationEcology and Vegetation Dynamics StudiesSpecies Distribution and Climate Change

Human Population Density and Extinction Risk in the World's Carnivores

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Cardillo, Marcel, Purvis, Andy, Sechrest, Wes, Gittleman, John L, Bielby, Jon, Mace, Georgina M·2004·PLoS Biology

Abstract

Understanding why some species are at high risk of extinction, while others remain relatively safe, is central to the development of a predictive conservation science. Recent studies have shown that a species' extinction risk may be determined by two types of factors: intrinsic biological traits and exposure to external anthropogenic threats. However, little is known about the relative and interacting effects of intrinsic and external variables on extinction risk. Using phylogenetic comparative methods, we show that extinction risk in the mammal order Carnivora is predicted more strongly by biology than exposure to high-density human populations. However, biology interacts with human population density to determine extinction risk: biological traits explain 80% of variation in risk for carnivore species with high levels of exposure to human populations, compared to 45% for carnivores generally. The results suggest that biology will become a more critical determinant of risk as human populations expand. We demonstrate how a model predicting extinction risk from biology can be combined with projected human population density to identify species likely to move most rapidly towards extinction by the year 2030. African viverrid species are particularly likely to become threatened, even though most are currently considered relatively safe. We suggest that a preemptive approach to species conservation is needed to identify and protect species that may not be threatened at present but may become so in the near future.

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  • These concentrations occur mostly in heavily populated regions such as tropical Asia.

    “They occur mostly in heavily populated regions such as tropical Asia, where major ongoing biodiversity losses are well known (10, 13–15, 30, 46, 52, 53).”
  • Species at the brink have been pushed to a critical conservation status because of human activities, where habitat loss and fragmentation, illegal trade, overexploitation, introduced domestic and wild species, toxification, and pollution have played a major role.

    “Fourth, species at the brink have been pushed to a critical conservation status because of human activities, where habitat loss and fragmentation, illegal trade, overexploitation, introduced domestic and wild species, toxification, and pollution have played a major role (10, 13–15, 30, 46, 52, 53).”

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Research works printed but not linked: 1

  1. Gittleman JL Funk SM Macdonald DW Wayne RK Carnivore conservation 2001 Cambridge Cambridge University Press 690

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Authors
Cardillo, M., Purvis, A., Sechrest, W., Gittleman, J. L., Bielby, J., & Mace, G. M.
Affiliations
  • Zoological Society of London (GB)
  • Imperial College London (GB)
  • Conservation International (US)
  • University of Virginia (US)
Corresponding author
Cardillo, Marcel
Venue
PLoS Biology
Published
2004-07-13
Volume
2
Issue
7
Pages
e197
ISSN
  • 1544-9173 (ISSN-L)
  • 1545-7885
OpenAlex
W1966746022
Cited by
618
References
33
Citations by year
2026: 19 · 2025: 24 · 2024: 28 · 2023: 46 · 2022: 41 · 2021: 40 · 2020: 28 · 2019: 37 · 2018: 26 · 2017: 23 · 2016: 32 · 2015: 29 · 2014: 29 · 2013: 20 · 2012: 23
FWCI
12.53
Type
journal article
Language
en
Open access
Locations
  • PLoS Biology (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • UCL Discovery (University College London) (submittedVersion)
  • Figshare (submittedVersion, cc-by)
  • ANU Open Research (Australian National University) (submittedVersion, cc-by)
Funders
  • National Science Foundation (0129009)
  • Natural Environment Research Council
Topics
  • Physical Sciences › Environmental Science › Ecology › Wildlife Ecology and Conservation
  • Physical Sciences › Environmental Science › Nature and Landscape Conservation › Ecology and Vegetation Dynamics Studies
  • Physical Sciences › Environmental Science › Ecological Modeling › Species Distribution and Climate Change
Keywords
extinction risk, human population density, Carnivora, carnivores, anthropogenic threats, conservation prioritization, phylogenetic comparative analysis
MeSH terms
Animals, Carnivora, Conservation of Natural Resources, Ecology, Environment, Biological Evolution, Humans, Mammals, Models, Biological, Phylogeny, Population Density, Population Dynamics, Regression Analysis, Risk, Species Specificity, Models, Statistical, Ecosystem, Biodiversity

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