Global camera trap synthesis highlights the importance of protected areas in maintaining mammal diversity

Cheng Chen, Jedediah F. Brodie, Roland Kays, T. Jonathan Davies, Runzhe Liu, Jason T. Fisher, Jorge Ahumada, William McShea, Douglas Sheil, Bernard Agwanda, Mahandry H. Andrianarisoa, Robyn D. Appleton, Robert Bitariho, Santiago Espinosa, Melissa M. Grigione, Kristofer M. Helgen, Andy Hubbard, Cindy M. Hurtado, Patrick A. Jansen, Xuelong JiangAlex Jones, Elizabeth L. Kalies, Cisquet Kiebou-Opepa, Xueyou Li, Marcela Guimarães Moreira Lima, Erik Meyer, Anna B. Miller, Thomas Murphy, Renzo Piana, Rui Chang Quan, Christopher T. Rota, Francesco Rovero, Fernanda Santos, Stephanie Schuttler, Aisha Uduman, Joanna Klees van Bommel, Hilary Young, A. Cole Burton

Research output: Contribution to journalLetterpeer-review

33 Scopus citations


The establishment of protected areas (PAs) is a central strategy for global biodiversity conservation. While the role of PAs in protecting habitat has been highlighted, their effectiveness at protecting mammal communities remains unclear. We analyzed a global dataset from over 8671 camera traps in 23 countries on four continents that detected 321 medium- to large-bodied mammal species. We found a strong positive correlation between mammal taxonomic diversity and the proportion of a surveyed area covered by PAs at a global scale (β = 0.39, 95% confidence interval [CI] = 0.19–0.60) and in Indomalaya (β = 0.69, 95% CI = 0.19–1.2), as well as between functional diversity and PA coverage in the Nearctic (β = 0.47, 95% CI = 0.09–0.85), after controlling for human disturbances and environmental variation. Functional diversity was only weakly (and insignificantly) correlated with PA coverage at the global scale (β = 0.22, 95% CI = −0.02–0.46), pointing to a need to better understand the functional response of mammal communities to protection. Our study provides important evidence of the global effectiveness of PAs in conserving terrestrial mammals and emphasizes the critical role of area-based conservation in a post-2020 biodiversity framework.

Original languageEnglish
Article numbere12865
JournalConservation Letters
Issue number2
StatePublished - Mar 1 2022


  • camera trap
  • functional diversity
  • human accessibility
  • human footprint
  • mammal diversity
  • protected area
  • species richness
  • taxonomic diversity


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