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Intensive hunting and forest fragmentation can jointly accelerate wildlife declines in tropical forests.

The Claim

In human-dominated landscapes, intensive hunting interacts synergistically with forest fragmentation to further threaten wildlife populations.

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The Short Version

Evidence supports the claim that intensive hunting can interact with forest fragmentation in ways that worsen wildlife declines beyond either pressure alone. The strongest direct studies show this in fragmented tropical forests, particularly Amazonian systems and Neotropical primates. However, broad global syntheses often confirm both threats separately without formally measuring synergy across all landscapes and taxa.

Caveats

  • "Synergistically" is a technical claim about more-than-additive effects; several cited sources show combined pressure but do not formally test that standard.
  • The strongest direct evidence comes from tropical forest fragments and specific taxa, so unqualified generalization to all human-dominated landscapes is broader than the best evidence.
  • Large-scale syntheses support hunting and fragmentation as major independent threats, but they do not yet quantify the interaction consistently across regions.

The Receipts

  1. Hunting and Forest Modification Have Distinct Defaunation Impacts on Tropical Mammals and Birds

    Frontiers in Forests and Global Change

  2. Bushmeat hunting and defaunation in tropical forests

    International Union for Conservation of Nature (IUCN)

  3. Global biodiversity: indicators of recent declines

    Nature

  4. Combined effects of land use and hunting on distributions of tropical mammals

    GLOBIO (PBL Netherlands Environmental Assessment Agency)

  5. Habitat fragmentation and species diversity in competitive communities

    Journal of Animal Ecology (via PubMed Central)

  6. Synergistic effects of habitat disturbance and hunting in Amazonian forest fragments

    University of East Anglia ePrints

  7. Synergistic effects of habitat fragmentation and hunting on extinction risk of Neotropical primates

    Biodiversity and Conservation (Springer)

  8. Hunting is a major threat to wildlife in tropical regions

    PBL Netherlands Environmental Assessment Agency

  9. Habitat fragmentation effects depend on complex interactions between population size and dispersal ability: Modeling influences of roads, agriculture and residential development

    USDA Forest Service Research & Development

  10. Nest Predators and Fragmentation: a Review and Meta-Analysis

    University of Wyoming

+ 8 more sources — see the full list on Lenz

Filed Under

Forest FragmentationHuntingWildlife Populations

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