What the study found
Forest degradation changed vertebrate scavenger assemblages in the Tumbesian seasonally dry tropical forest. Degraded habitats had fewer scavenger species, but carcass removal stayed high.
Why the authors say this matters
The authors conclude that vertebrate scavengers are important for nutrient cycling, organic matter decomposition, and disease regulation, and that conserving well-preserved forests is essential to sustain biodiversity and long-term food web stability. They say the findings provide the first empirical evidence of how degradation reshapes scavenger dynamics in this threatened ecosystem.
What the researchers tested
The researchers deployed 60 chicken carcasses and monitored them with camera traps during the dry season in southern Ecuador. They compared scavenging across three forest degradation states: Semi-natural, Shrub-dominated, and Arid land.
What worked and what didn't
They recorded 13 vertebrate scavenger species, with estimated richness reaching 17 species. Semi-natural forests had the highest richness and diversity, including species absent from degraded habitats such as the king vulture and white-tailed jay; degraded habitats were dominated by generalists, especially the Sechuran fox, which scavenged nearly half of all carcasses and significantly accelerated carrion removal. Carcass persistence was shorter in degraded habitats (1.2–1.8 days) than in Semi-natural forests (3.8 days).
What to keep in mind
The study was done during one dry season in one region of southern Ecuador, so the available summary describes a limited scope. The abstract does not describe additional limitations.
Key points
- The study compared scavenging across Semi-natural, Shrub-dominated, and Arid land forests in southern Ecuador.
- Thirteen vertebrate scavenger species were recorded, and estimated richness reached 17 species.
- Semi-natural forests had the highest scavenger richness and diversity, including species absent from degraded habitats.
- The Sechuran fox scavenged nearly half of all carcasses and was linked to faster carrion removal.
- Carcass persistence was shorter in degraded habitats than in Semi-natural forests.
Disclosure
- Research title:
- Forest degradation reduces scavenger diversity but not carrion removal
- Authors:
- Adrian Orihuela-Torres, L Naves-Alegre, Eneko Arrondo, Darío Alexander Nole-Nole, Freddy Gutierrez-Morillo, Carlos Iván Espinosa, Juan Manuel Pérez-García
- Institutions:
- Universitat de Miguel Hernández d'Elx, University of Alicante, Universidad de Granada, Universidad Técnica Particular de Loja
- Publication date:
- 2026-02-23
- OpenAlex record:
- View
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