HABITAT-MEDIATED VARIATION IN PREDATION RISK BY THE AMERICAN MARTEN
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Open Access
Abstract
The probability of prey encounter, attack, capture, and kill are often hypothesized to depend on habitat structure, but field evidence in terrestrial systems is rare. We tested whether predation efficiency by the American marten (Martes americana) and fear of predation by their primary prey, the red‐backed vole (Clethrionomys gapperi), differed between 20‐ to 50‐year‐old regenerating forest stands and older uncut stands. Our results showed that the frequency of prey encounter, prey attack, and prey kill were higher in old uncut forests, despite the fact that small‐mammal density was similar to that in younger logged forests. These differences in predation efficiency were linked to higher abundance of coarse woody debris, which seems to offer sensory cues to martens, thereby increasing the odds of hunting success. Red‐backed voles in regenerating forest stands exhibited increased wariness compared to voles living in old uncut forest, suggestive of a behavioral response to habitat‐mediated variation in predation risk.Keywords
This publication has 36 references indexed in Scilit:
- Small mammals in young forests: implications for management for sustainabilityForest Ecology and Management, 2001
- The association of small mammals with coarse woody debris at log and stand scalesForest Ecology and Management, 2000
- Associations of Forest-Floor Vertebrates with Coarse Woody Debris in Managed Forests of Western OregonThe Journal of Wildlife Management, 2000
- Habitat complexity modifies the impact of piscivores on a coral reef fish populationOecologia, 1998
- Coarse woody debris in sub-boreal spruce forests of west-central British ColumbiaCanadian Journal of Forest Research, 1998
- Small Mammals in Managed, Naturally Young, and Old‐Growth ForestsEcological Applications, 1995
- Patch use as an indicator of habitat preference, predation risk, and competitionBehavioral Ecology and Sociobiology, 1988
- Optimal Foraging by Largemouth Bass in Structured EnvironmentsEcology, 1984
- Winter Diet and Habitat Selection of Marten in Yosemite National ParkThe Journal of Wildlife Management, 1984
- Habitat Structural Complexity and the Interaction Between Bluegills and Their PreyEcology, 1982