Skip to content. | Skip to navigation

You are here: Home Our Resources Literature Carnivores, urban lan...

Carnivores, urban landscapes, and longitudinal studies: a case history of black bears

Author: Jon P. Beckmann, Carl W. Lackey
Date: Fall 2008
Periodical: Human-Wildlife Conflicts
Abstract: As urban landscapes expand across the globe, it becomes imperative to understand how these landscapes affect large carnivore populations. We examined the effects of human-altered landscapes on age-specific fecundity and life history parameters for female black bears(Ursus americanus) in urban and wildland regions in the northern Sierra Nevada Mountains of Nevada, including the Lake Tahoe Basin. We followed 12 marked female bears in an urban environment and 10 females in wildland habitats from 1997–2006. Our results show that female bears in urban areas have higher age-specific fecundity rates than did wildland female bears. Despite this difference, female bears in urban areas never realized this putative gain in fitness because they experienced higher age-specific mortality rates, leading to the creation of sinks (. = 0.749). Urban bears of the Lake Tahoe Basin are unable to repopulate vacated wildland areas.
View: Carnivores, urban landscapes.....pdf


Personal tools

powered by Southern Regional Extension Forestry