PARENT SESSION

Conservation 3 -- Session Chair: Patrick Kelly-- University Center, Kate Buchanan Room

HABITAT ASSOCIATIONS AND MODEL EVALUATION FOR AMERICAN MARTEN IN SEQUOIA AND KINGS CANYON NATIONAL PARKS. Rebecca E. Green and Matthew D. Johnson. Dept Wildlife, Humboldt State University, 1 Harpst Street, Arcata, CA, USA.

ABSTRACT- Wildlife-habitat models can predict presence and absence of species of conservation concern and are important tools for land managers. Their utility, however, hinges on their accuracy in places and times that often extend beyond the scope of the empirical data or expert opinion used to create the models. Independent model evaluation studies are therefore very important, but relatively rare. Here, we report findings from a study evaluating a California-wide model (called CWHR) used to predict American marten (Martes americana) occurrence in Sequoia and Kings Canyon National Parks. In order to better understand the current distribution of forest carnivores within park boundaries, surveys using sooted track plates and remote cameras were conducted in the parks during the summers of 2002 and 2003. Sites surveyed included a variety of habitat types and elevations ranging from 2,500 to 11,200 feet. Marten were detected at 20 of 60 sites in five habitat types, from 6,000 to 10,000 feet in elevation. The model was relatively accurate; overall it correctly classified 76-84% of the sites. We offer suggestions to make the model more accurate within the parks, and we comment on the importance of these national parks to provide reserves of relatively pristine habitat for regional conservation.

KEY WORDS: Martes americana, occurrence, habitat selection, distribution