Moose

 Resource Brief - March 2009

Importance/Issues

Moose (Alces alces) are an integral component of terrestrial systems in ALAG, ANIA, KATM, and LACL. During cycles of high abundance, this species has the potential to influence structure and function of terrestrial systems both through its browsing effects on vegetational communities and through its role as a prey species. Thus, tracking abundance and distribution of moose provides important information on dynamics of terrestrial systems. Further, the bull:cow ratio is useful for monitoring their reproductive potential. Moose also are an important subsistence and cultural resource to local Native Alaskans and provide significant recreational opportunities for resident hunters. Changes in numbers and distribution of moose are anticipated in response to climateinduced changes in their habitats.

NPS staff have worked in cooperation with ADF&G to conduct annual fall surveys of moose in established trend count areas (TCAs) since the 1970s. However, aerial surveys of moose TCAs sometimes lacked consistent application of methods and did not account for sightability. More rigorous surveys are needed to minimize sampling error and enhance comparability of long-term data for the purpose of managing moose harvest and understanding plant-herbivore-predator interactions.

Current and Future Work Efforts

Monitoring for moose for SWAN park units is scheduled for 2010.