In Waterton Lakes National Park, grizzly bears are used as an umbrella species representing wildlife that are sensitive to human disturbance, whereas the status of secure habitat is used as a surrogate measure for assessing cumulative effects. The status of grizzly bear habitat is therefore considered to be a landscape level indicator of the ecological integrity in Waterton Lakes National Park and the significantly larger regional ecosystem upon which this wide ranging species depends. The Sensitive Species Secure Habitat measureassesses the percent of available grizzly bear habitat in Waterton Lakes National Park; this assessment is based on digital elevation models, remote sensing data, and human activity trail counters.