Bird-Habitat Associations at Five National Park Units in Southern Oregon and Northern California.

摘要

As part of the Inventory and Monitoring Program of the National Park Service, the Klamath Network and Klamath Bird Observatory established a protocol to monitor long-term trends in landbird populations at National Park units in southern Oregon and northern California. This report uses data from the first sequence of surveys to examine bird-habitat associations at the five larger park units in the network: Crater Lake National Park, Lassen Volcanic National Park, Lava Beds National Monument, Redwood National and State Parks, and Whiskeytown National Recreation Area. These parks include a diversity of ecosystems from high elevation coniferous forest to shrub-steppe, temperate rainforest, chaparral, and oak woodlands. At each park 2535 sites were established using a stratified random approach that consisted of 3 designated sampling frames. Breeding season point counts were conducted at each park from 20082010, along with collection of vegetation data. For this analysis we estimated breeding density of 39 bird species (816 species per park) in Program DISTANCE.