Author: Publisher:
ISBN:
Category : Forest products
Languages : en
Pages : 20
Book Description
Wood Product Flows and Market Structure in the Rocky Mountain States
Publications of the Rocky Mountain Forest and Range Experiment Station 1980-1989
Author: Publisher:
ISBN:
Category : Forests and forestry
Languages : en
Pages : 304
Book Description
Resource Bulletin RM.
Author: Rocky Mountain Forest and Range Experiment Station (Fort Collins, Colo.)Publisher:
ISBN:
Category : Forests and forestry
Languages : en
Pages : 318
Book Description
USDA Forest Service Resource Bulletin RM.
Author: Publisher:
ISBN:
Category : Forests and forestry
Languages : en
Pages : 350
Book Description
Research Paper RMRS
Author: Publisher:
ISBN:
Category : Forests and forestry
Languages : en
Pages : 180
Book Description
Optimum Timeframes for Detecting Songbird Vocalizations in the Black Hills
Author: Todd R. MillsPublisher:
ISBN:
Category : Birdsongs
Languages : en
Pages : 392
Book Description
Birds are indicators of vegetation structure and ecological conditions. The singing activity of birds declines during late-morning periods, which can affect estimates of abundance and conclusions regarding vegetative conditions indexed by birds. Therefore, it is important to quantify periods of bird activity so biologists can plan studies. We determined hourly detections from singing males of 22 nongame bird species in ponderosa pine, quaking aspen, and grassland vegetation types in the Black Hills of South Dakota. Detections of 12 of 22 species differed among 1-hr intervals after sunrise. Detections of yellowrumped warblers, Townsend's solitaires, red-breasted nuthatches, western tanagers, and American robins decreased on count-episodes more than 4 hrs after sunrise. Detections of dusky flycatchers declined on count-episodes more than 3 hrs after sunrise and detections of black-capped chickadees were greatest during the first hour after sunrise and declined afterward. Detections of many other species from songs or calls decreased on count-episodes more than 5 hrs after sunrise. We recommend that bird counts in the Black Hills be completed within 4 hrs after sunrise so estimates of bird abundance are not affected by reduced singing among males.
Net Economic Value of Cold and Warm Water Fishing in Idaho
Author: Cindy Sorg SwansonPublisher:
ISBN:
Category : Conifers
Languages : en
Pages : 280
Book Description
General Technical Report RM.
Author: Publisher:
ISBN:
Category : Forests and forestry
Languages : en
Pages : 760
Book Description
Monthly Catalogue, United States Public Documents
Author: Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1140
Book Description
Monthly Catalog of United States Government Publications
Author: Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 956
Book Description