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- A study in the State of North Carplina, U.S.A. demonstrated that large, permanent photo plots (400 hectares) can be used to monitor large regions of land by using remote sensing techniques. Estimates of area in a variety of land cover categories were made by photointerpretation of medium-scale aerial photography from a single month using 111 photo plots. Many of these area estimates compared favorably with the most recent data from the traditional forest inventory, although sampling errors of the new system are at least eight times larger due to the small sample size. The new system...AuthorsRaymond L. Czaplewski, Glenn P. Catts, Paul W. SnookKeywordsSourceGeneral Technical Report WO-39. Washington, DC: U.S. Department of Agriculture, Forest Service. p. 197-202.Year1987
- This study developed regional overstory-understory models for four forest types in southeastern Alabama and tested the ability of these models to predict understory vegetation using overstory data from southern and southwestern Alabama. Cross-sectional data from the USDA Forest Service Forest Inventory and Analysis Unit Multiresource Survey of Alabama was used to analyze the relationship between timber stand characteristics and herbaceous cover under planted pine, natural pine, mixed pine-hardwoods, and upland hardwoods. Herbaceous cover was significantly related to total growing stock...AuthorsLinda A. Joyce, R. L. BakerSourceForest Ecology and Management. 18(1): 49-59.Year1987
- Breeding birds were counted in 1982, 1983, and 1984 using the spot-map method on seven 8.1-ha plots In the Medicine Bow National Forest, Wyoming. At elevations of 2,280 to 3,000 m, riparian habitats were structurally simple, dominated by one or more bush willow species. Subalpine riparian avifaunas were depauperate with only four abundant species - song sparrow, white-crowned sparrow, Lincoln's sparrow, and Wilson's warbler. Habitat requirements overlapped among these species but differed significantly from randomly-sampled habitat in the same areas. Results indicated that species preferred...AuthorsDeborah M. FinchSourceIn: Troendle, Charles A.; Kaufmann, Merrill R.; Hamre, R. H.; Winokur, Robert P., tech. coords. Management of subalpine forests: Building on 50 years of research. Gen. Tech. Rep. RM-GTR-149. Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Forest and Range Experiment Station. p. 167-172.Year1987
- Two subalpine forest subdrainages of Deadhorse Creek, Colarado, USA were used to demonstrate the comparable impact on water yield of two tree-harvesting practices. Of the 40 ha North Fork subdrainage 36% was clearcut commercially using five-tree height circular openings. In contrast, 40% of the basal area on the 41 ha Unit 8 was removed by partial cutting in the first step of a three-step shelterwood cut.AuthorsC. A. Troendle, R. M. KingKeywordsSourceJournal of Hydrology. 90: 145-157.Year1987
- Aspen rings can be reliably counted without resorting to laboratory procedures by using a low-power microscope and simple field preparation of cores.AuthorsTodd T. Mowrer, Wayne D. ShepperdKeywordsSourceRes. Note RM-476. Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Forest and Range Experiment Station. 4 p.Year1987
- Bird-habitat relationships along a riparian gradient in southeastern Wyoming were examined from 1982 to 1984. Breeding birds were spot-mapped on ten study grids established over an elevational cline of 933 m. Habitat analyses indicated significant trends of decreasing vegetational complexity from low to high elevations, with declines in number of habitat layers, and increased dominance of shrub willow. To evaluate avian responses to these changes in habitat structure, I used three analytical approaches.AuthorsDeborah M. FinchKeywordsSourceLaramie, WY: University of Wyoming, Department of Zoology and Physiology. p. 162. Dissertation.Year1987
- The lark bunting (Calamospiza melanocorys) breeds in native grassland and shrubsteppe habitat from southern Alberta, Saskatchewan, and Manitoba; south to northwestern Texas and New Mexico, and east to Nebraska (Bailey and Niedrach 1965; Baumgarten 1968). In the northern Great Plains, lark buntings reach high populations in a zone extending from southeastern South Dakota to central Montana, then southerly through the shrubsteppe area of Montana and Wyomi ng into the shortgrass area of northeastern Colorado and the southwestern portion of the Nebraska panhandle (Kantrud 1982). Kantrud (1982)...AuthorsDeborah M. Finch, Stanley H. Anderson, Wayne A. HubertSourceBiological Report 82(10.137). Washington, DC: U.S. Department of the Interior, Fish and Wildlife Service. 16 p.Year1987
- Forest Inventory and Analysis units of the USDA Forest Service produce timber resource statistics every 8 to 10 years. Midcycle surveys are often performed to update inventory estimates. This requires timely identification of forest lands. There are several kinds of remotely sensed data that are suitable for this purpose. Medium scale color infrared aerial photography has the spatial resolution necessary to locate and identify forest land undergoing transition. This study examines the land cover and timber resource acreage classification results produced by the photointerpretation or 111,...AuthorsGlenn P. Catts, Noel D. Cost, Ray L. Czaplewski, Paul W. SnookKeywordsSourceIn: Everitt, James H.; Nixon, Paul R., editors. Color aerial photography and videography in the plant sciences and related fields. Proceedings of the Eleventh Biennial Workshop on Color Aerial Photography in the Plant Sciences. Hoblitzelle Auditorium, Agricultural Experiment Station, Weslaco, Texas, April 27- May 1, 1987. Bethesda, MD: American Society for Photogrammetry and Remote Sensing. p. 39-52.Year1987
- The 1987 National Silviculture Workshop was held in Sacramento, California, and the Eldorado National Forest. The purpose of the workshop was to discuss, review, and share information and experiences regarding how silviculture can serve as the tool to help accomplish the objectives of many resources.AuthorsMelanie Malespin Woolever, Mike Smith, Elizabeth McGraw, Mike Lanasa, Arthur C. Zack, Chris Reichert, Robert MacWhorter, Michael R. Lennartz, Richard A. Lancia, Marc G. Rounsaville, James R. Sedell, Fred H. Everest, David R. Gibbons, Stephen R. Shifley, Melinda Moeur, David A. Marquis, Richard O. Fitzgerald, Nelson Loftus, Thomas C. Turpin, William R. Terrill, Glenn L. Crouch, Wayne D. Shepperd, Edith W. Petrick, John J. Petrick, Roger W. Dennington, Allan W. Ashton, Hubertus J. Mittmann, Gary Thompson, Ken Sonksen, David A. Stark, Michael A. Ware, Allan J. West, Patrick D. Jackson, Richard L. Bassett, Jimmie D. Chew, William B. White, Bruce W. Morse, Mike Znerold, Russell T. Graham, Peyton W. Owston, Richard G. Miller, John R. Nesbitt, Gaston Porterie, Ernest Del RioKeywordsSourceWashington, D.C.: U.S. Department of Agriculture, Forest Service, Timber Management. 322 p.Year1987
- Summarizes the objectives, prescriptions, and techniques used in prescribed burning beneath the canopy of ponderosa pine stands, and stands of ponderosa pine mixed with western larch, Douglas-fir, and grand fir. Information was derived from 12 districts in two USDA Forest Service Regions and seven National Forests in Montana and Oregon.AuthorsBruce M. Kilgore, George A. CurtisKeywordsSourceGeneral Technical Report INT-233. Ogden, UT: U.S. Department of Agriculture, Forest Service, Intermountain Research Station. 39 p.Year1987