by Agricultural Research Service, U.S. Dept. of Agriculture in Berkeley .
Written in English
Includes bibliographical references.
|Statement||by Fred Lavin and Thomas N. Johnsen.|
|Series||ARS-W -- 29|
|Contributions||Johnsen, Thomas N., United States. Agricultural Research Service. Western Region|
|The Physical Object|
|Pagination||5 p. ;|
Pinyon-juniper habitats are expanding into savannah, grassland, and shrub steppe areas in the intermountain west (West et al. ). Tree densities in pinyon-juniper habitats have increased in the past years at the expense of the formerly more abundant shrub and herbaceous understory (West et . For planning management and treatment there are three types of woodland sites. 1. Sites where all the trees should be removed to delay the rate of treeSites where all the trees should be removed to delay the rate of tree re-establishment as much as possible. This is about 20% of the total current woodland Size: 4MB. The spatial distribution of studies was not uniform, with a high density of studies in north-central New Mexico and Arizona. There were gaps in research effort in southern California for P. monophylla, northeastern New Mexico for P. edulis and J. monosperma, Wyoming and southeastern Idaho for J. osteosperma, and numerous areas for J. scopulorum outside of hotspots in the southwestern United Cited by: 1. The study was located in Smith Valley (lat 39°26′30″ to 39°25′0″ north to south; long °59′0″ to °56′15″ west to east), which is a small watershed located about 20 km north-northwest of Ely, Nevada (elevation from 2 m to 2 m; to mm precipitation; Fig. 1).Black sagebrush is the dominant shrub species in the project area and single-leaf pinyon and Utah Cited by: 6.
The rapid conversion of shrub steppe to western juniper woodlands (Burkhardt and Tisdale , Young and Evans , Miller and Rose ) has occurred across a wide variety of sage brush. PDF | Pinyon-juniper (PJ) plant communities cover a large area across North America and provide critical habitat for wildlife, biodiversity and | Find, read and cite all the research you need. Sagebrush Steppe: A Story of Encroachment and Invasion Summary Sagebrush steppe has been rapidly changing into woodlands of western juniper and pinyon pine since Euroamerican settlement of the West in the middle of the nineteenth century. The change from the dry scattered shrub and grasslandsFile Size: KB. Woody vegetation has expanded in coverage over the past century in many places globally, exemplified by pinyon-juniper changes in the Southwestern United States. Extreme drought is one of the few non-management drivers besides fire that might reverse such cover changes, but this has not been well documented. Here, we assess 68 years of tree cover dynamics across an elevation Cited by:
Succession in Pinyon-Juniper Vegetation in New Mexico Martin R. Schott and Rex D. Pieper Pinyon-juniper is a major vegetation complex of the southwestern United States. One-seed juniper and pinyon are the major species of the complex in central New Mexico. Since settlement of the Southwest by Europeans, this vege-. GENERAL BOTANICAL CHARACTERISTICS: California juniper is a native conifer that is adapted to xeric sites [35,36].As a seedling under 12 inches (30cm) in height, it is shade dependent .Its growth is crooked, forked, and multistemmed .Its branches are stiff with irregular stems .Its scalelike leaves are denticulate at the margins, glandular, pitted on the back, and bluntly pointed [22,25]. FORAGE SHRUB ADAPTATION TRIALS AT THREE PINYON-JUNIPER SITES By Fred Lavin and Thomas N. Johnsen, Jr.1 SUMMARY Initial growing season results of an adaptation study entailing greenhouse, nursery, and field investigations on 40 accessions of 15 forage shrub species are reported. Some plantings were started in the greenhouse, hardened in the. In overall planning for management of pinyon-juniper woodlands for more efficient livestock forage and browse production, use of range improvement practices, such as tree control and seeding, should be coupled with intensive grazing systems.