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Book An Engelmann Spruce Seed Source Study in the Central Rockies

Download or read book An Engelmann Spruce Seed Source Study in the Central Rockies written by Wayne D. Shepperd and published by . This book was released on 1981 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: Planted Englemann spruce seedlings from 20 sources throughout North America were field tested in the central Rockies at 9,600 feet (2,930 m) elevation. Overall survival was 73% after 10 years. Significant differences in height were evident among several sources. Sources from northern latitudes and lower elevations grew best. The results demonstrate that Englemann spruce planted at high elevations can survive when proper planting techniques and yearly maintenance procedures are used.

Book Engelmann Spruce Seed Dispersal in the Central Rocky Mountains

Download or read book Engelmann Spruce Seed Dispersal in the Central Rocky Mountains written by Robert R. Alexander and published by . This book was released on 1983 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Research Paper RM

Download or read book Research Paper RM written by and published by . This book was released on 1986 with total page 466 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Silvical Characteristics of Engelmann Spruce

Download or read book Silvical Characteristics of Engelmann Spruce written by Robert R. Alexander and published by . This book was released on 1984 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Ecology Silviculture and Management of the Engelmann Spruce subalpine Fir Type in the Central and Southern Rocky Mountains

Download or read book Ecology Silviculture and Management of the Engelmann Spruce subalpine Fir Type in the Central and Southern Rocky Mountains written by Robert R. Alexander and published by . This book was released on 1987 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Silvics of North America Conifers

Download or read book Silvics of North America Conifers written by Russell M. Burns and published by . This book was released on 1990 with total page 686 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Silvics of North America

Download or read book Silvics of North America written by Russell M. Burns and published by . This book was released on 1990 with total page 688 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book General Technical Report RM

Download or read book General Technical Report RM written by and published by . This book was released on 1976 with total page 710 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book The Woody Plant Seed Manual

Download or read book The Woody Plant Seed Manual written by United States. Forest Service and published by Forest Service. This book was released on 2008 with total page 1240 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Interspecific and Intraspecific Variation in Picea Engelmannii and Its Congeneric Cohorts

Download or read book Interspecific and Intraspecific Variation in Picea Engelmannii and Its Congeneric Cohorts written by G. E. Rehfeldt and published by . This book was released on 2004 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: A series of common garden studies of 336 populations representing Picea engelmannii, P. pungens, P. glauca, P. mexicana, and P. chihuahuana provided as many as 13 growth and morphologic characters pertinent to biosystematics and genecology. Canonical discriminant analyses discretely segregated populations of P. pungens and P. chihuahuana while positioning P. engelmannii populations along a continuum anchored by Southwestern United States populations at one extreme and those classified as hybrids of P.engelmannii with P. glauca on the other. A population of P. mexicana was closely aligned with Southwest populations of P. engelmannii, while populations of P. glauca were intermixed with and peripheral to those identified as hybrid. While consistent with most taxonomic treatments of these taxa, the analyses nonetheless suggested that Southwestern United States populations should be considered as a variety of P. engelmannii that most likely should include P. mexicana. Genecological analyses detected ample genetic variation among the 295 populations in the P. engelmannii complex. The analyses demonstrated that populations were distributed along clines driven primarily by the winter temperature regime of the provenance. For northern populations, summer temperatures also became a key factor in accounting for genetic differences among populations. Analyses also detected clines for the 19 P. pungens and 23 P. glauca populations. An assessment of the effects of global warming according to the IS92a scenario of two general circulation models demonstrated for the current century: (1) an increasingly favorable climate for P. pungrens as its distribution moves upward in elevation throughout much of the Great Basin, Colorado Rockies, and mountain islands of the Southwest; (2) a widespread reduction in the areal extent of P. engelmannii in the inland Northwestern United States to the extent that Picea may become rare in the local flora; (3) extirpation of P. glauca from the Black Hills and Cypress Hills; and (4) a widespread redistribution of genotypes across the landscape as contemporary populations adjust genetically to change.