Download or read book Germination of Red Alder Seed written by M. A. Radwan and published by . This book was released on 1981 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Germination and First year Survival of Red Alder Seedlings in the Central Coast Range of Oregon written by Sybille Haeussler and published by . This book was released on 1987 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt: The role of disturbance in seed germination and first-year survival of red alder (Alnus rubra) was studied over two growing seasons at four sites representing a climatic gradient within the central Coast Range of Oregon. Disturbance affected red alder seed germination and seedling establishment by altering the temperature and moisture properties of the seedbed, improving light conditions, and disrupting the activities of predators and pathogens. Seedling emergence did not differ significantly between recent clearcuts and adjacent unlogged forests but was higher on disturbed mineral soil seedbeds than on undisturbed organic seedbeds. In clearcuts, mean emergence on disturbed seedbeds ranged from 7 to 65 percent of viable seed sown and was positively correlated (r2 = 0.70) with spring soil moisture conditions across the climatic gradient. On disturbed forest seedbeds, emergence ranged from 23 to 57 percent and did not appear to be limited by soil moisture. Emergence on undisturbed seedbeds averaged below 10 percent except when seedbeds remained near saturation levels and light was not limiting. In the absence of forest disturbance, light conditions play an important role in controlling seed germination. Laboratory and field experiments demonstrated that germination is inhibited by light conditions in the forest understory. Broad-leaved trees such as red alder inhibit germination more than conifers because they filter out red light and increase the proportion of far-red light. Understory vegetation and litter layers have an additional inhibitory effect. Alder seed is subject to heavy losses from seed predators and pathogens. Predation by small mammals and birds averaged 54 to 77 percent. Although vertebrate predation was higher on disturbed seedbeds, losses to invertebrates and pathogens averaged more than three times higher on undisturbed seedbeds. A small percentage of seeds remained viable for more than one year, but longer-term seed storage seems unlikely. Rates of first-year seedling establishment observed in the study reflected natural patterns of red alder abundance in the Coast Range. During the two years of the study, no seedlings survived at the two sites on the Interior slopes of the Coast Range. At the two Coastal sites, survival averaged between 3 and 30 percent on clearcuts but was 2 percent or less in forests. Best survival occurred on a sheltered north-facing clearcut. Survival on undisturbed seedbeds was equal to or greater than that on disturbed seedbeds.
Download or read book Germination of Red Alder Seed written by M. A. Radwan and published by . This book was released on 1981 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Germination of Red Alder Alnus Rubra Seed from Several Locations in Its Natural Range written by D. M. Elliott and published by . This book was released on 1981 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Red Alder written by Robert Leslie Deal and published by . This book was released on 2006 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt: In March 23-25, 2005, an international symposium on red alder was held at the University of Washington Center for Urban Horticulture in Seattle, WA. The symposium was entitled S2Red alder: A State of KnowledgeS3 and brought together regional experts to critically examine the economic, ecological and social values of red alder. The primary goal of the symposium was to discuss new advances in the understanding of red alder biology and silviculture, changing market and nonmarket values, and the current regulatory climate for management of alder. This proceedings includes 14 papers based on oral presentations given at the symposium. These papers highlight some of the key findings from the history, ecology, biology, silviculture and economics sessions presented at the red alder symposium.
Download or read book Seedfall Germination and Early Survival of Red Alder written by Scott Jeffrey Lewis and published by . This book was released on 1985 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Silvical Characteristics of Red Alder written by Norman P. Worthington and published by . This book was released on 1957 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Red Alder written by Constance A. Harrington and published by . This book was released on 1984 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Woody Plant Seed Manual Agriculture Handbook 727 July 2008 written by and published by . This book was released on 2009 with total page 1240 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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:
Download or read book Utilization and Management of Alder written by Pacific Northwest Forest and Range Experiment Station (Portland, Or.) and published by . This book was released on 1978 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Production and Assessment of Red Alder Planting Stock written by and published by . This book was released on 1992 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Biology and Management of Red Alder written by David E. Hibbs and published by . This book was released on 1994 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt: Red Alder, the Northwest's most common hardwood, is of increasing biological and economic importance to the region. This timely study examines current knowledge about red alder and its role in Northwest forests.
Download or read book USDA Forest Service General Technical Report PNW written by and published by . This book was released on 1978 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book General Technical Report PNW GTR written by and published by . This book was released on 2006 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effects of Fertilization on Growth and Foliar Nutrients of Red Alder Seedlings written by M. A. Radwan and published by . This book was released on 1987 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
