Download or read book Effects of Mechanized Thinning and Prescribed Fire on Stand Health Productivity and Ecophysiology in Eastern Sierra Nevada Jeffrey Pine written by Robert M. Fecko and published by . This book was released on 2007 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Influences of Mechanized Thinning and Prescribed Fire on Natural Regeneration and Understory Vegetation in an Uneven aged Jeffrey Pine Stand written by Wade G. Salverson and published by . This book was released on 2010 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt: The application of thinning and prescribed fire treatments to meet forest management objectives necessitates a comprehensive understanding of the implications for a host of forest attributes. Thinnings using cut-to-length and whole-tree harvesting systems followed by prescribed underburning were assessed for their effects on seedling and sapling demography as well as shrub, forb, and grass understory species in a second growth, uneven-aged Jeffrey pine stand containing a minor component of California white fir. Initial seedling and sapling populations were quantified early in the first growing season immediately of lowing implementation of the thinning treatments and again four years later approximately three years after prescribed fire implementation. Depression of seedling counts due to forest floor disturbance associated with the thinning operations was followed by a recovery largely confined to Jeffrey pine regeneration in the whole-tree treatment where final seedling counts exceeded those found initially. The postburn substrate was more favorable for the establishment of Jeffrey pine than white fir seedlings, and the largest increase overall in seedling counts between the initial and final inventories occurred in the burned portion of the whole-tree treatment. Live sapling losses from thinning were greatest in the cut-to-length treatment, while underburning induced complete mortality within this size class. For understory vegetation, a mixed shrub-dominated composition featuring antelope bitterbrush with mules ears as the only forb and Sandberg bluegrass the most prominent among sparse grasses was inventoried such that both percent cover and dry weight by species were revealed. Five growing seasons after thinning and four after underburning, this inventory was repeated. Bitterbrush was reduced by approximately two-thirds in the cut-to-length treatment and by one-half in the whole-tree treatment in comparison to that in the unthinned control at the final inventory. For the cut-to-length treatment, a similar reduction in mules ears was noted, but that in the whole-tree treatment was somewhat less for this species. Bluegrass was reduced by approximately one-half in the former treatment and by three-fourths in the latter. Prescription fire reduced bitterbrush to less than one-tenth and mules ears to approximately one-half of that in the unburned treatment, but bluegrass prevalence was more than 10X greater in the burned than in the unburned treatment. Results presented here provide land managers insight into the impacts of six combinations of thinning and burning treatment on natural regeneration and understory community development in eastern Sierra Nevada Jeffrey pine and similar dry site forest types.
Download or read book Effects of Thinning and Prescribed Burning on Tree Resistance to Extreme Drought in a Sierra Nevada Mixed conifer Forest California USA written by Chance C. Callahan and published by . This book was released on 2019 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: Drought-induced tree mortality can drastically alter forest composition, structure, carbon dynamics, and ecosystem function. Increasingly, forest policy and management focuses on how to improve forest resistance and resilience to drought stress. This study used tree ring data at Teakettle Experimental Forest (TEF), a historically frequent fire mixed-conifer forest in the California Sierra Nevada, to quantify how prescribed fire and mechanical thinning conducted in 2001-2002 influenced stand and tree-level growth responses to the extreme California drought of 2012-2016. Overstory thinning and understory thinning significantly enhanced growth responses to treatments alone and treatments during the drought at the stand-level. In each year of the drought, distinct tree species were the only significant predictors of drought resistance at the stand-level. As drought persisted, shade-intolerant pine species yielded greater drought resistance values than shade-tolerant white fir and incense cedar. No prescribed burn effects were found, likely due low fire intensity. At the tree-level, tree diameter (DBH), tree height (HT), crown ratio (CRNR), topographic position index (TPI), and change in growing space over time (competition) were the most important predictors of growth responses to treatments and drought resistance. Mechanical thinning, in both understory and overstory thinning can enhance mixed-conifer forests ability to resist drought by reducing competition and increasing resource availability. This study suggests forest managers have flexibility in prescribing various thinning intensities to promote drought resistance. Prescribed burn effects were not found in this study, but further research is needed to understand long-term burn effects for promoting drought resistance in Sierra Nevada mixed-conifer forests.
Download or read book The Effects of Thinning and Similar Stand Treatments on Fire Behavior in Western Forests written by and published by . This book was released on 1999 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Thinning and Prescribed Fire and Projected Trends in Wood Product Potential Financial Return and Fire Hazard in Montana written by R. James Barbour and published by . This book was released on 2004 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Stand fuel and potential fire behavior characteristics in an irregular south eastern Arizona ponderosa pine stand written by Michael G. Harrington and published by . This book was released on 1982 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: Arizona's natural ponderosa pine stands are characterized by open, mature groups and adjacent closed, dense thickets. The open structure of the mature groups permits a warm, dry environment, resulting in very low fuel moisture during much of the fire season and creating high ignition and fire spread potentials in the abundant fuels. The large woody fuel component of the adjacent closed groups contributes to a high crown fire potential in the low, dense sapling crowns. These findings suggest a need for fuel management activities where values-at-risk are high.
Download or read book The Lasting Effects of Prescribed Fire and Harvesting on Forest Floor and Soil Nutrients in the Eastern Sierra Nevada Mountains written by Lauren Marie Roaldson and published by . This book was released on 2013 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Esthetic Effects of Prescribed Burning written by Linda Mahaffey Anderson and published by . This book was released on 1982 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Impact of Prescribed Fire on Understory and Forest Floor Nutrients written by Walter A. Hough and published by . This book was released on 1981 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: The impact of low-intensity prescribed fires on slash pine/saw-palmetto/gallberry understory and forest floor nutrients was estimated from measurements before and after burning. Highly significant correlations existed between weight loss of these fuel components and the weight loss of several elements. Energy loss was also highly correlated with forest floor and understory weight loss. The data also indicate that annual or biennal burns do not reduce themacronutrients in the soil surface layer, but, in fact, increase them; and that even though a significant amount of N (110kg/ha) may be lost by burning a 5-year fuel accumulation there still is 160 kg/ha of N in the ash and residue following the fire, as well as about 700 kg/ha in the upper 10 cm of the soil profile.
Download or read book Multiresource Effects of a Stand replacement Prescribed Fire in the Pinus Contorta Abies Lasiocarpa Vegetation Zone of Central Washington written by Arthur R. Tiedemann and published by . This book was released on 2002 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effects of Prescribed Fire on Site Productivity written by S. B. Lindeburgh and published by . This book was released on 1990 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: Report on the ecological effects of prescribed fire and in particular, the effects on the soil resource, including organic matter, nutrients, soil acidity, temperature, and post-burn productivity.
Download or read book The Effect of Fire on Vegetation in Ponderosa Pine Forests written by Henry A. Wright and published by . This book was released on 1978 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effects of Prescribed Fire on Soil Nitrogen Levels in a Cutover Douglas fir western Larch Forest written by Martin F. Jurgensen and published by . This book was released on 1981 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Wildland Fire in Ecosystems written by and published by . This book was released on 1998 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fire Effects Guide written by and published by . This book was released on 1994 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Analysis of Fuel and Stand Density Reduction Following Prescribed Fire in a Ponderosa Pine Stand in California s Lassen National Forest written by Matt Cerney and published by . This book was released on 1998 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effect of Thinning and Prescribed Burning on Wildfire Severity in Ponderosa Pine Forests written by Jolie Pollet and published by . This book was released on 1999 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt:
