Download or read book Forest Insect And Disease caused Impacts To Timber Resources Of West central Canada written by Jason P. Brandt and published by . This book was released on 1995 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Forest Insect and Disease caused Impacts to Timber Resources of West central Canada 1988 1992 written by James Peter Brandt and published by Canadian Forest Service, Northern Forestry Centre. This book was released on 1995 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: Describes the impacts caused by major forest insects (defoliators and bark beetles) and diseases (excluding those caused by fungi) to the timber resources of the Prairie Provinces and Northwest Territories in terms of wood volume losses due to tree mortality and growth reduction for the 1988-92 period. Most impacts were calculated using an automated system based on defoliation or infestation maps produced by geographic information systems and related inventory data. Results are presented for losses due to the following: spruce budworm (Choristoneura fumiferana), jack pine budworm (C. pinus pinus), forest tent caterpillar (Malacosoma disstria), large aspen tortrix (C. conflictana), bruce spanworm (Operophtera bruceata), mountain pine beetle (Dendroctonus ponderosae), spruce beetle (D. rufipennis), Douglas-fir beetle (D. pseudotsugae), Lodgepole pine dwarf mistletoe (Arceuthobium americanum), and wood decay.
Download or read book Current Abstracts written by and published by . This book was released on 1996-11 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Forest Insect and Disease Conditions in Canada written by and published by . This book was released on 1995 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Forest Health Monitoring in West central Canada in 1996 written by James Peter Brandt and published by Canadian Forest Service, Northern Forestry Centre. This book was released on 1997 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: Summarizes 1996 results of forest health monitoring activities in Alberta, Saskatchewan, Manitoba, and the Northwest Territories, based on assessments made on 17 permanent biomonitoring plots and assessments of major forest disturbances. Brief descriptions are given of major forest disturbances in the region, including forest tent caterpillar defoliation, lodgepole pine dwarf mistletoe infestation, spruce budworm defoliation, and forest fires. Current climatic data from across the region are compared to 30-year normals for a number of parameters. Details of the assessments completed on the 17 permanent biomonitoring plots are also presented, and the state of regeneration on the plots is discussed. In addition, the current status of quarantine pests in Canada of concern to the forestry sector is described.
Download or read book Sustaining Aspen in Western Landscapes written by and published by . This book was released on 2001 with total page 486 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings RMRS written by and published by . This book was released on 1998 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Information Report written by and published by . This book was released on 1985 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Catalog of Scolytidae and Platypodidae Coleoptera written by Donald E. Bright and published by NRC Research Press. This book was released on 2002 with total page 538 pages. Available in PDF, EPUB and Kindle. Book excerpt: This publication is the second supplement to the 1992 catalog and udates information from 1995 to the end of 1999. A bibliography including over 1300 references is included. A complete index to all species names, both valid and invalid, of the world fauna Scolytidae and Platypodidae is included.
Download or read book Ecosystem Management in the Boreal Forest written by Sylvie Gauthier and published by PUQ. This book was released on 2009 with total page 574 pages. Available in PDF, EPUB and Kindle. Book excerpt: Forest Ecosystem Management. A management approach that aims to maintain healthy and resilient forest ecosystems by focusing on a reduction of differences between natural and managed landscapes to ensure long-term maintenance of ecosystem functions and thereby retain the social and economic benefits they provide to society.That is the definition of forest ecosystem management proposed in this book, which provides a summary of key ecological concepts supporting this approach. The book includes a review of major disturbance regimes that shape the natural dynamics of the boreal forest and gives examples from different Canadian boreal regions. Several projects implementing the forest ecosystem management approach are presented to illustrate the challenges created by current forestry practices and the solutions that this new approach can provide. In short, knowledge and understanding of forest dynamics can serve as a guide for forest management. Planning interventions based on natural dynamics can facilitate reconciliation between forest harvesting needs and the interests of other forest users.
Download or read book Abr g Des Publications written by and published by . This book was released on 1996 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt: Covers all publications issued by the regions, institutes and headquarters of Forestry Canada.
Download or read book The Forestry Chronicle written by and published by . This book was released on 2003 with total page 744 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Tree ring Analysis of Declining Aspen Stands in West central Saskatchewan written by Edward Huntingdon Hogg and published by . This book was released on 1999 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent decline of trembling aspen (Populus tremuloides Michx.) near St. Walburg, Saskatchewan, prompted a study to document the onset and progress of aspen decline and to examine how past climate variation and insect defoliation might have contributed to the decline. Tree-ring analysis was conducted on a total of 138 aspen in pure and mixed 5075-year-old stands, including stands showing heavy decline (more than 40% crown dieback). Past survey records and the presence of light-colored (white) growth rings indicated that stands in the study area were severely defoliated by forest tent caterpillar (Malacosoma disstria Hbn.) in 19621964 and several years during the period 19791990. Regression modeling showed that insect defoliation was the most important factor causing reduced growth in stem basal area, but drought also had a significant influence. During periods with defoliation, stem growth was often reduced to less than 10% of that recorded during the most favorable periods. In the early 1990s, stem growth had recovered in all stands except those in the heavy decline class; however, a late winter thaw followed by severe frost in April 1992 caused a temporary reduction in stem growth and might have contributed to the observed dieback. Long-term productivity of aspen stands in this region will likely depend strongly on the future dynamics of forest tent caterpillar and the incidence of extreme climatic events. Crown dieback is expected to occur when drought occurs in combination with several consecutive years of defoliation.
Download or read book Forest Insect And Disease caused Depletions To Forests Of West central Canada written by Jason P. Brandt and published by . This book was released on 1994 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Distribution of Severe Dwarf Mistletoe Damage in West central Canada written by James Peter Brandt and published by Special Report. This book was released on 1998 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: The distribution of lodgepole pine and jack pine stands severely damaged by lodgepole pine dwarf mistletoe, Arceuthobium americanum Nutt. Ex Engelm., is described for Alberta, Saskatchewan, and Manitoba. The distribution of affected stands is based on aerial and ground surveys of jack (Pinus banksiana Lamb.) and lodgepole pone (P. contorta Dougl, ex Loud. var latifolia Engelm.) forests conducted between 1984 and 1996. Depending on method of determination, between 455 000 and 585 000 ha of jack pine forests and 80 000 - 85 000 ha of lodgepole pine forests were severely diseased by dwardf mistletoe. These areas account for about 5% of the total area of pine in the study area. Annual losses due to reductions in growth and tree mortality were estimated at 2 347 000 m3. Most diseased jack pine stands occurred in the Boreal Plains ecozone, while diseased lodgepole pine stands occurred approximately equally in both the Boreal Plains and the Montane Cordillera ecozones. The report includes maps and a CD-Rom containing an Arc/Info export-format file of the coverage of pine areas severely damaged by dwarf mistletoe in west-central Canada.
Download or read book Bioclimatic Analysis of Declining Aspen Stands in Northeastern Ontario written by Jean-Noël Candau and published by Sault Ste. Marie : Ontario Ministry of Natural Resources. This book was released on 2002 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: In 2000-01, aspen decline was observed over large areas of north-east Ontario. This study analyzes the bioclimatic characteristics of the areas affected and suggests potential causes of the decline. The bioclimatic characteristics analyzed include forest tent caterpillar defoliation; drought history; forest composition, age, & structure; and soil quality.
Download or read book Introduction to Forest Diseases written by Brenda E. Callan and published by . This book was released on 2001 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt:
