Impacts Of Forest Harvesting On Long Term Site Productivity
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Author | : W.J. Dyck |
Publisher | : Springer Science & Business Media |
Total Pages | : 381 |
Release | : 2012-12-06 |
Genre | : Technology & Engineering |
ISBN | : 9401112703 |
The International Energy Agency Bioenergy Agreement was initiated as the Forestry Energy Agreement in 1978. It was expanded in 1986 to form the Bioenergy Agreement. Since that time the Agreement has thrived with some fifteen countries (Austria, Belgium, Canada, Denmark, Finland, Italy, Japan, Netherlands, New Zealand, Norway, Sweden, Switzerland, United Kingdom, United States and the CEC) currently being signatories. The objective of the Agreement is to establish increased programme and project cooperation between the participants in the field of bioenergy. The environmental consequences of intensive forest harvesting have been the subject of intense interest for the Agreement from its initiation. This interest was formulated as a Cooperative Project under the Forestry Energy Agreement in 1984. It developed further under each of the subsequent three-year Tasks of the Bioenergy Agreement (Task III, Activity 3 "Nutritional consequences of intensive forest harvesting on site productivity", Task VI, Activity 6 "Environmental impacts of harvesting" and more recently Task IX, Activity 4 "Environmental impacts of intensive harvesting". The work has been supported by five main countries from within the Bioenergy Agreement: Canada, New Zealand, Sweden, UK, and USA. The continued work has resulted in a significant network of scientists work ing together towards a common objective - that of generating a better under standing of the processes involved in nutrient cycling and the development of management regimes which will maintain or enhance long term site productivity.
Author | : W. J. Dyck |
Publisher | : |
Total Pages | : 384 |
Release | : 1994-09-30 |
Genre | : |
ISBN | : 9789401112710 |
Author | : Thomas M. Williams |
Publisher | : |
Total Pages | : 200 |
Release | : 1987 |
Genre | : Forest ecology |
ISBN | : |
Author | : |
Publisher | : |
Total Pages | : 188 |
Release | : 2005 |
Genre | : Forest productivity |
ISBN | : |
In August 20-23, 2004, a conference was held in Kamilche, WA, with the title S2Productivity of Western Forests: A Forest Products Focus. S3 The meeting brought together researchers and practitioners interested in discussing the economic and biological factors influencing wood production and value. One of the underlying assumptions of the meeting organizers was that management activities would be practiced within a framework of sustaining or improving site productivity; thus, several papers deal with methods to protect or improve productivity or discuss new studies designed to test the effects of various practices. This proceedings includes 11 papers based on oral presentations at the conference, 3 papers based on posters and 2 papers describing the Fall River and Matlock Long-Term Site Productivity study areas visited on the field tours. The papers cover subjects on forest harvesting activities, stand establishment, silviculture, site productivity, remote sensing, and wood product technologies.
Author | : David Paré |
Publisher | : |
Total Pages | : 16 |
Release | : 1999 |
Genre | : Soils |
ISBN | : 9781552610480 |
Author | : Woongsoon Jang |
Publisher | : |
Total Pages | : 34 |
Release | : 2015 |
Genre | : Forest biomass |
ISBN | : |
Biomass harvesting extracts an increased amount of organic matter from forest ecosystems over conventional harvesting. Since organic matter plays a critical role in forest productivity, concerns of potential negative long-term impacts of biomass harvesting on forest productivity (i.e., changing nutrient/water cycling, aggravating soil properties, and compaction) have emerged. There is abundant prediction of long-term impacts of intensive biomass removal on forest productivity. However, the empirical knowledge and comprehensive understanding, especially on western forests, are limited thus far. Therefore, we utilize the available findings to evaluate potential impacts of increased biomass extraction on western forests. We compare biomass harvesting with natural disturbance regimes or conventional harvesting systems in terms of organic matter redistribution in order to evaluate the possible consequences of biomass harvesting on forest productivity. We review the role of organic matter on forest productivity and compare the organic matter redistribution or removal through biomass harvesting and natural disturbances or conventional harvesting to assess potential impacts. The summarized findings are: (1) the long-term impacts of intensive biomass harvesting will be mitigated by protection of the belowground organic matter; (2) biomass harvesting could result in the accelerated leaching of nutrients; and (3) immediate understory vegetation recovery can minimize potential negative impacts. Finally, sites sensitive to harvesting impacts (e.g., fine-textured soil and steep slopes) should be approached with caution and prior planning to minimize undesirable responses.
Author | : W. J. Dyck |
Publisher | : |
Total Pages | : 200 |
Release | : 1990 |
Genre | : Forest management |
ISBN | : |
Author | : H. M. Kershaw |
Publisher | : Sault Ste. Marie, Ont. : Great Lakes Forestry Centre |
Total Pages | : 40 |
Release | : 1996 |
Genre | : Nature |
ISBN | : |
Provides a synopsis, based on expert opinion, of current scientific views on the potential impact of full-tree and tree-length harvesting on site productivity in boreal jack pine & black spruce forests. Expert opinion was solicited by questionnaire and at 4 workshops conducted on the nature of harvesting impacts on boreal forest productivity and on alternative strategies that would maintain site productivity. At the broadest level, the most important issues were: species shifts; changes in percent organic matter; and physical site disturbances, including altered hydrology and rutting. The appendix includes a copy of the survey questionnaire.
Author | : Canada. Forestry Canada. Maritimes Region |
Publisher | : Fredericton, N.B. : Forestry Canada - Maritimes |
Total Pages | : 26 |
Release | : 1988 |
Genre | : Forest litter |
ISBN | : 9780662164159 |
Intensive (whole-tree) harvesting of natural forest stands is widespread in the Maritime provinces. In some cases, the goal of whole-tree harvesting is to increase usable biomass, but often foliage and branch components are discarded at the landing site. This report examines the possible effects of whole-tree harvesting on long-term site productivity, and particularly on soil fertility. The report evaluates published data collected from different parts of the world concerning potential decline in soil fertility resulting from the loss of organic matter and base cations caused by different harvesting methods. Biomass and the amount of base cations that would be removed both by conventional and whole-tree harvesting are calculated. Published data from different stands in New Brunswick and Nova Scotia were used to examine the effect of species and site quality on base cation losses and the potential increase in soil acidification which would result from whole-tree harvesting. The consequences of high base cation losses, especially from the infertile acid soils of the region on long-term interfile acid soils of the region on long-term site productivity are discussed.
Author | : |
Publisher | : |
Total Pages | : 312 |
Release | : 2007 |
Genre | : Earth sciences |
ISBN | : |