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Author: Jean Heineman Publisher: ISBN: Category : Juvenile Nonfiction Languages : en Pages : 24
Book Description
Almost all harvested sites in the interior cedar hemlock (ICH) zone of British Columbia are currently planted, but natural regeneration can be a viable reforestation alternative in small patch cuts or where a partial canopy is retained. This report describes a project in which five small, variable-sized patch cuts in an ICH forest were studied to determine the effects of opening size, edge characteristics, and substrate quality on the distribution & composition of natural regeneration. Results are presented & discussed regarding regeneration at four years after harvest.
Author: Jean Heineman Publisher: ISBN: Category : Juvenile Nonfiction Languages : en Pages : 24
Book Description
Almost all harvested sites in the interior cedar hemlock (ICH) zone of British Columbia are currently planted, but natural regeneration can be a viable reforestation alternative in small patch cuts or where a partial canopy is retained. This report describes a project in which five small, variable-sized patch cuts in an ICH forest were studied to determine the effects of opening size, edge characteristics, and substrate quality on the distribution & composition of natural regeneration. Results are presented & discussed regarding regeneration at four years after harvest.
Author: Jerry F. Franklin Publisher: ISBN: Category : Forest regeneration Languages : en Pages : 104
Book Description
A survey of natural regeneration of Doug1as-fir and associated species was made on 15 staggered-setting cuttings four and five years after logging. These areas were on the H.J. Andrews Experimental Forest which is located in the McKenzie River area of western Oregon. Five types of cuttings were represented: (1) four north-south oriented strip clear cuts varying from 50 to 330 feet in width; (2) three east-west orientated strip clear-cut varying from 100 to 300 feet in width; (3) six patch or group clear-cuts varying from one fourth to four acres in size; (4) a shade-seed-tree cutting on which residual trees were left to provide shade and seed; and (5) a typical staggered-setting clear-cut. The modified cuttings were designed to utilize shade from the residual stand to favor regeneration by reducing high surface, soil temperatures, a major deterrent to the establishment of tree seedlings in this area. Results of the survey showed that all of the modified cutting units were better stocked than the typical staggered-setting clearcut and with two exceptions had at least 500 we11-spaced trees per acre. The east-west orientated strips regenerated best with 69 to 89 percent of milacre plots stocked. The small group clearcuts also regenerated well; stocking varied from 8 to 72 percent of milacre plots stocked. The north-south orientated strips were the most poorly stocked group of small cuttings with from 35 to 61 percent of milacre plots stocked. The shade-seed-tree cutting had 61 percent of plots stocked and the staggered-setting clearcut 28 percent of plots stocked. The statistical analysis indicated that the parameter of shade hours per plot was consistently related to regeneration of all species together and of Douglas-fir alone. The degree of this relationship varied considerably between types of units and to a lesser extent among units of a particular type. In addition there was some evidence that intermittent shading was more effective in favoring regeneration than a similar amount of shade received in a single period of time. Distance from seed source was not found to be related to stocking on the small cutting units studied. This author concludes that consideration should be given to the use of special cutting methods such as east-west orientated strip clearcuts, small patch clearcuts, and shade-seed-tree cuttings, to aid in natural regeneration of Douglas fir, especially on severe sites. These cuttings should be laid out primarily to provide shade rather than from the standpoint of seed dispersal.
Author: Susan Stevenson Publisher: UBC Press ISBN: 0774818514 Category : Nature Languages : en Pages : 458
Book Description
The vast temperate rainforests of coastal British Columbia are world renowned, but much less is known about the other rainforest located 500 kilometres inland along the western slopes of the interior mountains. The unique integration of continentality and humidity in this region favours the development of lush rainforest communities that incorporate both coastal and boreal elements. In British Columbia's Inland Rainforest, scientists bring together, for the first time, a broad spectrum of information about this distinctive ecosystem. They also consider the ecological consequences of human activities in the rainforest and present strategies for its management and conservation.
Author: Suzanne Simard Publisher: Knopf ISBN: 0525656103 Category : Science Languages : en Pages : 368
Book Description
NEW YORK TIMES BEST SELLER • From the world's leading forest ecologist who forever changed how people view trees and their connections to one another and to other living things in the forest—a moving, deeply personal journey of discovery Suzanne Simard is a pioneer on the frontier of plant communication and intelligence; her TED talks have been viewed by more than 10 million people worldwide. In this, her first book, now available in paperback, Simard brings us into her world, the intimate world of the trees, in which she brilliantly illuminates the fascinating and vital truths--that trees are not simply the source of timber or pulp, but are a complicated, interdependent circle of life; that forests are social, cooperative creatures connected through underground networks by which trees communicate their vitality and vulnerabilities with communal lives not that different from our own. Simard writes--in inspiring, illuminating, and accessible ways—how trees, living side by side for hundreds of years, have evolved, how they learn and adapt their behaviors, recognize neighbors, compete and cooperate with one another with sophistication, characteristics ascribed to human intelligence, traits that are the essence of civil societies--and at the center of it all, the Mother Trees: the mysterious, powerful forces that connect and sustain the others that surround them. And Simard writes of her own life, born and raised into a logging world in the rainforests of British Columbia, of her days as a child spent cataloging the trees from the forest and how she came to love and respect them. And as she writes of her scientific quest, she writes of her own journey, making us understand how deeply human scientific inquiry exists beyond data and technology, that it is about understanding who we are and our place in the world.
Author: M. J. Waterhouse Publisher: British Columbia Forest Science Program ISBN: Category : Nature Languages : en Pages : 56
Book Description
"In the central interior of British Columbia (Southern Interior Forest Region), Douglas-fir (Pseudotsuga menziesii) tends to occur in even-aged stands in the Interior Cedar-Hemlock Moist, Cool, Horsefly biogeoclimatic variant (ICHmk3). Douglas-fir stands are important from both forest industry and wildlife habitat management perspectives. Mule deer require mature and older Douglas-fir stands as winter range. In these ecosystems, Douglas-fir stands are typically clearcut, thereby seriously compromising habitat value as winter range. This is a pilot study to examine the response of vegetation (percent cover) and Douglas-fir regeneration (density and growth) to a range of opening sizes, opening orientation (along and across contours), and site preparation treatment (yes or no), 5 years post-harvest. The openings (15 165 m [0.25 ha], 30 165 m [0.5 ha], 60 165 m [1.0 ha], 60 330 m and 140 140 m [2.0 ha]) are options for group selection, patch cut, or clearcut silvicultural systems. Although most of the 19 tree, shrub, and grass species that mule deer could eat did not change in percent cover from pre-harvest to 5 years postharvest, the species that did change were most strongly affected by harvesting, not opening size. A major diet component, western redcedar (Thuja plicata), was reduced from 9.6 to 1.4% in the site-prepared openings, and from 9.4 to 3.9% in the openings not site-prepared, when comparing the pre-harvest to the 5th-year post-harvest assessment. However, in the 5 years since harvesting, this species has increased from 533 stems per ha to 783 stems per ha (47%) and should increase steadily in cover over time. Of note was a big increase in red raspberry (Rubus idaeus) (from 0.1% up to 14%) and a moderate increase in birch-leaved spirea (Spirea betufolia) (from 1% up to 6%); however, they generally occur in small amounts (
Author: L. Nordstrom Publisher: BC, Ministry of Forests ISBN: Category : Nature Languages : en Pages : 112
Book Description
The purpose of this review is to summarize the published literature on ecological aspects of tree/forage/livestock interactions on forest range in North America, and to identify research requirements applicable to British Columbia.
Author: Jean Heineman
Author: Jean Heineman
Author: Jerry F. Franklin
Author: Susan Stevenson
Author: Suzanne Simard
Author: 
Author: M. J. Waterhouse
Author: Alan Vyse
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Author: L. Nordstrom
Author: David M. Baumgartner