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Author : Ronald E. Stewart
Publisher :
ISBN 13 :
Total Pages : 422 pages
Book Rating : 4.0J/5 ( download)
Download or read book Effects of Competing Vegetation on Forest Trees written by Ronald E. Stewart and published by . This book was released on 1984 with total page 422 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Peyton W. Owston
Publisher :
ISBN 13 :
Total Pages : 24 pages
Book Rating : 4.6Q/5 ( download)
Download or read book A Method for Assessing the Silvicultural Effects of Releasing Young Trees from Competition written by Peyton W. Owston and published by . This book was released on 1986 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: Een methode wordt beschreven, waarin men de toestandsverandering in groei en overleving van bomen beschrijft van zowel een getraceerd gebied waar geen beheersmaatregelen worden toegepast, als van een controle-gebied waar wel beheer wordt gevoerd
Author : Judy Simon
Publisher : Frontiers Media SA
ISBN 13 : 2889452050
Total Pages : 156 pages
Book Rating : 4.57/5 ( download)
Download or read book Plant Competition in a Changing World written by Judy Simon and published by Frontiers Media SA. This book was released on 2017-06-22 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt: Competitiveness describes a key ability important for plants to grow and survive abiotic and biotic stresses. Under optimal, but particularly under non-optimal conditions, plants compete for resources including nutrients, light, water, space, pollinators and other. Competition occurs above- and belowground. In resource-poor habitats, competition is generally considered to be more pronounced than in resource-rich habitats. Although competition occurs between different players within an ecosystem such as between plants and soil microorganisms, our topic focusses on plant-plant interactions and includes inter-specific competition between different species of similar and different life forms and intra-specific competition. Strategies for securing resources via spatial or temporal separation and different resource needs generally reduce competition. Increasingly important is the effect of invasive plants and subsequent decline in biodiversity and ecosystem function. Current knowledge and future climate predictions suggest that in some situations competition will be intensified with occurrence of increased abiotic (e.g. water and nutrient limitations) and biotic stresses (e.g. mass outbreak of insects), but competition might also decrease in situations where plant productivity and survival declines (e.g. habitats with degraded soils). Changing interactions, climate change and biological invasions place new challenges on ecosystems. Understanding processes and mechanisms that underlie the interactions between plants and environmental factors will aid predictions and intervention. There is much need to develop strategies to secure ecosystem services via primary productivity and to prevent the continued loss of biodiversity. This Research Topic provides an up-to-date account of knowledge on plant-plant interactions with a focus on identifying the mechanisms underpinning competitive ability. The Research Topic aims to showcase knowledge that links ecological relevance with physiological processes to better understanding plant and ecosystem function.
Author : Philip M. McDonald
Publisher :
ISBN 13 :
Total Pages : 32 pages
Book Rating : 4.3K/5 ( download)
Download or read book Competing Vegetation in Ponderosa Pine Plantations written by Philip M. McDonald and published by . This book was released on 1989 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: Planted ponderosa pine (Pinus ponderosa Dougl. ex Laws. var. ponderosa) seedlings in young plantations in California are at a disadvantage compared with competing shrubs, forbs, and grasses. In many instances, roots of competing plants begin expanding and exploiting the soil earlier and in greater numbers, thereby capturing the majority of available resources and lowering pine survival and growth. Competition thresholds or "how much is too much?" are: for treatments where a cleared radius is prescribed, no weeds are acceptable within the space needed for maximum growth of pine seedlings during the establishment period; for treatments involving the entire area, crown cover values of 10 to 30 percent seem to be the level beyond which shrub competition significantly affects pine growth. Methods for preparing the site, which include mechanical and chemical methods, use of fire, and combinations of treatments, show the interaction of site and ensuing vegetation. Techniques for controlling competing vegetation from seed include preventing such plants from getting started by use of preemergent herbicides or mats (collars). To prevent sprouting, hardwood trees and large shrubs can be pushed over, thereby getting the root crown out of the ground, or if still in the soil, grinding it out with a machine. Once present, the effect of weeds from seed can be minimized by grubbing or spraying when young, by grazing plants with cattle or sheep, or by introducing plants of low competitive ability. Once sprouting weeds are present, their effect can be minimized by spraying with chemicals, or if palatable, by grazing with cattle or sheep. Costs range from as low as $10 per acre ($25/ha) for aerially applying herbicides to $711 per acre ($1757/ha) for grinding out tanoak stumps.
Author : Alain Zuur
Publisher : Springer Science & Business Media
ISBN 13 : 0387874585
Total Pages : 579 pages
Book Rating : 4.86/5 ( download)
Download or read book Mixed Effects Models and Extensions in Ecology with R written by Alain Zuur and published by Springer Science & Business Media. This book was released on 2009-03-05 with total page 579 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book discusses advanced statistical methods that can be used to analyse ecological data. Most environmental collected data are measured repeatedly over time, or space and this requires the use of GLMM or GAMM methods. The book starts by revising regression, additive modelling, GAM and GLM, and then discusses dealing with spatial or temporal dependencies and nested data.
Author : Dean Gordon Thompson
Publisher :
ISBN 13 :
Total Pages : 546 pages
Book Rating : 4.0W/5 ( download)
Download or read book Third International Conference on Forest Vegetation Management written by Dean Gordon Thompson and published by . This book was released on 1998 with total page 546 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presents proceedings of a vegetation management conference focusing on alternative methods of vegetation control, ecosystem effects associated with vegetation management practices, and ecosystem management and its implications for forest vegetation management. Topics of presentations include plant competition, the Fallingsnow Ecosystem Project, conifer release treatments, effect of herbicides, forest regeneration, responses of specific tree species to management treatments, understory vegetation responses, hardwood species control, effects of tree spacing, use of biological indicators, effects on small mammals, residual effects of forestry herbicides on plant diversity, herbicide phytotoxicity, decision support systems, microbial control strategies, microclimatic changes following treatments, vegetation dynamics, use of prescribed burning, and the use of sheep in vegetation management. Includes author index.
Author : United States. Forest Service. Pacific Northwest Region
Publisher :
ISBN 13 :
Total Pages : 282 pages
Book Rating : 4.09/5 ( download)
Download or read book Final Environmental Impact Statement for Managing Competing and Unwanted Vegetation: Appendices A - timber growth and yield analysis, B - economy efficiency analysis, C - herbicide use and efficacy, E - silviculture program effects, F - rangelands of the Pacific Northwest region, G - vegetation management activities, J - wildlife use of six broad forest types, K - methodology used to project particulate emissions from prescribed burning written by United States. Forest Service. Pacific Northwest Region and published by . This book was released on 1988 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 544 pages
Book Rating : 4.5H/5 ( download)
Download or read book Final Environmental Impact Statement for Managing Competing and Unwanted Vegetation written by and published by . This book was released on 1988 with total page 544 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : United States. Forest Service. Pacific Northwest Region
Publisher :
ISBN 13 :
Total Pages : 556 pages
Book Rating : 4.10/5 ( download)
Download or read book Final Environmental Impact Statement for Managing Competing and Unwanted Vegetation: Final environmental impact statement written by United States. Forest Service. Pacific Northwest Region and published by . This book was released on 1988 with total page 556 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 188 pages
Book Rating : 4.8I/5 ( download)
Download or read book Productivity of Western Forests written by and published by . This book was released on 2005 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
